Oisd 116 Fire Protection Facilities Petroleum Refineries

OISD - STD - 116 FOR RESTRICTED CIRCULATION ONLY Amended Edition - October 2002FIRE PROTECTION FACILITIES FOR PETROLEUM REFINERIES AND OIL/GAS PROCESSING PLANTS OISD – STD - 116 Amended Edition, October 2002 Oil Industry Safety Directorate Government of India Ministry of Petroleum & Natural Gas Department of Petroleum & Natural Gas OISD - STD - 116 Amended Edition, October, 2002 FOR RESTRICTED CIRCULATION ONLY FIRE PROTECTION FACILITIES FOR PETROLEUM REFINERIES AND OIL/GAS PROCESSING PLANTS Prepared by COMMITTEE ON FIRE PROTECTION OIL INDUSTRY SAFETY DIRECTORATE 7 Floor, New Delhi House 27-Barakhamba Road New Delhi - 110001 th NOTES OISD (OIL INDUSTRY SAFETY DIRECTORATE) publications are prepared for use in the oil and gas industry under Ministry of Petroleum & Chemicals. These are the property of Ministry of Petroleum & Chemicals, Deptt. of Petroleum and Natural Gas and shall not be reproduced or copied and loaned or exhibited to others without written consent from OISD. Though every effort has been made to assure the accuracy and reliability of the data contained in these documents, OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from their use. These documents are intended only to supplement and not to replace the prevailing statutory requirements. Note 1 in superscript indicates the changes / modifications / th additions as approved in 20 Safety Council Meeting held in October 2002. II FOREWORD The oil industry in India is over 100 years old. Variety of practices have been in vogue because of collaboration / association with different foreign companies and governments. Standardisation in design philosophies & operating and maintenance practices at a national level was hardly in existence. This coupled with feedback from some serious accidents that occurred in the recent past in India and abroad, emphasised the need for the industry to review the existing state of art in designing, operating and maintaining oil and gas installations. With this in view, Oil Industry Safety Directorate (OISD) was established in 1986 staffed from within theindustry for formulating and implementing a series of self regulatory measures aimed at removing obsolescence, standardising and upgrading the existing standards to ensure safer operations. OISD constituted a number of committees comprising of experts nominated from the industry to draw up standards and guidelines on various areas of concern. The present document on 'Fire Protection Facilities for Petroleum Refineries & Oil/Gas processing plants' is First Revision of the document prepared by the Committee on 'Fire Protection' which was originally published in 1991. Attempts have been made to incorporate the latest technological changes, experience gained in its implementation during last 4-5 years and relevant changes in the light of various national and international codes and practices. It is hoped that the provision of this document, if implemented objectively will go a long way in improving the safety in the oil & gas industry. This document will be reviewed periodically for improvements based on the new experiences and better understanding. Suggestions from users/industry members may be addressed to : The Co-ordinator Committee on 'Fire Protection' Oil Industry Safety Directorate th 7 Floor, New Delhi House 27-Barakhamba Road New Delhi 110001 III FUNCTIONAL COMMITTEE ON FIRE PROTECTION LIST OF MEMBERS Name 1. S/Shri M.M.Kapoor R.P. Bhatla (upto 31.12.94) A.A. Raichur S. Neelkanthan P.J. Joshuva Sunil Kumar V.P. Vaidhya S.N. Mukharjee A.K. Das R.P. Saxena H.K. B. Singh Vijay M. Ranalkar Designation / Organisation Engineers India Limited (w.e.f. 1.1.95) Engineers India Limited Hindustan Petroleum Corporation Limited Madras Refineries Limited Cochin Refineries Limited Indian Oil Corporation Limited Hindustan Petroleum Corporation Limited Bharat Petroleum Corporation Limited Bongaigaon Refineries & Petrochemicals Ltd. Oil & Natural Gas Corporation Ltd. IBP Co. Ltd. Oil Industry Safety Directorate Leader Leader Member Member Member Member Member Member Member Member Status 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Member Member Coordinator In addition to the above, several other experts from industry contributed in the preparation, review and finalisation of the document. IV 1 6.0 7.1 4.FIRE PROTECTION FACILITIES FOR PETROLEUM AND OIL/GAS PROCESSING PLANTS CONTENTS SECTION 1.10 6.0 6.8 5.10 6.7 6.1 5.0 4.4 5.3 DESCRIPTION Introduction Scope Definitions Fire Protection philosophy General considerations Design criteria Fire Water System Basis Flow Rate Header Pressure Storage Pumps Distribution Network Hydrants and Monitors Material Specifications Fixed Water Spray System Fixed Water Sprinkler System Foam Systems Types of Foam Low Expansion Foam Foam Conveying Systems Floating Roof Tank Protection Fixed Roof Tank Protection Floating cum Fixed Roof Tank Protection Dyke Area/Spill Fire Protection Foam Application Rate Duration of Foam Discharge Water for Foam Making Foam Quantity Requirement Foam Compound Storage Halon/Proven Equivalent Protection System Recommended Use Quantity and Storage Floating Roof Tank Protection PAGE NO.0 5.0 4.6 5.5 6.12 7.0 3.3 5.6 6.5 5.11 6.2 5. 5 .4 6.9 5.2 5.0 2.3 6.8 6.7 5.1 7.2 7.2 6.9 6. 4 8.1 8.0 19.2 14.0 16.0 10.0 14. 6 .7 14.1 13.0 12.4 14.0 12.6 14.5 14.2 19.3 20.8 15.0 8.0 DESCRIPTION Control Room and Computer Room Protection Carbon Dioxide Systems Recommended Use System Design First Aid Fire Fighting Equipment Mobile Fire Fighting Equipment Storage of Fire Fighting Agents Detection and Alarm System Portable Fire Fighting Equipment Areas to be covered with Detectors Communication System Fire Protection System-Inspection and Testing Fire Water Pumps Fire Water Ring Main Fire Water Spray System Fixed Foam System Halon/its proven equivalent System Mobile Fire Fighting Equipment and Accessories Communication System Detectors Fire Fighting Organisation Fire Protection Training Mutual Aid Fire Emergency Procedures Fire Station/Control Room Mutual Aid Location Communication General Passive Fire Protection References ANNEXURES Typical example for calculation of Fire Water Flow Rate Typical example for calculation of Foam Compound Requirement III Broad specifications for Fire Fighting Equipment IV Fire Training Ground .2 9.1 19.0 18.0 14.0 19.3 14.SECTION 7.0 11.0 17.1 14.Facilities V Typical Agreement of Mutual Aid VI Fire Case in a large Floating Roof Tank after collapse of floating roof VII Automatic Actuated Foam Flooding System for larger Floating Roof Tanks VIII Types of foam compound I II PAGE NO. tank wagons and tank trucks and are stored or blended in bulk from where they are further despatched by tankers. tank wagons. Petroleum Depots. pose threat to surroundings as well. necessitates the introduction of in-built fire protection facilities. This standard also covers the LPG storage. located in close proximity of refineries and oil/gas processing plants under the same Management. 3. Drilling activities and facilities upstream of the Christmas tree of a well are not covered under this definition. Usual requirement of a good system is to prevent emergencies from developing into major threat to the installations and surroundings. described in the following chapters shall be examined with due consideration to the availability of the fire fighting services from city fire brigade and/or from other neighbouring industries. Lube Blending plants & Pipeline Installations located outside the premises of Refineries and AFS. Hence these installations which store large quantity of flammable materials. This standard does not cover LPG storage. Such conditions therefore.0 DEFINITIONS Even though petroleum refineries and oil/ gas processing installations are generally located in remote areas. Terminals. handling. experience shows that residential/industrial units come up in close proximity with the passage of time.FIRE PROTECTION FACILITIES FOR PETROLEUM REFINERIES AND OIL/GAS PROCESSING PLANTS 1. ii) OIL/GAS PROCESSING PLANT 'Oil/Gas Processing Plant' is a plant where oil/natural gas is collected and processed to produce Oil/LPG and other petroleum fractions. OCS & CTF which are covered in OISD-STD-144 on 'LPG Bottling Plant Operations' Q1SD-STD-169 on 'OISD Guidelines on Small LPG Bottling Plant' and OISD-STD-117 on 'Fire Protection Facilities for Petroleum ii) iii) 7 . iii) LPG BOTTLING PLANT 'LPG Bottling Plant' is a plant where LPG is stored and filled into cylinders. pipelines. v) INSTALLATION 2. Terminals and Oil Installations' are those locations where Petroleum crude/Products are received by tanker.0 SCOPE i) This standard covers the design criteria and details of the various fire protection facilities to be provided in petroleum refineries and oil/gas processing plants. However. pipelines. tank trucks. handling and bottling plants located within the refineries and oil/ gas processing plants. pumping facilities may be considered to protect the both. handling & bottling plants. in addition to their own safety. It is impractical and prohibitively costly to design fire protection facilities to control catastrophic fires.0 INTRODUCTION Depots and Terminals'. i) PETROLEUM REFINERY 'Petroleum Refinery" is a plant where crude oil is received and processed to produce various intermediates and finished products. iv) PETROLEUM DEPOTS. GGS. TERMINALSAND OIL INSTALLATIONS 'Petroleum Depots. in case of LPG storage. road and pipeline are also considered under this definition. Depots & Terminals. portable tanks or containers. Receipt and despatch of LPG by rail. The requirement of fire fighting facilities. this standard shall apply and common water storage. bottling plants. Pipeline Installations etc. vi) Deleted vii) CLASSIFICATION OF PETROLEUM PRODUCTS a) General Classification of Petroleum Products: Petroleum products are classified according to their closed cup FLASH POINTS as follows: Class 'A' Petroleum: Liquids which have flash point below 23 degrees C. etc. where the cooling effect of water is essential for extinction of fires. Class C Fires : Fires involving flammable gases under pressure including liquefied gases. potassium when the burning metals are reactive to water and water containing agents. installation includes all the facilities as listed in 3(i) to 3(iii) (located in a Refinery or Oil/Gas Processing Plant). where it is necessary to inhibit the burning gas at a fast rate with an inert gas. plant location and terrain. and in certain cases carbon dioxide. The following fire protection facilities shall be provided depending upon the viii) DELETED ix) CLASSIFICATION OF FIRES Class A Fires : Fires involving combustible materials of organic nature. sodium. where a blanketing effect is essential. zinc. Excluded Petroleum: Liquids which have flash point of 93 degrees C and above. Class D Fires : Fires involving combustible materials such as magnesium. A fire in one part/section of the plant can endanger other sections of plant as well. petroleum products. 4. halogenated hydrocarbons and ordinary dry powders. The importance of adequate fire protection facilities for hydrocarbon processing plants need not be emphasised as no plant is absolutely safe because of the inherent hazard it carries. If fire breaks out. alluminium. Class 'C' petroleum : Liquids which have flash point of 65 degrees C and above but below 93 degrees C. b) Classification for heated products : At locations where the handling temperatures are higher than the flash point of the product in circumstances where product handled is artificially heated to above its flash point. Class 'B' petroleum: Liquids which have flash point of 23 degrees C and above but below 65 degrees C. Layout of an installation shall be done in accordance with OISD-Standard-118 on Layouts. means of escape in case of fire and also segregation of facilities so that the adjacent facilities are not endangered during a fire. Liquefied gases including LPG. rubber and many plastics. A good layout provides adequate fire fighting access. or the like. These fires require special media and technique to extinguish. size of storage. it must be controlled / extinguished as quickly as possible to minimise the loss to life and property and to prevent further spread of fire.0 FIRE PROTECTION PHILOSOPHY The Fire Protection Philosophy is based on Loss Prevention and Control. powder or vapourising liquid for extinguishment. 4. pressure and temperature conditions. such as wood..For the purpose of this Standard.1 GENERAL CONSIDERATIONS Special considerations shall be given to the size of process plant. 8 . do not fall under this classification but form a separate category. as these determine the basic fire protection need. Class B Fires : Fires involving flammable liquids. paper. class 'C' product shall be considered as Class 'B' product and Class 'B' product shall be considered as Class 'A' product. fire hydrants Pumps handling petroleum products class 'A' under pipe racks Pumps handling products above auto-ignition temperature under pipe racks Air fin coolers located above pipe racks. iii) All the tank farms and other areas of installation where hydrocarbons are handled. Class 'B' petroleum storage tanks of following dimensions shall be provided with fixed water spray. i) Facilities should be designed on the basis that city fire water supply is not available close to the installation. b. Fire protection facilities shall be designed to fight two major fires simultaneously any where in the installation. shall be fully covered by hydrant System. Fixed roof tanks of diameter larger than 20 mtrs a.3 of OISD-STD-173.4. Fire water requirements will be decided as per guidelines given in Annexure-l.1 and 5. LPG loading/unloading gantries and LPG pump and compressor areas in all new refineries and for existing refineries this conversion to automatic shall be done in phased manner.4. Water spray system shall be considered for hazardous locations and equipment in process unit areas. Fixed roof tanks storing class 'C' petroleum products. - DESIGN CRITERIA The following shall be the basic design criteria for a fire protection system. vi) Floating roof tanks of diameter larger than 30 mtrs. 7.2 Fire Water System Foam System Halon / its proven equivalent System Carbon Dioxide System Dry Chemical Extinguishing System Detection and Alarm system Communication System Portable fire fighting equipment Mobile fire fighting equipment - Fixed roof tanks storing Class 'A' and class 'B' petroleum products. of diameter larger than 40 mtrs. 4. Semi-fixed foam system shall be provided for the following tanks. Water spray requirement with mode of operation to be considered in line with provisions under clause nos. on floating roof tank larger than 60 mtrs diameter( as an alternative to halon/its proven equivalent system) LPG Pressure storage vessels shall be provided with automatic water spray system. Floating roof tanks storing Class 'A' and Class 'B' petroleum products. Some of these areas are: Uninsulated vessels containing class A or B flammable liquid 3 having capacity larger than 50 m Vessels inaccessible to fire tender/ mobile equipment. whether floating roof or fixed roof. Automatic Actuated Foam Flooding Proven System may be provided: on existing floating roof tanks where Semi-fixed foam system could not be provided. Class 'A' petroleum storage in above ground tanks shall have fixed water spray system.nature of the installation and risk involved. 9 . x) vii) viii) ii) - - iv) - ix) v) Automatic water spray system shall be provided in LPG bottling stations. The water to be used should be clear Note 1 and non saline. fire water pumps and distribution piping network along with hydrants and monitors. where provided.2 Ipm/ m2 of sphere surface area.2 2 Ipm/m of surface area. water spray. for foam making etc. Water flow required for applying foam into a single largest cone roof or on a floating roof tank (after the roof has sunk) burning surface area of oil by way of fixed foam system. - 5. xiii) 5. The spheres should be laid in two separate groups with each group limited to a maximum of 6 vessels The groups shall preferably be separated by a distance of (R+30) mts. deluge/ sprinkler. If the water rate as calculated above works out to be more than 2000 m3/hr the layout of the spheres should be reviewed. or by use of water/foam monitors. FIRE WATER SYSTEM Water is an essential and the most important medium available for fire protection. Water flow for supplementary stream shall be considered as 288 m3/hr as indicated under item (i).2 FLOW RATE Two of the largest flow rates calculated for different sections as shown below shall be added and that shall be taken as design flow rate. at a rate of 3 Ipm/m of tank shell area. Water flow calculated for all other tanks falling within a radius of (R+30) mts from centre of the tank - - - iii) Water flow rate requirements for 10 . A typical example for calculating design fire water flow rate is given in Annexure-1. water curtain. Capacity of each hydrant outlet as 36 m3/hr and of each monitor as 144 m3/hr may be considered at a pressure of 7 kg/cm2g. Water flow calculated for all other spheres falling within a radius of (R+30) mts from centre of the sphere on fire at the rate of 10. Oil loading/unloading Tank Truck & Tank Wagon Gantries shall be provided with water spray and/or foam system. Water flow calculated for all other tanks falling outside a radius of (R+30) mts from centre of the tank on fire and situated in the same 2 dyke area at a rate of 1 Ipm/m of tank shell area. The main components of the fire water system are fire water storage. computer rooms and pressurised rooms.0 5.8 for foam rates). ii) Fire water flow rate for LPG sphere storage area shall be aggregate of the following: Water flow calculated for cooling LPG sphere on fire at a rate of 10. (Refer section 6. For these purposes water is used in various forms such as straight jet. cooling of equipment and protection of equipment and personnel from heat radiation. Water is used for fire extinguishment. fire control. water fog.1 BASIS The fire water system in an installation shall be designed to meet the fire water flow requirement for fighting two fires simultaneously requiring largest water demand. i) Fire Water flow rate for tank farm shall be aggregate of the following: Water flow calculated for cooling a tank on fire at a rate of 3 Ipm/m2 of tank shell area. shall be based on using 4 single hydrant outlets and 1 monitor simultaneously. Fire water flow rate for supplementary stream. on fire and situated in the same 2 dyke area.xi) xii) Deleted Halon / its proven equivalent fire protection system should be provided for process control rooms. 5.3 i) Standby pumps When total number of Working pumps work out to be one or two. 50% standby pumps shall be provided.5. When total number of working pumps are more than two. 100% standby pumps shall be provided.4 a. 5. All pumps should be identical with respect to capacity and head characteristics.5. tubewell or lake. to be worked out on the basis of design criteria as per section 5. concrete or masonary. Such water supplies may be connected from cooling water supply header and/or treated effluent discharge headers. ii) 11 .5 PUMPS Fire water pumps shall be used exclusively for fire fighting purposes. fire water supply may be sea water or other acceptable source like treated effluent water. emergency water supply in the event of depletion of water storage shall be considered. The capacity of each pump shall not be less than 400 m^hr nor more than 1000 cu. The shut-off head shall not exceed 120% of rated head.9.mt/hr.2.3 HEADER PRESSURE The fire water system shall be designed for a minimum residual 2 pressure of 7. for horizontal pumps and 140% in case of vertical turbine type pumps. In existing refineries.4 b. this shall be achieved in a phased manner. MAKE UP WATER Suitable provisions shall be kept for make up fire water during fire fighting time. Large natural reservoirs having water capacity exceeding 10 times the aggregate water requirement of fire pumps may be left unlined. ponds etc.0 kg/cm2 gat all the time. 5. The fire water network shall be kept pressurised at minimum 7. Fire water supply shall be preferably from fresh water source such as river.0 kg/cm g at the hydraulically remotest point of application at the designed flow rate at that point. Process Cooling Water. The pumps shall be capable of discharging 150% of its rated capacity at a minimum of 65% of the rated head. Storage reservoir shall be in two equal interconnected compartments to facilitate cleaning and repairs. 5. Provision to be made to divert water from various sources like ETP. STORAGE Water for the hydrant service shall be stored in any easily accessible surface or underground lined reservoir or above ground tanks of steel. Where make up water supply system is 50% or more this storage capacity may be reduced to 3 hours aggregate working capacity of pumps. The effective capacity of the reservoir above the level of suction point shall be minimum 4 hours aggregate working capacity of pumps. river. ii) iii) The pumps shall be horizontal centrifugal type or vertical turbine submersible pumps. to the fire water system.2 Capacity of Pumps The capacity and number of main fire water pumps shall be fixed based on design fire water rate. In addition to fire water storage envisaged as above. 5.5.fire fighting in other major areas shall be calculated based on criteria as given in section 5. 5.1 Type of Pumps Fire water pumps shall be of the following type: i) Electric motor centrifugal pumps Deleted Diesel engine centrifugal pumps driven driven 5. Where fresh water source is not easily available. 6. The direct feeder line shall not run along with other HT cables. The capacity of jockey pumps shall be 3% (minimum) and 10% (maximum) of the design fire water rate and its head higher than the main fire water pumps. Protection pipelines for underground ii) iii) iii) 5.4 Jockey Pumps The fire water network shall be kept 2 pressurised at minimum 7. However.6.6 Deleted DISTRIBUTION NETWORK iii) 12 . Each diesel engine shall have an independent fuel tank adequately sized for 6 hours continuous running of the pump. Isolation valves shall be provided in the network to enable isolation of any section of the network without affecting the flow in the rest. The mains shall be provided with protection against soil corrosion by suitable coating/wrapping.5. 2 Jockey pumps (1 working plus 11 standby) shall be provided.5. ii) 5. The isolation valves shall be normally located near the loop junctions.0 kg/cm g by jockey pumps.1 Looping The fire water network shall be laid in closed loops as far as possible to ensure multi-directional flow in the system. Additional valves shall be provided in the segments where the length of the segment exceeds 300 mts. 5.5. The diesel engines shall be quick starting type with the help of push buttons located near the pumps.5.5 mtrs earth cushion under the roads.7 5. the ring main system shall be laid underground beneath the frost layer.No. of pumps and diesel pump capacity shall also be minimum 50%. Deleted Main fire water pumps shall start automatically and sequentially with pressure switches on fire water mains. Power supply to the pump motors should be from two separate feeders.2 Criteria for above / underground network The fire water network piping should normally be laid above ground at a height of 300 to 400 mm above finished ground level. the fire water network piping shall be laid below ground level at the following places. 5. of diesel driven pumps shall be minimum 50% of the total no.6. and get damaged mechanically. 5. The capacity of the pump shall be sufficient to maintain system pressure in the event of leakages from valves etc. Where frost condition warrants. or at remote location. In case of poor soil conditions it is recommended that concrete/ masonary supports be provided under the pipe.6 Location of pumps Fire water pumps shall be located as far away as possible ( not less than 60 mtrs ) from hazardous areas to avoid any damage in case of fire/explosion. pipes may be protected with concrete/steel encasement. 5. In case of crane movement areas.5 i) Power Supply for Fire Water Pumps A direct feeder dedicated only to fire water pumps shall be laid from the sub-station to ensure reliable power supply. i) ii) Road crossings Places where the above ground piping is likely to cause obstruction to operation and vehicle movement. 5.3 iv) v) Where the pipes are laid underground the following protections shall be provided: i) The main shall have at least one meter earth cushion in open ground and 1. Section 5. 5. the following protection shall be provided: i) The fire water mains shall be laid on independent sleepers by the side of road. Hydrants / monitors shall not be located inside the dyke area.7 Fixed water monitors 5. Each of these connections shall be provided with independent isolation valves. the network around tank farm shall be suitably designed. 5.6.7 5.6. however. The horizontal range and coverage of hydrants with hose connections shall not be considered more than 45 mtrs. ii) ii) iii) 5.5 mm conforming to Indian Standards.7. The location of the hydrants shall be carefully decided keeping in view the easy accessibility. This aspect should be given due consideration. The outlets shall be of female instantaneous type having a standard size of 63.5 ii) 13 . The hydrants shall be located at a minimum distance of 15 mtrs from the periphery of storage tank or hazardous equipment under protection.6. The mains shall be supported at regular intervals not exceeding 6 mtrs. At least one hydrant post shall be provided for every 30 mtrs of external wall measurement or perimeter of unit battery limit in case of high hazard areas. Hydrants protecting utilities and miscellaneous buildings in high hazard areas may be spaced at 45 mtrs intervals.6. The system for above ground portion shall be analysed for flexibility against thermal expansion and necessary expansion loops shall be provided wherever called for.6. Several combinations of flow requirements shall be assumed for design of network.9 Elevated/ oscillating/ remote operated monitors The requirement of elevated/oscillating/ remote operated monitors may become necessary for protection of critical equipment at higher elevation / inaccessible areas.1 HYDRANTS AND MONITORS Hydrants i) Hydrants shall be located keeping in view the fire hazards at different sections of the premises to be protected and to give most effective service. For large water requirement for floating roof tank (Annexure-vi). Layout i) Fire water mains shall not pass through buildings or dyked areas. Each hydrant shall have two outlets inclined towards the ground. The hydraulic analysis of network shall be done. For process plants location of hydrants shall be decided based on coverage of all 5. 5.6 Fire hydrants Fire hydrants shall be provided in the network to ensure protection to all the facilities.8 Fixed water monitors shall be provided on the fire water network (Ref. These shall not be laid along with process piping on common sleepers.6.7 for details). Design flow rates shall be distributed at nodal points to give the most realistic way of water requirements in an emergency.5. The maximum distance between two hydrants. shall not exceed 30 mtrs around hydrocarbon storage and hazardous areas and 45 mtrs in other areas.4 Protection pipelines for above ground Where the pipes are laid above ground. Sizing Fire water distribution ring main shall be sized for 120% of the design water rate. 4 Mobile/Fixed High Water/Foam Monitors Volume Provision for fighting storage tank fire from road side through mobile/fixed high volume long range monitors should be considered at critical storage locations. from the hazard to be protected.3 Deleted 14 . However.. heaters. Tank Wagon & Tank Lorry Loading/ unloading gantry area should be provided with alternate water cum foam monitors having multipurpose combination nozzles for jet spray & fog arrangement and fire hydrants located at a spacing of 30 mtrs on either sides of the gantry. 5. 5. Provision of hydrants within buildings shall be in accordance with Standard IS Standard 3844.1.areas. A minimum of 2 monitors shall be provided for the protection of each such area. this distance shall not be less than 5 mtrs and more than 15 mtrs from the face of building. iv) ii) 5. Hydrants/Monitors shall be located along road side berms for easy accessibility as far as possible.1 i) Monitors Monitors shall be located at strategic locations for protection of cluster of columns.6 Miscellaneous i) Hydrants and monitors shall not be installed inside the dyked areas. All hydrant outlets shall be situated at a workable height of about 1.8 MATERIAL SPECIFICATIONS All the materials used in fire water system using fresh water shall be of approved type as indicated below. The location of water monitors shall not exceed 45 mtrs.7. Use of Cast Steel valves is preferable in offsite areas also. Monitors shall be located to direct water on the object as well as to provide water shield to firemen approaching a fire.7. The use of Cl pipes is not recommended for fire water service within installations. however. etc. The requirement of monitors shall be established based on hazard involved and layout considerations. iii) Double headed hydrants with two separate landing valves on 4" stand post shall be used.5 Hose Boxes Provision of hose boxes may be considered at critical locations for housing hoses and nozzles. ii) 5.2 mtrs above ground level. i) Pipes: Carbon Steel as per IS: 3589/ IS:1239 or its equivalent. Hydrants / Monitors shall be preferably located with branch connections and not directly over main header for easy accessibility. Water monitors for protection of heaters shall be installed so that the heater can be isolated from the remainder of the plant in an emergency. it may be decided on economic considerations for each case. 5. Isolation valves having open/close indication shall be Gate valves. 5. for 12" & above sizes.7. The monitors should not be installed less than 15 mtrs from hazardous equipment. In the case of buildings.7. gassifiers. ii) Isolation Valves : Cast Iron in offsite area : Cast Steel in unit areas and fire water pump stations. and where it may not be possible to approach the higher levels. In case of saline water service the fire water main pipes shall be cement mortar lined internally. Butterfly valves should be used. m service located under pipe rack) .2 lpm/sq..2 Water Spray Application Rates The following water spray application rates are recommended for general guidance.9. the area should be divided into suitable segments so that maximum water requirement for spray application should generally not exceed 1200 m3/hr.Pumps(Volatile product 20. m 10.2 lpm/sq. These rates may be reviewed on case to case basis and increased.2 lpm/sq.2 ix ii) Water supply patterns and their densities shall be selected according to need. Gunmetal / Aluminium / landing valves Stainless Steel / AIZn Alloy iv) Monitors Metal : Carbon Steel/ Gun temperature rise. if required.9.other extremely hazardous 10. i) Fixed water spray should be provided hazard areas immediate application is required (refer above). The piping system is connected to the hydrant system water supply through an automatically or manually actuated valve which initiates the flow of water. 1 Ipm/m2 of tank shell area for exposure protection for tanks located outside (R+30) mtrs from centre of tank on fire within the same dyke area.1 FIXED WATER SPRAY SYSTEM General Fixed water spray system is a fixed pipe system connected to a reliable source of water supply and equipped with water spray nozzles for specific water discharge and distribution over the surface of area to be protected. Item rate Water 2 application Atmospheric storage 3 Ipm/m2 of tank shell tanks area for tank on fire 3 Ipm/m2 of tank shell area for exposure protection for tanks located within (R+30)mts from centre of tank on fire within the same dyke area.4 lpm/sq.1 5.4 lpm/sq. system in high where of water 4. While calculating the water rates for spray application for cases other than tanks/vessels. m area LPG pump house LPG Tank Truck & Tank Wagon loading/ unloading gantries LPG Bottling plants : 20. Pressure Storage Vessels 10. Fire water spray system for exposure protection shall be designed to operate before the possible failures of any containers of flammable liquids or gases due to Process Unit Area . The system shall. therefore. 5. v) Fire Hose IS 636: Reinforced rubber lined of Type A or Synthetic hose of Type B vi) In case of underground mains the isolation valves shall be located in RCC/brick masonary chamber. vii) The above ground fire water mains and the fire hydrant standpost shall be painted with corrosion resistant "Fire Red" paint. be designed to discharge effective water spray within shortest possible time.iii) Hydrant: Standpost: Carbon Steel Outlet valves/ . viii) Water monitor and hose box shall also be painted "Fire Red". m of shell area 5. m 15 . the design of which should include the flow requirement of the largest sprinkler installation.2 Ipm/m2 area 2 5. please refer Annexure-VIII. subject to a minimum of 150 m3/hr. There are three types of systems: i) Fixed ii) Semifixed iii) Mobile 6. Conventional systems are of the open outlet type in which foam discharges from all outlets at the same time. suitable proportioning equipment for drawing foam concentrate and making foam 6.. shed Oil Tank Truck & Tank Wagon loading/ unloading gantries Cable Trays Transformers 15. Sprinkler systems are used for fire extinguishment in the hazards located inside buildings.2 Ipm/m area 10.LPG cylinder cold repair. The mixture of water and foam compound (foam solution) is then mixed with air in a foam maker for onward transmission to burning surface.Empty cylinder storage . eductor.1 LOW EXPANSION FOAM For combating large hydrocarbon fires particularly in a contained area like storage tank. Some of the examples being: ii) a) Car parking in basement b) Building/sheds storing combustible and flammable materials. The water flow rate for automatic sprinkler system for car parking area shall be taken as 5.3 CONVEYING SYSTEMS The system consists of an adequate water supply.1 10.Carousel machine .2 Ipm/m 2 be used if called for depending on risk involved.0 10. 6. iii) The water for sprinkler system shall be tapped from plant fire hydrant system. a proper piping system. FOAM SYSTEMS TYPES OF FOAM For detailed description of Fire Fighting Foam Compounds.3 lpm/sq. The process of adding or injecting the foam to water is called proportioning.10 FIXED SYSTEM i) WATER SPRINKLER Fixed water sprinkler system is a fixed pipe tailor made system to which sprinklers with fusible bulbs are attached. 5. iv) The design flow for sprinkler installation would depend on the type of hazard and height of piled storage. foam has proved useful for its inherent blanketing ability. The design water flow shall be restricted to a minimum of 100 m3/hr and to a maximum of 200 m3/hr. m 10. Aqueous Film Forming Foam (AFFF) compound is technically superior and compatible with other fire fighting agents. heat resistance and security against burnback. The design flow rate for other areas shall be taken as 10. Higher water application rates may 16 .2 lpm/sq. The system is usually activated by heat from a fire and discharges water over the fire area automatically.2 lpm/sq. m 10. Efficient and effective foam delivery system is a vital tool for its usefulness in controlling the fire. and a maximum of 400 m3/ hr.1 Fixed Foam System Fixed foam conveying system comprises of fixed piping for water supply at adequate pressure. m 6.2 Ipm/m22 of the area protected by sprinkler installation. suitable proportioning equipment. covering the entire hazard within the confines of the system.2 lpm/sq. Each sprinkler riser/system includes a controlling valve and a device for actuating an alarm for the operation of the system.Filled cylinder storage . foam concentrate tank. foam makers and discharge devices designed to adequately distribute the foam over the hazard. supply of foam concentrate.1 2 Ipm/m of the area protected by sprinkler installation.3. m 10. (Refer Annexure-VII for details and typical sketch) 6. vapour seal box. Features of foam system for floating roof tank protection shall be as follows: i) System shall be designed to create foam blanket on the burning surface in a reasonably short period. 6.3 Mobile System Mobile system includes foam producing unit mounted on wheels which may be self propelled or towed by a vehicle. 6.2 Semifixed Foam System Semi-fixed foam system gets supply of foam solution through the mobile foam tender. ii) iii) iv) 6. certain other systems as follows are also available : Sub-surface foam injection: This is a system for protection of fixed roof storage tanks.3. Minimum number of foam discharge outlet 2 3 4 5 upto 20 >20 upto 25 >25 upto 30 >30 upto 35 17 . fragile under low pressure. fixed piping system for onward conveying to foam makers for making foam. Automatic Actuated Foam Flooding system: In this system all the components and ingredients including premix solution are contained within the system. Foam makers/foam pourers shall be located not more than 24 mts apart on the shell perimeter based on 600 mm foam dam height.3. Such systems usually have a premix solution supply tank pressurised by air or inert gas. Under the Seal Foam application: This is a system for floating roof tank where the foam travels through a flexible pipe inside the tank upto the center of the tank roof and exits at the seal rim of the floating roof precisely where the fire is located thus rapidly flooding the seal rim area and quickly extinguishing the fire. Where two or more pourers are required these shall be equally spaced at the periphery of the tank and each discharge outlet shall be sized to deliver foam at approximately the same rate. A minimum of two foam pourers shall be provided. foam shall be poured at the foam dam to blanket the roof seal. A fixed piping system connected to foam makers cum vapour seal box in case of cone roof tanks and foam maker and foam pourers in the case of floating roof tanks conveys foam to the surface of tank. This comprises of high back pressure foam generator and connected through product lines or separate lines near the bottom of the tank. Features of the foam system for fixed roof protection shall be as follows: i) The vapour seal chamber shall be provided with an effective and durable seal. These units supply foam through monitors/foam towers to the burning surface. The automatic sensing of fire releases this pressure and places the system into operation.solution. However. and foam pourer.5 FIXED ROOF TANK PROTECTION Foam conveying system shall have same features as of floating roof tank excepting that a vapour seal chamber is required before the foam discharge outlet. Foam shall be 'applied to the burning hazard continuously at a rate high enough to overcome the destructive effects of radiant heat. to prevent entrance of vapour into the foam conveying piping system. ii) iii) Tanks should be provided with foam discharge outlets/pourers as indicated below : Tank Diameter in mtrs. Suitable detection system may be provided to activate the foam system.4 FLOATING ROOF TANK PROTECTION For floating roof tank. Two hose streams of foam each with a capacity of 1140 Ipm of foam solution.6 FLOATING CUM FIXED TANK PROTECTION ROOF Protection facilities shall be provided as required for fixed roof tank. However.1 Ipm/m of liquid surface areas. the rate 2 considered should be 8. Protein foams in normal use have a 3% to 6% proportioning ratio. spills and oil separator. This can be suitably adjusted for different pourer capacity in accordance with para 6. Tanks containing liquid hydrocarbons . (ii) and (iii) for a minimum period of 65 minutes.II. i) Foam solution application at the 2 rate of 5 Ipm/m for the liquid surface of the single largest cone roof tank or at the rate of 12 Ipm/m2 of seal area of the single largest floating roof tank whichever is higher..11 FOAM QUANTITY REQUIREMENT Calculation of foam compound storage should be based on the design criteria as per item 4. For cone roof tanks containing liquid hydrocarbons. 6.>35 upto 40 >40 upto 45 >45 upto 50 6 8 10 Tanks containing Class 'A' & 'B' Petroleum or liquids heated above their flash points --.10 WATER FOR FOAM MAKING Water quantity required for making foam solution depends upon the type of foam used.Class 'C' Petroleum . The quantity of foam compound required should be calculated based on 3% or 6% concentrate.1 Ipm/m2 of the liquid surface of the largest floating roof tank for 65 minutes may be considered for a roof sinking case. the foam solution delivery rate shall be at least 5 Ipm/m2 of liquid surface area of the tank to be protected. potential foam losses from wind and other factors shall be considered. In case of floating roof sinking. In determining total solution flow requirements.4 (iii). (Refer Annexure-VI for sample calculation) ii) iii) One portable foam monitor of 4500 Ipm foam solution capacity. The estimation of number of foam discharge outlet is based on pourer capacity of 1000 Ipm at a pressure of 7 kg/cm 2 g upstream of eductor. 6. For floating roof tanks containing liquid hydrocarbons foam solution delivery 2 rate shall be at least 12 Ipm/m of seal area with foam dam height of 600 mm of the tank to be protected.2. foam supplier data shall be used for determining water quantity required. 6. The aggregate quantity of foam solution for a single largest tank fire should be calculated as sum total indicated below under items (i). A typical example showing calculation of foam compound requirement is given at Annexure .7 DYKE AREA/SPILLS/OIL SEPARATOR PROTECTION Portable monitors/Medium Expansion foam generator/foam hose streams shall be considered for fighting fires in dyked area. 6..60 minutes iii) Where the system's primary purpose is for spill fire protection --30 minutes 6.9 DURATION OF FOAM DISCHARGE The equipment shall be capable of providing primary protection at the specified delivery rates for the following minimum period of time. a foam solution application rate of 8.30 minutes 18 .. 6.8 FOAM APPLICATION RATE The minimum delivery rate for primary protection based on the assumption that all the foam reaches the area being protected shall be as indicated below. However. Halon / its Proven Equivalent shall be considered for such protection system. Quantity of foam compound equal to 100% of requirement as calculated in 6.3 FLOATING PROTECTION ROOF TANK - - - 7.0 HALON / ITS PROVEN EQUIVALENT PROTECTION SYSTEM Halon is a liquefied gas extraordinarily effective as fire extinguishing age However. As an alternative to the above system. "The Protection System can detect. Hence. subjected to a minimum of 60. Alcohol Resistant Foam can be used for specific application.000 liters.3 may be considered. its heat causes one or more spray nozzles to open and the gas is applied on the surface of fire and alarm is sounded. All the components of the system shall be capable of withstanding heat of fire and severe weather conditions. The Protection System broadly consists of container. due to its ozone depleting properties it is being phased out as per the Montreal Protocol.11 should be stored in the Installation. minimum of 77000 liters foam should be stored. control rooms and computer rooms. 7. ring mains/ laterals as required.4. CONTROL ROOM AND COMPUTER ROOM PROTECTION Halon / its proven equivalent is recommended for protection of control rooms and computer room. Floating roof tanks of 60 mtrs and above diameter should be considered for protection by installing such system. The deteriorated foam compound can be used for fire training purposes. spray nozzles. Storage containers shall be located as near as possible to hazard area but shall not be exposed to fire. The time needed to obtain the gas for replacement to restore the systems shall be considered as a governing factor in determining the reserve supply needed. fluoroprotein or AFFF. Minimum life of foam compound shall be taken as per manufacturer's data.2 QUANTITY AND STORAGE Each hazard area to be protected by the protection system shall have an independent system. 7. control and actuation mechanism. Foam compound can also be stored in overhead storage tank of suitable capacity for quick filling of foam tender/nurser during emergency. This should be in addition to water spray and foam protection system as described in section 6.1 RECOMMENDED USE 19 . for installations having tankages larger than 60 mtrs diameter.0) or foam sufficient to fight two major fires whichever is more. Storage containers shall be carefully located so that they are not subjected to mechanical. control and extinguish the fire and also simultaneously give audio visual indication on the control panel. signalling equipment and cables. Minimum of 90% of storage of foam compound shall be of AFFF type.12 - FOAM COMPOUND STORAGE Foam compound should be stored in containers of 20-30 Its capacity or 200/210 Its capacity barrels in case of protein. (Ref Section 14. 100% standby containers shall be considered for each protected hazard. Foam compound shall be tested periodically for ensuring its quality and the deteriorated quantity replaced. automatic actuated proven foam flooding system as described in section 6. chemical or other damage. heat detection and activation devices. 7. feed lines.4 Floating roof tank can be protected by Halon or its proven equivalent for its in built detection. If a rim seal fire occurs. The system is recommended for protection of floating roof tanks. Type of foam compound used can be protein or fluoroprotein or AFFF. 7.6. local application system should be used. a) Total flooding system is provided where there is a permanent enclosure around the hazard. Hazard Basic Flooding design factor 20 . Carbon dioxide is best applied to a fire hazard through a fixed system consisting of CO2 storage.0 CARBON DIOXIDE SYSTEMS Carbon dioxide is an odourless and colourless inert gas having a proven fire extinguishing property. In order to minimise the exposure. cable ducts.1 RECOMMENDED USE Fixed CO2 systems can be provided for various hazards. The requirement for each item should be decided at the design stage. The basic design concentration depends on the type and location of the hazard. b) Where the hazard is not enclosed or is so large that total flooding system turns out to be uneconomical. 8.6 m from the hazard.2.2 Fixed CO2 system should be designed and installed in accordance with the relevant national/ international standards and only by those who are competent . etc. A minimum dimension of 1.60 gear rooms.2 SYSTEM DESIGN 8. distribution piping and discharge nozzles.mt Control rooms. Oil filled transformers are such examples. Minimum effective discharge time for computing quantities of CO2 shall be 30 seconds.mt of an assumed volume around the hazard . 8. experienced in this field.1 Portable fire fighting equipment shall be provided in Refinery/Process plant as indicated below 8.0 ducts Etc.2.It is considered good practice to avoid unnecessary exposure to Halon /its equivalent.2 m shall be considered for calculating the volume of the assumed enclosure.3 9. it extinguishes fire by cutting off the oxygen and creating an inert atmosphere around the hazard. Some of the hazards which can be effectively protected are as follows: a) Unmanned turbo-generators. The rate of discharge for the local application system may be taken as 16 kg/min/cu. 8. If the inert atmosphere is maintained for a reasonable time the possibility of flash back also is reduced. persons should be evacuated from the areas after the system comes into operation. switch 50 1. cable Record rooms 65 2. When applied in a proper manner and in proper quantities on a fire hazard. b) Record rooms c) Dry type Oil filled transformers. Concentration(%) kg of CO2/cu.1 The basic requirement of designing the fixed CO2 system for fire protection is to provide a design concentration of CO2 around the hazard for a reasonable time.2.1 9. The assumed walls and ceiling of this enclosure shall be at least 0. FIRST AID EQUIPMENT FIRE FIGHTING 8. switch gear rooms. Persons in the confined area need to be evacuated before the CO2 flooding system is operated. The design concentrations and flooding factor are given below for some of the hazards. At least one fire extinguisher should be provided for every 250 sq.mt of hazardous operating area. Stretcher. Safety Helmets. work shops. substations. vi) Miscellaneous Equipment like Portable Gas detectors. Red/Green Flag for fire drill. Fire Proximity Suit. Fibre glass First Aid box.mt of hazardous operating area. Self contained breathing apparatus. Fire Helmets. ii) Dry chemical powder fire extinguishers 25/50/75 kg capacity iii) CO2 extinguishers of 4. The number should be determined based on the max. Explosimeters.Description i) Dry chemical powder fire extinguishers -10 kg capacity Norms/criteria to determine the quantity needed To be located in process units. Air line breathing apparatus. At least one fire extinguisher should be provided for every 250 sq. Rubber hand gloves etc. Extinguishers iii) 5 Kg DCP Extinguisher iv) Thermal imaging area To be provided at elevated location. tank truck/ tank wagon loading areas. emergency lighting etc. Fire Entry suit. laboratory. Hand operated siren.2 Additionally. pump area. static charge meter. 21 . LPG storage area. As an aid to the fireman during fire fighting operation to locate the seat of the fire and to facilitate search and rescue operation v) Personal Protective Equipment required during Fire Fighting like Water based jet blanket. mt of of hazardous operating area.0 kg on wheels iv)Portable extinguishers v) Deleted halon vi) Steam lancers(as a part of utility station) vii) Rubber hose reel For fighting incipient fires at flange leakages & hot pumps. The number should be determined based on the max. on case to case basis. computer rooms. Oil separator. power station buildings etc. Oxygenmeter. To be located in Process (25mm)unit battery limits and other process area. Safe walk roof top ladder. LPG bottling plant.8/9.5 Kg or 6. 9.) ii) CO2 Pressure type To be located in office buildings. To be located in control rooms. To be located in critical operating areas. travelling distance of 15 mtrs. following items may also be considered: i) Foak Extinguishers (9 To be located in Oil Pump House ltrs. At least one fire extinguisher should be provided for every 750 sq. The number of unit required for these may be decided by local management. laboratories and office buildings. pump houses. laboratories etc. TEL blending plant. travelling distance of 15 mtrs in above areas. To be located in substations and power stations. 9.2 SYSTEM DESIGN: Basic requirement of designing the dry chemical extinguishing system is to provide for sufficient quantity and rate of discharge depending upon the hazard. location of the plant and statutory requirements. discharge alarm. System can be actuated manually or automatically on visual or automatic means of detection. warning signs. 9.'B'.'C' & 'D' fire using multipurpose dry chemical. System consists of dry chemical powder and expellent gas container assemblies of capacity sufficient for given hazard with distribution piping and discharge nozzles. Requirement for each item should be finalised while deciding design basis.1 RECOMMENDED USE: Dry chemical powder extinguishing system can effectively be used on following hazards. (b) The quantities indicated below. The foam tender should have foam tank capacity of 3000/3600 Its. Electrical hazard such as transformers or oil circuit breakers. `Pre-engineered system (Refer NFPA-17 for limitations & precautions for use of dry chemical and for system design) 10. Hand hose line system. Local application system c. Total flooding system b. Class 'A'.1 The exact number of mobile fire fighting equipment shall be higher of the following items (a) or (b): (a) The quantities firmed up in each case based on two simultaneous major fires taking into consideration the size. Personnel safety shall include training.3.3. 9. and the pump capacity of minimum 2 2500 to 4500 Ipm at 8. respiratory protection and prompt evacuation of personnel.0 MOBILE FIRE FIGHTING EQUIPMENT 10. manually or automatically. Following types of systems can be provided to protect a hazard: a. Combustible solids having burning characteristic like naphthalene or pit which melts while on fire. through a distribution system onto or into the protected hazard.5 kg/cm .3 DRY CHEMICAL EXTINGUISHING SYSTEM The extinguishing system comprises of supplying the Dry Chemical agent. i) 3 nos of foam tenders out of which two are for fire fighting one for spill/ standby. Alarm and indication shall be provided to show that the system has operated and personnel response is needed. ii) Deleted 22 . and d. 0 STORAGE OF FIRE FIGHTING AGENTS The following quantities of fire fighting agents shall be stored in the Refinery. of Mobile fire trailer pumps of capacity ranging from 1800 to 2250 Ipm at discharge 2 pressure of 7 kg/cm g. .2 In addition to above.One 15mtrs hose length/hydrant. xiii) 4" Hoses of suitable length for feeding to large capacity monitors wherever installed. ii) For installation with more than 100 hydrants: . The hose length so calculated may be suitably divided into hose lengths of 15mtrs.One 15 mtrs hose length/hydrant. of foam tank trailers with water cum foam monitors having foam tank capacity of 1000 liters and monitors capacity of 2500 to 3200 Ipm. Capacity of DCP tender may be reduced to 2000 kg if considered necessary.One 15 mtrs hose length for every 10 hydrants above 100. These are required for fighting LPG/Gas fires. foam making branch pipes. Of the total requirement of the hoses. The hose length shall be calculated as follows: i) For installation with hydrants upto 100 Nos: . minimum 50% of hoses shall be of type B. Multipurpose fire fighting skid may be used as a single self sufficient unit of having capacity of discharging foam. Broad specifications of the fire fighting equipment listed above are given in Annexure-lll. The throw of the monitor shall be 40 to 50 mtrs of Monex or equivalent DCP charge. Description Qty. inflatable lifting bags. vii) 1 to 2 numbers of mobile Foam Nurser (Trailer mounted foam compound supply tank) with foam compound tank of 7000 . ix) Fire Hoses: IS 636: Type A or Synthetic hose of Type B. expanders. nozzles. breathing apparatus etc. 10. 22. 11. to be stored 23 . leak pads.16000 Itrs capacity with suitable pump for foam transfer. x) Fire jeep (s) with two way radio communication facility and towing facility. A long range monitor should have a variable throw of 15/25/40 kg/sec. vi) 2 nos. provision of following equipment may also be considered: i) ii) Suitable equipment shall be provided for fighting high level fires.1 (i)/(ii). viii) 1 to 2 nos.N o. and.iii) One DCP tender having 2 spheres of 2000 kg capacity each with Nitrogen as expellent gas. as per requirements. for the first 100 hydrants. xi) One ambulance fitted with medical aid and suitable arrangements. saving power and time in combating a fire. iv) Emergency rescue equipment like cutters.5 mtrs or 30 mtrs. etc. xii) Other accessories. water and DCP and thus performing multiple functions effectively. individually or together. of Trolley mounted water cum foam monitors of capacity of 5000 to 10000 Ipm. S. protective clothing. Such a Multipurpose fire fighting skid may be used in lieu of one foam tender/ DCP tender as described in 11. v) 2 nos. (excluding that in foam tender) for installation having largest tank as60m dia. A flammable gas detector is designed to give a warning of the presence of flammable gases or vapours in air.0 DETECTION SYSTEM AND ALARM Human beings are excellent fire detectors since they possess sense of smell. 12. Normally. 4000 kg for the DCP tender plus 500 kg for addi-tional requirement. well before they reach explosive concentrations. Foam compound: iii) 60. This is in addition to the charge loaded on tender). the detector provides visible and audible alarm signals. 77. 12. Fuel gas knock out drum Suction side of forced draft air blowers if located where hydrocarbon vapours may be present.000 lts. Process cooling tower top platform in the units having pressurised cooling water return. Light hydrocarbon pump stations if located below grade level.1 The following areas should be provided with hydrocarbon gas detectors: Light hydrocarbon pumps in process units.i) Dry chemical powder Monex or equivalent (Potassium-urea based as spare charge for DCP the DCP tender.1 AREAS TO DETECTORS BE COVERED WITH DETECTORS 12. As required based on shelf life. ii) Siliconised Sodium/ bicarbonate DCP powder for recharging of fire extinguishers. a number of mechanical. But since human senses are also unreliable due to the need for frequent rest and relaxation. A flammable gas detector can also be used for tracing leaks and checking that vessels or tunnels are gas free before entering. sight. (excluding that in foam tender) for installation having largest tank as79m dia. and touch. but frequently it performs a further function by initiating control action such as increasing ventilation or shutting off the source of gas.000 lts. electrical and electronic devices have been developed to mimic human senses in the detection of gases / smoke / heat and flame. LPG Horton spheres LPG pump house LPG bulk truck loading area LPG bulk wagon loading area 24 .1. of internal telephones which are exclusively meant for receiving fire/emergency calls only. These phones should have facilities for incoming calls only. For general communication a separate telephone should be provided. Telephone exchange should control and take care of this system. storage. telephone for contacting mutual aid parties shall be provided wherever possible. Gas compressor The exact location and number of points should be decided on need basis.P. The details of such a system should be worked out in association with civil defence authorities of the area. both tank truck and tank wagon gantry Additionally. alpha numerical pager system may be considered for group emergency communication. i) TELEPHONE Fire Station Control Room shall be provided with 2 nos. following areas may also be provided with suitable detectors: Extremely hazardous area in process units Floating Roof Tanks Computers/Process control rooms Unmanned electric substations / MCC rooms Cable galleries 13.0 COMMUNICATION SYSTEM Good communication is an essential element in the fire protection system of any plant. iv) FIRE SIRENS 25 . all departmental heads. The following communication systems should be provided in the Refinery/Process plants. iii) A.LPG spheres LPG filling sheds LPG pumps/compressors LPG loading/unloading. ii) PUBLIC ADDRESS SYSTEM Public address system should be connected to all control rooms. (AIR RAID PROTECTION) SYSTEM / PAGING Air raid communication system (with civil defence) should be provided in the control room of fire station. Hot line.- LPG bottling. 12.R.2 Following areas shall be provided with Smoke/ Flame / Heat detectors with alarm and/or system to actuate relevant fire suppression system: .1. repair sheds. Alternatively. security etc. administration building (all floors). Fire Station should also have a direct P&T telephone. to cover the critical areas with a control panel in the Fire station control room. by operating one or more pumps with the hydrant points kept closed as required to get the maximum operating pressure. flow and the motor load are in conformance with the design parameters. Sirens will be sounded three times for thirty seconds with an interval of fifteen second in between. walkways etc. DISASTER: Same type of siren as in case of Major Fire but the same will be sounded for three times at the interval of two minutes. For flow measurement suitable devices like ultrasonic instrument may be considered. Fire siren code should be as follows: 1. defects and damage. key personnel coordinating emergency operations should also be provided with walkie-talkie. In addition to routine daily checks/maintenance. Once a month each pump should be checked and tested and the shut off pressure observed and logged. v) WALKIE-TALKIE / WIRELESS All the Fire Tenders shall be provided with a walkie-talkie/ wireless system which will help in communicating with the people in case the other system fails. approach roads. vi) FIRE ALARM SYSTEM Fire Alarms Points shall be provided at suitable locations like access point. the following periodic inspection/testing shall be ensured.2 FIRE WATER RING MAIN The ring main should be checked once a year for leaks etc. ALL CLEAR (For fire): Straight run siren for two minutes.1 i) ii) FIRE WATER PUMPS Every pump should be test run for at least half an hour minimum two times a week. 5. 4. 3. 26 .The Fire siren/s should be located suitably to cover the whole area with the operational control in the Fire station control room. These should be tested at least once in a week to keep them in working condition. hydrants. monitors. MAJOR FIRE: A wailing siren for two minutes. The ring main. iii) Once in six months each pump should be checked for performance. 14.0 FIRE PROTECTION SYSTEM -INSPECTION AND TESTING The fire protection equipment shall be kept in good operating condition all the time and the fire fighting system shall be periodically tested for proper functioning and logged for record and corrective actions. All fire main valves should be checked for operation and lubricated once in a month. 14. valves should be visually inspected every month for any pilferage. SMALL FIRE: No siren 2. TEST: Straight run siren for two minutes. The location should be conspicuously marked for proper identification. Besides. 14. This may be done by opening required number of hydrants/monitors depending on the capacity of the pump and by verifying that the discharge pressure. 14. This should include checking of expelled gas. 14. Deluge systems on LPG spheres and bullets should be tested at least once in every three months.4 FIXED FOAM SYSTEM Fixed foam system on storage tanks should be tested once in 12 months.14. 15. This shall include the testing of foam maker/ chamber. Piping should be flushed with water after testing foam system.0 FIRE FIGHTING ORGANISATION A full-fledged fire fighting organisation shall be provided. A typical organisation for the fire and safety department for a large size. Trailer mounted pumps should be test run at least once a week. serviced and periodically tested under operating conditions.8 DETECTORS The operability of detectors should be tested once in every three months. The complete System should be inspected for proper operation once every year (Ref relevant NFPA standard for details of inspection of various systems). six monthly. 14.7 COMMUNICATION SYSTEM Fire sirens should be tested at least once a week. Spray system in LPG bottling plant and in TEL Blending plant should be tested at least once in every quarter. Calibration of gas detectors using test gas should be done once in every six months or as per manufacturer's specification whichever is earlier. All other mobile equipment should be checked. testing and remedial/ corrective actions taken wherever necessary. Records shall be maintained of all maintenance.3 FIRE WATER SPRAY SYSTEM Fixed water cooling spray systems on storage tanks should be tested at least once in six months. The foam chamber should be designed suitably to facilitate testing of foam discharge outside the cone roof tank. MOBILE FIRE FIGHTING EQUIPMENT AND ACCESSORIES Foam tenders should be tested at least once a week. 14. DCP tender should be visually inspected every week. This should include running of pump and foam generation equipment.5 a) b) 14. All the fire hoses should be hydraulically tested at least once in six months. at least once a month. Refinery/Process Plant is given below: 27 . for proper performance.6 HALON/ITS PROVEN EQUIVALENT SYSTEM The systems should be checked as given below: Agent quantity and pressure of refillable containers should be checked. OFFICER OPERATION EACH SHIFT SR. d) Pipeline flange leak fire simulation facility e) Fire suits and breathing apparatus. Fire fighting refresher training shall be given periodically. 16.0 MUTUAL AID Refineries/process plants should have written mutual aid agreements with similar neighbouring industries fully detailing the responsibilities of the members of the scheme. A layout of typical fire training ground and a brief write up on the facilities in the training ground are given in Annexure-IV.0 FIRE PROTECTION TRAINING All the plant personnel shall be trained on fire prevention and fire fighting aspects.0 FIRE EMERGENCY PROCEDURES 28 . the minimum number of equipment and manpower and minimum quantity of consumables to be exchanged/loaned. 17. MANAGER/ SR. The fire crew belonging to the fire fighting department shall be given intensive training for the use of all equipment and in various fire fighting methods for handling different types of fires. A model agreement of mutual aid is given in Annexure . OFFICER FIRE MTC DY. 18. the procedures to be adopted. A chart showing the above arrangement shall be exhibited prominently at least in fire station.CHIEF/SENIOR MANAGER FIRE & SAFETY MANAGER FIRE PROTECTION MANAGER SAFETY DY. FIRE OFFICER & FIRE OPERATORS The Fire Protection / Fighting organisation shall be manned by personnel having suitable professional qualification & training. MANAGER/ SR.V. A fire training ground with the following minimum training facilities should be set up : a) Trench fire simulation facilities b) A small open top tank fire simulation facility c) Pan fire simulation facility. A mock fire drill should be conducted once in a month to rehearse the fire emergency procedure and to keep the fire fighting team trained and alert and facilities in top order. Following equipment must be available in the Control Room. Important activities of control room are communication. 19.1 LOCATION Fire station should be located at minimum risk area. Also. Passive fire protection measures as indicated below should be adopted wherever required. 19. (i) Telephones (2) Wireless sets/ walkie-talkie (with a dedicated frequency) (3) Hotlines to neighbouring industries/civil Fire Brigade (4) Fire Alarm system with central control in fire station 19. separators. operations.2 20.3 GENERAL: a) Fire Station should have 2 overhead storage tanks for foam compound storage. It should be spaced at a safe distance from any process plant and other hazardous areas. For details refer OISD-STD-118. in the LPG storage and bottling plants. mobilisation. up-keeping and maintenance. access and exits of the building should not be obstructed by other vehicles. Substation/ transformer yard/ bays/ d) Fire Seals in underground sewer system / Flare Knock out Drums e) Impounding Basins/Dyke Walls f) Lightning Arresters g) Pressurisation of Enclosure 29 . b) Control room should have portable emergency lights. Fire station control room should be close to parking bay for fire appliances and should have good view of vehicles parked. When planning for new fire station. adequate land should be provided for parking and manoeuvring of fire appliances. c) Fire Station should have prominently located pressure gauge showing fire water network pressure.0 FIRE STATION/CONTROL ROOM Fire Station Control Room is of critical importance as it is main co-ordinating centre between the emergency site and response crew. The fire emergency procedures including fire fighting plan should be prepared for fighting fires in the process units. so that during emergency refilling is not delayed. warehouse and building fires etc. The location and construction of control room should therefore be suitable for these activities. product loading gantries. 19. COMMUNICATION: Reliable communication system is must for supporting effective fire service dept.0 PASSIVE FIRE PROTECTION MEASURES Although adequate fire protection is provided in an installation. electrical fire. a) Fire Proofing of structural members b) Spark Arresters and Flame Arresters c) Fire Separation Walls in concealed space/Electrical cable galleries. in and around tanks.Each installation shall prepare a detailed "Fire emergency procedures" manual for use by the organisation. 2001 CLEAN FIRE EXTINGUISHING SYSTEM API .1976 10) FIRE PROTECTION MANUAL (PART-II) OF TAC 11) TAC BUILDING REGULATIONS 12) 12) TAC REGULATIONS FOR ELECTRICAL EQUIPMENT OF BUILDINGS 13) 13) MODEL CODE OF SAFE PRACTICES .2001 FIRE PROTECTION IN REFINERIES PETROLEUM RULES . earth leakage circuit breakers. K. ) 14) INTERNATIONAL SAFE PRACTICES OF OIL INDUSTRY 15) IS:3844-1966 CODE OF PRACTICE FOR INSTALLATION OF INTERNAL FIRE HYDRANTS IN MULTISTOREY BUILDING 16) OISD-STD-142 INSPECTION OF FIRE FIGHTING EQUIPMENT & SYSTEMS 17) OISD-STD-154 SAFETY ASPECTS IN FUNCTIONAL TRAINING 30 .h) Venting Facilities of process equipment i) j) I) Electrical Relays and Fuses.THE INSTITUTE OF PETROLEUM (U. neutral current circuit breaker Fire retardant coatings and tapes for cables Flame proof and flame resistant electrical enclosure k) Fire resistant low smoke insulation cable REFERECES 1) 2) 3) 4) 5) 6) 7) 8) 9) NFPA 11 STANDARD FOR LOW EXPANSION FOAM SYSTEMS NFPA 11 A STANDARD FOR MEDIUM & HIGH EXPANSION FOAM SYSTEMS NFPA 13 STANDARD FOR THE INSTALLATION OF SPRINKLER SYSTEMS NFPA 15 STANDARD FOR INSTALLATION OF WATER SPRAY SYSTEMS NFPA 17 DCP SYSTEM NFPA 20 STANDARD FOR INSTALLATION OF CENTRIFUGAL FIRE PUMPS NFPA . in such case cooling water required at the rate of 1 lpm/m2 of tank shell area shall be215 m3/hr.000 m3 79 mtrs.4 mtrs. Total cooling water = 858 m3/hr c) Foam water requirement: Water flow required for applying foam on a largest tank burning surface area. DESIGN BASIS The fire water system in an installation shall be designed to meet the fire water flow requirement to fight two major fires simultaneously. of tanks Capacity of each tank Diameter of each tank Height of each tank b) Cooling water requirement: Cooling water rate @ 3 lpm/m2 of tank shell area for tank on fire.5 m2 e) Fire water for supplementary hose stream based on 4 hydrant streams + 1 water monitor. the Seal area Foam solution rate @ 12 lpm/m2 = = = d) // x79x0. as indicated below: 2.4 x 3 10721 lpm 643 m3/hr Assuming that second tank is located within the tank dyke at a distance more than 30 mtrs from the tank shell. 4x36 m3/hr + 1x144 m3/hr = 288 m3/hr Total water required: 31 . 2. Cooling water required = = = = = = = = 120.000 m3 2 60. 14. For floating roof tank of 79 mts diameter.1 FLOATING ROOF TANKS PROTECTION a) Data : Total storage capacity in one dyke area No. Therefore. II x79x14. FIRE WATER DEMAND Various areas which can be under fire shall be considered and fire water demand for each area shall be calculated based on design basis.ANNEXURE-1 TYPICAL EXAMPLE FOR CALCULATION OF FIRE WATER FLOW RATE 1.8 2382 lpm 143 m3/hr = 198. 5)2 x 5 ---4 = = 5522 lpm 331 m3/hr 288 m3/hr d) Fire water for supplementary hose stream = 32 .2 CONE ROOF TANKS PROTECTION a) Data: Total storage capacity No. of tanks capacity each. Diameter of each tank Height of each tank 858 m3/hr 143 m3/hr 288 m3/hr 1289 m3/hr = = 50.5 x 12 x 3 4241 lpm 254 m3/hr Cooling water required for other tanks at the rate of 3 lpm/m2 of shell area for tanks falling within (R+30) mtrs from centre of tank on fire.Tank cooling Foam application Supplementary stream Total 2. = = Total cooling waterrate 3 x 254 m3/hr 762 m3/hr = 254 + 762 = 1016 m3/hr c) Foam water requirement (for 1 tank only) @ 5 lpm/m2.000 m3 4 with 12500 m3 = = 37.5 mtrs 12 mtrs b) Cooling water requirement: Cooling water rate area for tank on fire Cooling water required = 3 lpm/m2 of tank shell = = = // x 37. Foam solution rate = // x(37. 4 Hose stream requirement Total water requirement = = 1655 m3/hr 288 m3/hr 1923 m3/hr LPG RAIL WAGON LOADING GANTRY PROTECTION a) Data: Total No.e) Total water required : Tank cooling Foam application Supplementary stream Total 1016 m3/hr 331 m3/hr 288 m3/hr 1635 m3/hr 2.3 LPG SPHERES AREA PROTECTION a) Data: No. 33 . of loading points Consider 20 loading points on each side centre to centre rail spacing Length of Rail gantry Width of cooling b) Cooling water requirement: Divide the whole areas into 4 segments and consider 2 segments operating at any time : Water rate lpm = 576 m3/hr = 2x40x12x10 = 9600 = = 160 mtrs 12 mtrs = = 40 7 mtrs. of sphere in one area Diameter of each sphere b) Cooling water requirement : water rate for cooling = = = Considering other 2 spheres located within (R+30) mts from centre of sphere and fire cooling water rate for 3 spheres = // x172 x 10 lpm 9079 lpm 545 m3/hr 3 x 545 m3/hr = = 3 17 mtrs = c) d) 2. II = = 9600 x 1 lpm 576 m3/hr 288 m3/hr 864 m3/hr = 120 x 80 m2 Consider a 10 mt x 10 mt portion of process unit area on fire.III Water required for portion of unit area provided with fixed spray system (Extreme Hazardous Area) Area assumed Water rate Cooling water required water for supplementary hose stream Total cooling water required = = = = = 1000 m2 10 lpm/m2 600 m3/hr 288 m3/hr 888 m3/hr 34 . Water rate = = water for supplementary hose stream Total water rate Alternative .5 Supplementary hose requirment: Total water requirement = = 288 m3/hr 864 m3/hr PROCESS UNIT PROTECTION For process unit protection in case of fire. water is to be applied using fixed water monitors and hose lines. Provide water cover over an area of 30mtsx30mts at the rate of 10 lpm/m2. Water rate = = water for supplementary hose steam Total water rate = = 900x10 lpm 540 m3/hr 288 m3/hr 828 m3/hr Alternate . Unit blocks separation is by 30 mts. Three following alternatives are considered for fire water rate. Alternate-I Total unit area Consider water rate @ 1 lpm/m2 on area basis.c) d) 2. II & III Design flow rate = 888 m3/hr 3.0 TOTAL DESIGN FIRE WATER RATE Fire water rates for 5 cases are given below: i) ii) iii) iv) Floating roof tank protection Cone roof tank protection LPG sphere protection LPG rail wagon loading gantry protection Process unit protection = = = = 1289 m3/hr 1635 m3/hr 1923 m3/hr 864 m3/hr v) = 888 m3/hr Total design fire water rate is the sum of water rates for 2 major fires: Design fire water rate m3/hr = 1923 m3/hr + 1635 = Say = 3558 m3/hr 3700 m3/hr 35 .Considering the maximum water under alternative I. CONE ROOF TANK PROTECTION: i) Data : Total Storage capacity in one dyke area Number of tanks Diameter of each tank Height of each tank ii) = = = = 50. Foam solution rate = // x (37. 36 .000 m3 4 37.5 mtrs 12 mtrs The quantity of foam compound shall be calculated as follows : Consider foam solution application @ 5 lpm/m2 for the liquid surface of the single largest cone roof tank in the dyke area.4 lpm 4446 lts Total foam compound required for cone roof tank area Protection: Foam compound required for Cone Roof Tank = 10790 lts.5) 2 --------------------X 5 4 5522 lpm 5522 x 3 / 100 166 lpm 166 x 65 10790 lts = Foam compound required = = Foam compound quantity for 65 minutes = = iii) Consider one portable foam monitor of 2400 lpm foam solution capacity : 3% Foam compound required Foam compound required for 65 minutes = = 72 lpm 4680 lts iv) Consider 2 hose streams of foam with a capacity of 1140 lts/min of foam solution capacity 3% Foam compound required Foam compound required for 65 minutes v) = = 68.ANNEXURE .II TYPICAL EXAMPLE FOR CALCULATION OF FOAM COMPOUND REQUIREMENT 1. 4406 lts.5 lpm 4647 lts iii) Foam Compound required for 1 foam monitor and 2 hose streams as calculated for cone roof protection 1 Foam monitor 2 Hose streams 4680 lts 4446 lts iv) Total foam compound required for floating roof tank area Protection: Foam Compound required for Floating Roof Tank Foam compound required for 1 foam monitor Foam compound required for 2 hose streams Total required Say. FLOATING ROOF TANK PROTECTION i) Data: Total Storage Capacity in one dyke No.4 mtrs Consider foam solution application rate of 12 lpm/m2 of seal area of the single largest floating roof tank in the dyke area : Seal area = = Foam solution rate = = 3% Foam Compound required Foam Compound required for 65 mins. of Tanks Capacity of Each Tank Diameter of each tank Height of each tank ii) = = : : 4680 lts.000 m3 79 mtrs 14. 4647 lts 4680 lts 4446 lts 13773 lts 14000 lts 37 .8 198. = = // x79x0. = = = = = 120. 19876 lts.5x12 lpm 2382 lpm 71.5 m2 198. 20000 lts.000 m3 2 60.Foam Compound required for 1 Foam Monitor Foam Compound required for 2 hose streams Total Say 2. e 40000 lts. Similarly for 2 floating roof tank dyke areas with largest tank diameter of 79 mtrs. On the lines of the above example foam compound requirement should be calculated for various dyke areas. foam compound required works out as 2x20000 lts i. for 2 cone roof tank dyke areas with largest tank diameter of 37.5 mtrs in each area. foam compound required works out as 2 X 14000 lts i. For example. 38 . in each area.e 28000 lts. Requirements to fight major fires in two dyke areas (with maximum foam compound rates requirements) should be added. to arrive at the total requirement of the installation.3. MIN. mt. Boom movement – 360 degrees Foam/water monitor capacity 5000 to 6000 lpm Pump capacity – 5000 to 6000 Lts/min.4 sq. 25 and 40 kg/second at operating pressure of 14 kg/cm2 Monitor throw . I. Extinguishing Articulated boom Of 30 mts height Throwing distance . DCP Tender g - - For gas Fires and Spill fires 39 .ANNEXURE . at 10 kg/sq. To supply form to spill fires - 10 ton 3000 lts.III BROAD SPECIFICATIONS FOR FIRE FIGHTING EQUIPMENT N o .5 kg/sq.cm g & 2500 lts/min @ 10 kg/sq.cm g - - Foam/water monitor of capacity 2500 to 2800 lts/min – 1 No. Equip ment Foam Tender - Broad Specification Capacity And Size DieselEngine Chassis with compatible PTO Unit payload Foam compound Tank Water tank Pump capacity Suitabi lity To supply Foam Solution to Fixed foam System.Horizontal : 100-120M Height : 65-75mt. 3200 lpm@ 8. II. Hydraulic Platform with articulated or telescopic arm Diesel Engine Chasis with compatible PTO Unit .40 to 50 mtrs For foam application on oil fires For fire fighting Of tall columns And inaccessible area - - - For rescue III. 2600 lts.HP280 Foam generating equipment Cage area – 1.g Remote operation from rear of truk Operation to suit water Connection from hydrants Diesel engine chassis –payload :13 2 spheres of 2000 kg DCP each Expellent gas system (Nitrogen gas cylinders 28x50 lts at 140 kg/cm2 g Automatic regulator for output and range DCP monitor with range 15. cm. g - X. Emergency Rescue Tender - Rescue equipment Breathing equipment Protective clothing First Aid Equipment Foam compound storage cpacity 1000 litres Water/foam monitor of capacity 25000 to 3200 lts/min Water-cum-foam monitor of capacity 2500 to 3200 lts/min. nozzle etc. Fire hoses -2 ½” Fire jeep - Reinforced rubber lined hoses type “A” or “B” as per IS 636 Standard design with two-way radio Communication facility - XI. Trailer mounted Hollow jet water Monitor Mobile fire Trailer pump - Monitor capacity 2500 to 3200 lts/min - IX. XIII. - For rescue Operations V. - - Pump capacity : 160 lts/min VIII. Ambulance Other accessories Foam making branch pipes. Foam Tank Trailers with Water-cumFoam monitors Trolley mounted Water-foamMonitors Foam Nurser (Trailor mounted foam supply tank) - For spill fires VI. - Medical first aid equipment As per standard specifications Lts/min at 7 kg/sq. Foam Compound storage 4500 lts. - - For oil fire For hot work To supply Foam compound During fire fighting To fight-fires at inaccessible places As a booster Pump Fire water use from additional source General fire Fighting Towing trailer Type equipment General vigilence Medical aid For fire Fighting VII.cm. - - - XII. - Pump capacity 1800 to 2250 Lts/min at 7 kg/sq.cm.IV. g - 40 . IV FIRE TRAINING GROUND . 1 LAYOUT OF TYPICAL FIRE TRAINING GROUND 2.1 Fig.0 LAYOUT OF TYPICAL FIRE TRAINING GROUND A typical layout of a fire training ground is shown in fig.0 DETAILS OF FACILITIES IN TRAINING GROUND 41 .ANNEXURE .FACILITIES 1. 2. Probability of LPG fires during bottling. there are tall structures such as columns/vessels.4. 2.1. Such fires can be controlled with the following arrangements a) b) Isolate the oil supply Cooling the area as well as surroundings with water spray & facilities should be provided for such simulations. loading/unloading of cylinders is more. 2. To approach to the isolation valve. Facilities may be provided to simulate such fires. Facilities for wagon gantry fire: Gantry fires are difficult to control due to rapid spreading of fires all around the gantry. 2. sometimes hydrocarbon liquids get released from the process equipment and accumulate in the open areas/ pit. personal protective equipment with water screen is necessary. To tackle fires on such equipment the most important activities are isolation and cooling the equipment as well as surrounding area. To tackle such fires. Facility for storage tank fire Storage tanks are provided with fixed foam line connection and fixed cooling water system to fight tank fires. Generally.3 Facility for pipeline fires: In the refinery equipment are connected by pipelines and to rundown the products from the process units to storage tanks. To fight such fires. Chances of fires due to leakage of LPG in the process unit is less as it is processed in closed system. Facilities may be provided to simulate all such actions. most difficult isolation is on the outlet side. Training ground may have a tank with fixed foam installation with isolation valves on product lines. training facility may be installed. 2.6 Facility for high elevation column fire In the refinery. These pipes can leak at flange joints and result in a fire. the facility may be provided on the ground.Details of different facilities in the fire trainingground are described below.5 Facilities for LPG fire LPG is produced in the refinery and stored in containers from where it is despatched to the market.2 Facility for pit fire: During operation of the refinery. isolation of inlet side of the equipment is not much difficult. 2. 42 . The foam is to extinguish the fire and cooling water is to prevent spreading of fire in the neighbouring tanks. The most dangerous aspect in LPG fires is explosion of bullet/cylinders. 43 . 2 Nos.Extn 3346 SN Mukherjee Mgr. liters 1 No. AVAILABLE 1. 44 .Extn 3701 Bhonde JN Sanghvi 5563151 Ext. 3(FB-2.6096 IG 5558553 Ingole SN Mukherjee 5563151 Ext. 7. nos. Ext. 5513647 JS Pannu AD Ghorpade 5513647 5555991 JN Sanghvi Ch. Dhobley. nos. 2. 8000 Ltrs. 8000 liters 10000 liters 1 no.R. Foam making 2 nos. C. Foam Generator 8. of 30 m. nos. (FB-5.ANNEXURE-V SHEET-1 TYPICAL AGREEMENT OF MUTUAL AID A typical chart showing mutual aid agreement is given below: COMPANY Contact Personnel During Office hours BARC BPCL BPT HPCL R. 10. 10 Nos 2 7650 nos. D. F&S Mgr. Branch pipes 5. Fire Serv 5563151 PP Fire Bhonde Officer 5555991 5558553. 5563151.20) 15 3 1 2 nos. Hoses 12 nos. Adaptors 3(H).10) 2 Nos. Branch Pipes 2 nos.6051 AD Ghorpade 5510072 EQUP. 3. of 50 ft.Chief AA Raichur Fire Officer Sr. P 12 nos. 3 (F) 6. of 30 m 2 Nos. F&S Mgr. 4. Foam compd.Extn 2261 IG Fire 5558557 PP 5558553 Ingole Officer After Office Hrs Fire Control Room Fire Control Room 5518647 5555991 RR Dhobley AA Raichur 5550846 5132129 JS Pannu 5511031 Fire Control Room 5563151. Fog Nozzles 2 nos. 222 C After Office Hrs S Choudhary 6110779 Fire Control Room Fire Control 5517387 5552614 SJ Sharma 5568032 Theo D'Souza C Subba Rao SV Kale 5519426 MS Ganapathy 6236212 VP Barve 5564007 RL Dutta 5550560 EQUP. 5 Nos. 8 Nos. 11. 12. 14.of 22. Trailer Pumps 14.5m 6Nos 15 Nos. 1 no. 1 (M) 1 (F) 1 No. 20 Nos. 1 No. Ambulance 8 Nos. AVAILABLE 1.of 15m 4 Nos. 8 Nos. 6 Nos. C.Engg. Air breathing apparatus 1 No. 1 (M) 1 (F) 100 Liters 5 Nos. available if it can be spared 13. 2 Nos.of 22. 2 2 Nos.1 no. 4 Nos. 2 Nos. EXT.5m 3 Nos. 1 Nos. 9. 6 Nos. CO2 10. 8. 5 Nos. Canistor Gas Masks 12. 1 No. Foam tender will be made 1 No.Safety 5517387 SV Kale Fire Officer 5552614 Theo D'Souze 5564007 Ext. of 15 m 4 Nos. Subba Rao 5563320 S Choudhary 5562818 Ext 256 SJ Sharma Ch. 5. 2 Nos. 10Nos. 2(FB-2-10Nos) 1 (M) 1 (F) 10 Nos. 13. D. 1 No. 8 Nos. 7.of 15 m 20 Nos. 1 No. P EXT. 3 Nos. 4. 9. CO2 Air breathing apparatus Canistor Gas Masks Foam tender Trailer Pumps Ambulance 25 Nos. 2 (M) 2 (F) 10 Nos. 1 No. 4 Nos. 6 Nos. 1 No. 4 Nos. 1 No. 6 Nos. 20Nos. 10. 1 No. 1 No. no. 45 . 3. 2. 2 nos. 11. IOBL POLYCHEM RCF SP OIL RMF HPCL Contact Personnel During Office Hrs. Hoses Branch Pipes Fog Nozzles Foam making Branch pipes Adaptors Foam Generator Ext. The same may be achieved by 5 nos.1 4 39704 lpm 2382 m3/hr.ANNEXURE-VI Typical Example of Fire Case in a large Floating Roof Tank after sinking of floating roof: Example for calculation of Foam Requirement for Floating Roof tank with Portable Monitors: DATA 1.** Foam Compound Requirement = = say. Diameter of Tank Type of Roof Foam Application Rate Foam Solution Requirement : : : = 79 m Floating Roof 8. 3. = 39704 x 3/100 1191. 46 . 1191 lpm 1191 x 65 Foam Compound Requirement = for 65 minutes with 3% concentration = 77415 litres ** If two major fire occurs in an installation with roof sinking case as one of them. = This much quantuties has to be trown over to sunken roof area with the help of external long range high volume monitors from the road side periphery of the tank farm. In design rate calculation in Ann-I. sinking of floating roof has not been considered.x 8. however. 2400 m3/hr = = say. 2. of 2000 gpm such monitors.1 lpm (as per NFPA-11) // x 79x79 ---------.12 lpm. installation may consider sizing the fire water network around tank farms to take up such load so that long range monitors can be fed from this network by diverting other water availble in installation to tank farms in such emergency. 5 M2 (Considering a flexible seal area of typically 300 mm) Rate of Foam application @ 18 LPM/M2 = 1341 LPM Total Foam soln. of Foam) TYPICAL DIAGRAM OF AUTOMATIC ACTUATED FOAM FLOODING SYSTEM 47 . The provision of audio-visual alarms for different operating parameters can also be coupled with the system. In case of fire. length) laid along the tank perimeter. dia is given below: DESIGN CRITERIA : Rimseal area of Tank : // X 79 X 0. Film Forming Fluro Protein Foam (FFFP) type concentrate is normally used in the system. of Modular unit required for the tank = 7 (considering a foam vessel of 150 lts. The system is mounted on the roof of the tank. The foam aspirating nozzles are mounted on the line at an interval of 2. Total nos. An example of design calculation of the system for a Floating roof tank of 79 mts.5 mts. which is kept charged with nitrogen. required in 40 secs. = 894 lts. foam is applied for a period of 40 seconds. The premix foam is contained in a vessel which is kept charged with nitrogen through a nitrogen cylinder.capacity containing 135 lts. tube ruptures and the pressure drop triggers the foam discharge.3 = 74.Annexure-VII AUTOMATIC ACTUATED FOAM FLOODING SYSTEM FOR LARGER FLOATING ROOF TANKS The automatic actuated foam flooding system is a system designed to automatically detect and extinguish the floating roof tank rimseal fire at its incipient stage. The system consists of a detector network normally thermoplastic tubing type. The System is designed for minimum foam application rate of 18 lpm/m2 of rimseal area. For effective control. The system consists of a long foam line (typically available in 40 Mts. MECHANICAL FOAM: It is produced by mechanically mixing a gas or air to a solution of foam compound (concentrate) in water. 4. The most common ingredients used for chemical foam are sodium bicarbonate and aluminimum sulphate with stabilizer. depending on the requirement and suitability. poor cooling.1 TYPES OF LOW EXPANSION FOAM: PROTEIN BASE FOAM: 48 . 2. which when applied in correct manner and in sufficient quantity. petrochemical and other chemical industries. This foam has limited use in controlling hydrocarbon liquid fire because of it's limitations w. poor resistant to hot surface/radiant heat etc.1 CHEMICAL FOAM: When two or more chemicals are added the foam generates due to chemical reaction. It is suitable for hydrocarbon liquid fires and is widely used in oil refinery.3 HIGH EXPANSION FOAM: Foam expansion ratio vary from 501:1 to 1500:1. This foam has also very limited use in controlling hydrocarbon liquid fire because of its limitations w.0 TYPES OF FOAM COMPOUND Two Types of foams are used for fighting liquid fires: 2.t.2 3. 2.ANNEXURE-VIII BRIEF DESCRIPTION OF FIRE FIGHTING FOAM 1. 3.0 4. It is used for protection of hydrocarbon gases stored under cryogenic conditions and for warehouse protection. The chemical foam is generally used in Fire extinguishers. oil platforms. forms a compact fluid and stable blanket which is capable of floating on the surface of flammable liquids and preventing atmospheric air from reaching the liquid. poor cooling. poor resistant to hot surface/radiant heat etc. MEDIUM EXPANSION FOAM: Foam expansion ratio vary from 51:1 to 500:1 as typically produced by self aspirating foam branch pipes with nets. Various types of foam concentrates are used for generating foam. usually between 750:1 to 1000:1 as typically produced by foam generators with air fans.t.r.r. LOW EXPANSION FOAM: Foam expansion ratio may be upto 50 to 1. but usually between 5:1 to 15:1 as typically produced by self aspirating foam branch pipes. Each concentrate has its own advantage and limitations. The low expansion foam contains more water and has better resistant to fire. The brief description of foam concentrates is given below.0 MECHANICAL FOAM COMPOUND: Mechanical foam compound may be classified in to 3 categories based on it's expansion ratio.0 FIRE FIGHTING FOAM: Fire fighting foam is a homogeneous mass of tiny airor gas filled bubble of low specific gravity. which suppresses the vapour and extinguishes the fire. 4. foaming agent and stabilizer. The foam has quick fire knock down property and is suitable for liquid hydrocarbon fires.3 AQUEOUS FILM FORMING FOAM (AFFF): The foam concentrate mainly consists of fluoro carbon surfactants. The concentrate is available for induction rate of 3 to 6% and the shelf life is more than 15 years. The 3% induction rate is suitable for liquid hydrocarbon fires and 5% for water miscible solvents. 49 . The concentrate is available for induction rate of 3 to 6% and the shelf life is similar to that of protein base foam. foaming liquid designed specially for fire protection of water soluble solvents and water insoluble hydrocarbon liquids. The foam is also suitable for deep pool fires because of superior drainage rate and more resistive to hot fuels/radiant heat.4 MULTIPURPOSE AFFF: Multipurpose AFFF concentrate is synthetic. This can also be used with non aspirating type nozzles. but not on water miscible liquids.2 FLUORO PROTEIN FOAM: This is similar to protein base foam with fluro-chemical which makes it more effective than protein base foam. It produces very fluid foam. When applied it forms foam with a cohesive polymeric layer on liquid surface. This can be used with fresh water as well as with sea water. The effectiveness of foam is not very good on deep pools or low flash point fuels which have had lengthy preburn time unless applied very gently to the surface. The suitable stabilizer and preservatives are also added.5 FILM FORMING FLOURO PROTEIN (FFFP). As the foam has poor drainage rate. but not on water miscible liquids. 4. which flows freely on liquid surface. The foam is very effective on deep pools of low flash point fuels which have had lengthy pre burn time. The concentrate forms a thick foam blanket and is suitable for hydrocarbon liquid fires. The aqueous film produced suppresses the liquid vapour quickly. the effectiveness is limited on deep pool fires of low flash point fuels which have lengthy pre burn time. The concentrate forms a thick foam blanket and is suitable for hydrocarbon liquid fires. The shelf life of concentrate is not less than 10 years. 4. FFFP combines the rapid fire knock down quality of conventional film forming AFFF with the high level of post fire security and burn back resistance of flouro protein foam. The shelf life of concentrate is 2 years.The foam concentrate is prepared from hydrolyzed protein either from animals or vegetable source. 4. This can also be used with non aspirating type nozzles. The concentrate is available for induction rate of 3 to 6%. This can be used either with fresh water of sea water. 5 to 3%. The foam is susceptible to easy break down by hot fuel layers and radiant heat. This can also be used with non aspirating type nozzles. 50 .0 TYPES OF MEDIUM AND HIGH EXPANSION FOAM: Synthetic foam concentrate is used with suitable devices to produce medium and high expansion foams. This can be used on hydrocarbon fuels with low boiling point. The induction rate in water may vary from 1. The foam is very light in weight and gives poor cooling effect in comparison to low expansion foams.The concentrate can either be used with fresh water or sea water. The foam is suitable for hydrocarbon liquid fires including deep pool fires of low flash point fuels which have had lengthy pre burn time. 5. The concentrate is available for induction rate of 3 to 6% and the shelf life is not less than 5 years. Many of the low expansion foam concentrate can also be used with suitable devices to produce medium / high expansion foam. 51 .