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www.sefindia.org :: View topic - PIPE RACK DESIGN GUIDELINES http://www.sefindia.org/forum/viewtopic.php?t=8219 www.sefindia.org STRUCTURAL ENGINEERING FORUM OF INDIA [SEFI] Search Subscriptions Digest Preferences Profile FAQ Search Memberlist Usergroups Log in Register Security Tips Log in to check your private messages PIPE RACK DESIGN GUIDELINES www.sefindia.org Forum Index -> SEFI General Discussion View previous topic :: View next topic Author nestlejin SEFI Member Posted: Tue Aug 31, 2010 2:37 pm Message Post subject: PIPE RACK DESIGN GUIDELINES Dear all, Joined: 16 Jul 2010 Posts: 15 Given web link is very usefull to understand pipe rack design http://www.civildesignhelp.info/pr.html In this page I will talk about the pipe rack design philosophy. Pipe rack is the main artery of any plant. This carries the pipes and cable trays (raceways) from one equipment to another equipment within a process unit (called ISBL piperack) or carries the pipe and cable trays from one unit to another unit (called OSBL pipe rack). Some times you will also find the AIR COOLED HEAT EXCHANGERS on the pipe rack. There are different types of pipe rack: Continuous Piperacks (conventional pipe rack) system Non-continuous Piperacks system Modular Pipe rack Conventional / Continuous Pipe rack Continuous Piperacks (conventional pipe rack) system: This is essentially a system where multiple 2-dimensional (2D) frame assemblies (commonly called bents), comprised of two or more columns with transverse beams, are tied together in the longitudinal direction utilizing beam struts (for support of transverse pipe and raceway elements and for longitudinal stability of the system) and vertical bracing to form a 3D space frame arrangement. Piperacks supporting equipment such as air-cooled heat exchangers must utilize the continuous system approach. Step-1: Data collection for pipe rack design: Due to the “fast track” nature associated with most of the projects, often the final piping, raceway, and equipment information is not available at initiation of the piperack design. Therefore, as a Civil/Structural Engineer, you should coordinate with the Piping group, Electrical, Control Systems, and Mechanical groups to obtain as much preliminary information as possible. When received, all design information should be documented for future reference and verification. In the initial design, the Engineer should use judgement when applying or allowing for loads that are not known, justifying them in the design basis under "Design Philosophy" (a part of your calculation) 1 of 11 8/23/2011 3:05 PM concrete structures and foundations. Underground drawings that show the locations of buried pipes. such as live load. s = Spacing of piperack bent. the structural design should be checked against these assumed initial load parameters and revised as required. Under most normal conditions. access and maintenance requirements.s x p x d). Because of these considerations. Piperack bent spacing and elevation of support levels in the transverse direction . and unusual piping or electrical configurations. Unless specifically explained in the project design criteria. as applicable. This corresponds to an equivalent load of 6 in (150 mm) lines full of water covered with 2 in (50 mm) thick insulation. Pipe rack construction material (Steel. Elevation of longitudinal beam struts and locations of vertical bracing. Electrical and control systems drawings showing the routing and location of electrical and instrumentation raceways and/or supports. Please note that.0 kPa should be used for single tier raceways. should be obtained from the vendor drawings. operating. an assumed minimum uniform pipe load of 2.php?t=8219 The following should be reviewed for design information: Plot plans and equipment location plans 3D model showing piping layout. and concentrated loads should also be applied for any anticipated large pipes. ladders. e. and test (if the equipment is to be hydro-tested on the piperack). and the magnitude and direction of loads being transmitted to the piperack. such aslarge valves. Pre-cast concrete) shall be as per project design criteria. 2 of 11 8/23/2011 3:05 PM . Self weight of Pipe rack (D): The weight of all structural members.The equipment weight should include the dead weight of all associated platforms. Piping orthographic drawings. Where consideration of uplift or system stability due to wind or seismic occurrences is required. When the actual loads and locations become known. etc. and location of pipe bridge. Vendor prints of equipment located on the rack. A concentrated load should then be added for pipes that are 12 in (300 mm) and larger in diameter. empty. an assumed minimum uniform load of 1. Startup. Cast-in-situ concrete. air coolers and exchangers.www. The hydro-test loads do not normally need to be considered concurrently with the other non-permanent loads. p = pipe weight considered (kPa). in the area of the piperack. cable tray layout. Loading due to hydrostatic testing of lines should be considered in the design if applicable. and thermal. use 60% of the design gravity loads as an "all pipes empty" load condition.PIPE RACK DESIGN GUIDELINES http://www. should be considered in the design of the piperack. multiple lines will not be simultaneously tested. including erection. Coordinate the testing plan(s) with Construction.org :: View topic . and spaced on 12 in (300 mm) centers. expansion loops. earthquake. if any. in order to fully understand how such loads will be applied to the piperack structure. duct banks. as the project develops. d = pipe diameter W = pipe concentrated load.sefindia. Electrical Tray and Conduits (D): Electrical and control systems drawings and/or the project 3D model should be reviewed to determine the approximate weight and location of electrical trays.0 kPa should be used for preliminary design of piperacks. wind.g.sefindia. mounting locations and details. This assumption should be verified based on coordination with the Piping Group. including fireproofing.Special Loads: Special consideration should be given to unusual loads. and instrumentation commodities. and/or the Piping Group as necessary. Weight of Equipment on pipe rack (D): Equipment weights. Step-2: Design loads consideration: Following loads are to be considered for the pipe rack design: Piping Gravity load (D): In the absence of defined piping loads and locations. no allowance or provisions should be made for future additions for pipe or raceway space and related loading. Unless the weight of the loaded raceways can be defined. and walkways. conduits. Typical practice is to permit an overstress of 15% for the hydro-test condition. the hydro-test condition will not normally govern except for very large diameter pipes.The vendor prints should include the equipment layout.org/forum/viewtopic. The concentrated load P should be: P =(W .. may be considered as resisted by the total beam section.sefindia. Longitudinal anchors may be located only at anchor bays. is assumed for piperack design.. raceways. and buoyancy. Snow Load (S): Snow load to be considered on cable tray and on large dia pipes. electrical trays. such as provide horizontal bracings at the load locations.e. Anchor and Guide Loads (Ta): Piperacks should be checked for anchor and guide loads as determined by the Pipe Stress Group.www. It may be necessary to use horizontal bracing if large anchor forces are encountered. For non-continuous pipe rack systems.If the beam section is inadequate to take care of this torsional force. i. Generally. whichever is larger. or to anchor most pipes on one braced support.sefindia. and deflection checks. Vertical. Wind Load (W): Transverse wind load on structural members. in order to provide for a nominal unbalance of friction forces acting on a pipe support. and longitudinal seismic forces generated by the pipes. Please note the following: Earthquake load is a factored load.0 kN acting at midspan of each bent transverse beam (refer project design criteria). the following unfactored load combinations (ACI 318) shall be used: 3 of 11 8/23/2011 3:05 PM . applied to the top flange of the beam. Friction between piping and supporting steel should not be relied upon to resist wind or seismic loads.org/forum/viewtopic. I have refered here some load combinations.0 kN). it is normally preferred to either have the anchors staggered along the piperack so that each support has only one or two anchors. Please note that.PIPE RACK DESIGN GUIDELINES http://www. However. when anchor and guide loads are not known. Friction Loading (Tf): Friction forces caused by hot lines sliding across the pipe support during startup and shutdown are assumed to be partially resisted through friction by nearby cold lines. This load shall be calculated per project approved design code and project design criteria. use only the non-friction portion (anchor and guide portion) of the thermal loads. For initial design.php?t=8219 Live Load (L): Live load (L) on access platforms and walkways and on equipment platforms should be considered. transverse. Friction loads are considered to be self-relieving during wind and earthquake and should only be combined with anchor and guide loads when wind or earth-quake loads are not considered. For load combinations that include wind or earthquake loads. large dia pipes vertical drop (if any) and equipment only. transverse.equipment. Hydrostatic test loads need not be combined with wind and earthquake loads unless there is a reasonable probability of the occurrence of either of these loads during hydrostatic testing. and longitudinal directions should bedetermined in accordance with the project design criteria. the effect of torsion must be addressed. Pipes must be evaluated for seismic loads under both full and empty conditions and then combined with the corresponding gravity loads. as applicable. (say ~ 5. Guide loads are usually small and may be ignored until they are defined by the Pipe Stress Engineer. piping. use a longitudinal anchor force of 5. alternatives to be considered.3: Load Combinations and allowable deflection of pipe rack: You need to create the load combinations per your project design criteria. sliding. Step . stability checks against overturning. and ladders should be determined in accordance with project approved design code. Earthquake Loads (E): Earthquake loads in the vertical.org :: View topic . For conventional pipe rack systems. cable tray vertical drop (if any). you need to consider 100% snow load on top tier and 50% on other tier of pipe racks. piping may be transversely guided or anchored at both cantilever frames and anchor bays. all friction forces and anchor forces with less magnitude. supported equipment. Longitudinal wind should typically be applied to structural framing. Therefore. platforms. For calculation of foundation soil bearing pressures or pile loads. When anchor loads have large magnitude and are applied to the top flange of the beam. and the piperack structure should be considered and should be based on their operating weights. a resultant longitudinal friction force equal to 7.5% of the total pipe weight or 30% of any one or more lines known to act simultaneously in the same direction. friction loads are not combined with wind or seismic loads. The effects of longitudinal wind on piping and trays running parallel to the wind direction should be neglected. D D + L + SL + Tf + Ta D + Tf + Ta D + 1. 7.2Ta 0.7S + 1. 5.6W + 1. 2.8W + 1.4Ta) + 1.4Tf + 1.5L + 0.7L +1.PIPE RACK DESIGN GUIDELINES http://www.3W + Ta D + L + 0. 3.2D + 1.cover plating.6W + 1.6W 1. 4.2D + 1. FINAL ANCHOR AND GUIDE LOAD CHECK: Where the design of transverse beams has been based on anchor loads as explained in step-2. ALLOWABLE HORIZONTAL AND VERTICAL DEFLECTION: Allowable deflections of piperack structures shall be as per project design criteria. 1. 8.5S + 1. 7. 6.2Ta De is the minimum dead load on the structure. 3.75 (1.4D + 1.2D + 1.4Tf +1.75 (1.6L + 0.2Ta 1.php?t=8219 1.9De + 1.2Ta 1. 8.a final check of beams (and other affected members) should be made when final definition of these loads is available from the Pipe Stress Engineer.2Ta Steel Design load combinations: (AISC .4 + Ta D + 0.65W + Ta 0.4 + Ta Load Combinations for design of foundations (ACI 318): 1. 6.5S + 1. 5.2D + 1.4D + 1.2Ta 1.2D + 1. 6.5L + 0. 2.4Ta 0.org/forum/viewtopic. unless a more stringent requirement is given by the manufacturer of the equipment.. 2.LRFD) 1. strengthening members (i. 4.3W +Ta D + L + S +0.4D + 1. an overstress in any element (of up to 10%) can be considered. 1.9De + E/1.9De + 1.sefindia.4D + 1.7L + 1.7L + 1.Based on the Engineer's experience and judgement.4D 1.3W + Ta D + E/1.sefindia.2S + 1.2Tf + 1.4D 1.org :: View topic .2Ta 1. etc.).9De + 1.4Ta) 0.6S + 0.0E + 0.0E + 1. and/or relocating the anchor and guide load(s).0E + 1.2Tf + 1. 5.Lateral deflection produced by sustained static forces such as pipe and anchor loads: h/200 or as per project design criteriaVertical deflection of beams due to gravity pipe loads:as per project design criteria h is the total height of the pipe rack structure.www. Modifications could entail the addition of horizontal bracing to the transverse beams to resist significant loads from the anchor(s).9De + 1. replacing and/or adding members. However. provided proper justification is given. 3. Where such overstress cannot be properly justified.7S 1.e. 4 of 11 8/23/2011 3:05 PM .7S + 1. 8.0E + 1.2Ta 0. 4.6W + 0.2Ta 0.2S + E/1.2D + 0. 7. 0. you can consider the following as limit of deflection:Lateral deflection produced by load combinations that include wind or seismic forces:Piperacks supporting equipment: h/100. 9.Piperacks supporting piping and raceway only: h/200 or as per project design criteria.6S + 0.2S + 1.5L + 1. modifications should be made to the piperack structure in order to bring the stress levels within the normal allowables.9De + 1.4 + Ta 10.5SL + 1.2Ta 0. the beam struts should be located at a level that is usually equal to one-half tier spacing above or below the bottom tier. a center spine consisting of a system of horizontal braces and struts located at midspan of each level of piping should be considered . Transverse beams are generally a moment-resisting frame. In the longitudinal direction. Concentrated loads for large pipes may be treated as in step-2. Vertical Bracing When moment-resisting frame design is not used in the longitudinal direction. transmitted through the beam struts. the 50% loading criteria does not apply. All longitudinal beam struts.PIPE RACK DESIGN GUIDELINES http://www. Knee-bracing or K-bracing is most often used for this purpose. For piperacks with more than one tier. Do not provide beam struts if they are not needed for piping or raceway support. vertical bracing should be used to transmit the longitudinal forces from the beam struts to the foundations. and shears produced by the load combinations. In such cases.php?t=8219 Step-4: Framing of Continuous/Conventional Pipe rack: Frames Main piperacks are usually designed as moment-resisting frames in the transverse direction. the longitudinal beam struts should be designed as axially loaded members that are provided for longitudinal loads and stability.sefindia. Anchor and friction load with large magnitude (see step-2. Normally.org/forum/viewtopic.sefindia. the beam struts should be designed primarily as axially loaded members. there should be at least one continuous level of beam struts on each side. Transverse Beam Transverse beams must be capable of resisting all forces. the full length of the beam should be considered as the unbraced length for the compression flange. Conversely. or for system stability. Unless precluded by 5 of 11 8/23/2011 3:05 PM . or field modifications that could otherwise be required due to late receipt of unanticipated large pipe anchor forces. unless unusual loading is encountered. Longitudinal Beam Strut For typical continuous piperack systems. Vertical bracing in the longitudinal direction should be provided to carry the longitudinal forces. the gravity loading carried by the beam struts should not be added to the design loads for the columns or footings since pipes or raceway contributing to the load on the beam struts would be relieving an equivalent load on the transverse beams. the longitudinal beam struts that support piping or raceway should be designed for 50% of the gravity loading assumed for the transverse pipe or raceway support beams. including connections. In the design of beams. The analysis model must reflect the appropriate beam end conditions. Additionally. should be designed to resist the axial loads produced by the longitudinal forces. This concept reduces the required beam sizes and provides a mechanism for eliminating or minimizing design. This 50% gravity loading will account for the usual piping and raceway take-offs. and also serves to reduce the unbraced length of the beam compression flange in flexure and to reduce the unbraced length of the beam about the weak-axis in axial compression. consideration should be given to Large pipes that are to be hydro-tested. anchor and friction load) Central Spine: For steel piperacks with spans of more than 6 m. moments. the 3D model should be checked to verify that beam struts subjected to unusually large loads (such as at expansion loops) have been given special consideration. to the baseplate / foundation level. fabrication. This additional light horizontal framing greatly increases the capacity of the transverse pipe support beams to resist friction and anchor forces.www.org :: View topic . For any continuous piperack system where the anticipated piping and raceway take-offs are minimal or none. modeled and analyzed as part of the frame system. When designing the longitudinal beam struts for flexural loads. please read that section before. this force will be considered on anchor bay only. refer Conventional pipe rack system. and shear at points along the columns. refer Conventional pipe rack system Wind Load (W): For Wind load calculation. Friction Loading (Tf): Friction forces caused by hot lines sliding across the pipe support during startup and shutdown do not apply on individual frame. and shears produced by the load combinations.www.A moment-resisting frame analysis should normally be used to determine the axial load. Column The columns must be capable of resisting all loads. the maximum distance from the braced bay to a free bay should be limited such that the maximum total longitudinal growth or shrinkage of the unrestrained segment does not exceed 40 mm.PIPE RACK DESIGN GUIDELINES http://www.php?t=8219 equipment arrangement or interferences. In this page I will talk about the Non-continuous piperack system.Continuous Pipe rack: This is a system comprised of independent cantilevered. Design calculations and drawings must reflect a break in the beam strut continuity between adjacent braced sections through the use of slotted connections or by eliminating the beam struts in the bays designated as free bays. refer Conventional pipe rack system. Therefore. Anchor and Guide Loads (Ta): For Anchor and Guide load calculation. I hope you have read the Conventional pipe rack system design philosophy. Earthquake Loads (E): For Earth quake load calculation. Step . moment. If the braced bay is not located equidistant from the free bays. where feasible. If not. moments. Step-1: Data collection for pipe rack design: Method of Data collections is same as continuous pipe rack.org :: View topic .sefindia. should result in lower total installed cost (TIC). bracing should be placed equidistant between two expansion joints. This system. Step-2: Design loads consideration: Following loads are to be considered for the non-conventional pipe rack design: Gravity load (D): For Gravity load calculation. freestanding 2D frames not dependent on longitudinal beam struts for system stability. Please look into 3D model and collect all the data as required. refer Conventional pipe rack system.3: Load Combinations and allowable deflection of pipe rack: 6 of 11 8/23/2011 3:05 PM . Longitudinal seismic will be applied on anchor bay only.The frame analysis model should be based on the following: Consider column base as hinge.sefindia. Use 4 bolt connections for safety purpose For design of steel columns subjected to flexural loads. the distance between the base and the first transverse beam or the knee brace intersection should be considered as the compression flange unbraced length.org/forum/viewtopic. Non. The maximum length of a braced section should be limited to 48m to 50m. as frame will deflect along the pipe direction. Transportation time needs to be considered in total project schedule. at shop.PIPE RACK DESIGN GUIDELINES http://www. 6 and 10 point lifting are difficult and should be avoided. Step . why do we go for modular structure sometimes? Here are some reasons: If the project site is at remote location. Pipe-rack Module Transportation: Module can be transported by roadways and waterways. Cable trays and miscellaneous equipment. refer Conventional pipe rack system. then you can save the project cost. Modular Pipe rack Sometimes clients look for modular pieprack / modular structure for their plants. the force distribution throughout the module is similar to the in-situ design. 4 point lifts result higher crane capacity and safer lifts due to shorter boom requirements. I hope you have read the Conventional pipe rack system design philosophy. if you fabricate and fit all the pipes . Examples are: Building modules: Structural Frames completely fitted with Miscllaneous equipment and architectural finishes. except that the module columns are in compression in-stu and reversed to tension during a lift. Pipe-rack Module Lifting: 4 point lifts are preferred and 8 point lifts are second preference. there are some disadvantages also and these are: Late changes in design has huge effect on structure and module assembly. But do you know what is a module? Module is a series of standard units that function together.org/forum/viewtopic. cable trays etc. Please click here for different module shipping envelope. Please click here for 4-point module lifting. Now the question is . then it will be very difficult to get good local contractor.sefindia. typical self supporting bridge truss style pipe rack modules use 4 lift points located at the top of the modules columns in the webs. Piperack Module: Structural Frames completely fitted with pipes.org :: View topic . Regardless of the length. In Alberta province (Canada) 100 ft (long) x 24 ft (wide) x 29ft-6 in (high from road surface) PRM can be transported by truck from module yard to site.4: Frames of non-conventional pipe rack: In this page I will talk about the Modular piperack system.www. So. labour cost at site is more than labour cost at fabrication / module assembly shop.sefindia. 4 point lifts reduce rigging cost and associated man-power during setting. please read that section before. If not. Parallel construction activities are possible (foundation and module fabrication) and gain in time schedule Controlled construction environment is possible Controlled quality controlled In some countries. By lifting at the same location that the module is supported in-situ.php?t=8219 For Load combinations and allowable deflection of non-conventional pipe rack. Following are some steps to design the Modular pipe rack: Step-1: Data collection for pipe rack design: Method of Data collections is same as Conventional pipe rack system. Please look into 3D model and collect all the data as required. I have some experiences in roadways piperack module transportation. However. Transportation cost from module shop to site may be very high. Step-2: Design loads consideration: Following loads are to be considered for the non-conventional pipe rack design: 7 of 11 8/23/2011 3:05 PM . Friction Loading (Tf): For Friction load calculation.sefindia. Lifting load combinations: LC1 = 2. refer Conventional pipe rack system.05 x Wind LC5: 1.25 x Dead load + 1. During up-hill or down-hill movement of the truck .0 x Total dead load (ultimate load combinations for member design per Canadian steel code CISC / NBC -95) Transportation load combinations (ultimate load combinations per CISC-Canadian steel code / NBC -95 for member design)): LC1: 1.05 x IL + 1.PIPE RACK DESIGN GUIDELINES http://www.30 x dead weight) acts towards the longitudinal direction of the module. You need to check the Factor of safety againgst overturning during transportation and value should be more than 1. refer Conventional pipe rack system Wind Load (W): For Wind load calculation. You need to follow your project design criteria for the pipe-rack analysis and design. we also consider wind load and vertical impact load.05 x IV + 1.5 x IV + 1.30 x weight of module (30% of total dead load) acting transverse direction of modules.5) on module.5 x IT LC3: 1.05 x IV + 1. Earthquake Loads (E): For Earth quake load calculation. Step . Other than these horizontal loads. Anchor and Guide Loads (Ta): For Anchor and Guide load calculation.25 x Dead load + 1.5 x IV + 1.5 x IV + 1.sefindia. refer Conventional pipe rack system.5 x Wind LC4: 1.25 x Dead load + 1. During a truck turn or due to superelevation of the road.05 x Wind Above load combinations are for reference only. refer Conventional pipe rack system.www.org :: View topic . refer Conventional pipe rack system.5. Step . a horizontal load is also generated (centrfugal force) and value of that load is also 0.3: Load Combinations and allowable deflection of pipe rack: For Load combinations and allowable deflection of Modular pipe rack for in-situ analysis and design. pipe and cable tray. Modular pipe rack to be analysed for transportation and for lifting also. different types of horizontal loads are generated. Erection loads and lifting points: In this case we generally consider a vertical impact load (load factor = 1. Summary of transportation load: Vertical Impact Load (IV) – 50% of (self weight of structure + Empty weight of pipe + Cable tray) Horizontal Impact in Longitudinal direction (IL) – 30% of (self weight of structure + Empty weight of pipe + Cable tray) Horizontal Impact in Transverse direction (IT) – 30% of (self weight of structure + Empty weight of pipe + Cable tray) Wind load (WLT) – Wind load is applied on pipe rack module structure.4: Frames of Modularl pipe rack: Back to top 8 of 11 8/23/2011 3:05 PM . refer Conventional pipe rack system. Transportation loads: When pipe-rack modules are transported on the road.05 x IT + 1. we generally considered a horizontal load of value 30% of total load (o.5 x IL LC2: 1.25 x Dead load + 1.org/forum/viewtopic.php?t=8219 Gravity load (D): For Gravity load calculation. But both the horizontal loads (longitudinal and transverse direction) do not act together.25 x Dead load + 1. in Transverse direction. 2011 1:44 pm Post subject: The Temperature effect is depends on the location also.PARTHASARATHY CHENNAI GPSARATHYY@GMAIL. 2010 9:23 pm Post subject: PIPE LINE RACK DESIGN Dear friend. _________________ G. Joined: 28 Jun 2010 Posts: 230 Location: chennai For piperack. What will be the difference in Temperature? Temperature difference between the fabrication/casting and the Max or Minimum ambient temperature? Temperature difference between the fabrication/casting and the Max or Minimum ambient temperature? + 20 degrees Temperature difference between the fabrication/casting and (Maximum Ambient Temperature + Minimum Ambient temperature)/2 Some may argue we are already providing the expansion joing between the structure and why we need to consider the thermal stresses in structure? . Seniors and experts are requested to throw some light on the above topic.www. These stresses are secondary stresses which will add forces to the longitudinal bracings and the longitudinal members. Back to top gpsarathyy SEFI Stars Posted: Tue Jul 19. _________________ G.php?t=8219 badamsundararao SEFI Stars Posted: Tue Aug 31.org :: View topic . In STAAD we have to apply only the delta T (difference in Temperature).org/forum/viewtopic.which is not correct.PIPE RACK DESIGN GUIDELINES http://www.COM Back to top gpsarathyy SEFI Stars Posted: Tue Jul 19.PARTHASARATHY CHENNAI GPSARATHYY@GMAIL. hence we will discuss only for India. this Joined: 28 Jun 2010 Posts: 230 Location: chennai will confine the discussion and will give more clarity on the discussion. For optimum design it is better to provide the braced bay at the center of the piperack. temperature load is also to be considered.COM Back to top gpsarathyy SEFI Stars Posted: Tue Jul 19.sefindia. there by 9 of 11 8/23/2011 3:05 PM . we have to consider the thermal stresses. Can anybody confirm on this which is more appropriate. Joined: 24 Dec 2009 Posts: 119 Location: KAKINADA ANDHRA PRADESH Thank you for the information. considering the thermal expansion or Joined: 28 Jun 2010 Posts: 230 Location: chennai thermal stresses that will develop in the piperack members.sefindia. For this loads each company is following different way. 2011 6:24 pm Post subject: In General the piperack length is restricted to 50m as max. 2011 1:41 pm Post subject: Dear Sefians. badam sundara rao. This is very useful data for design engineers. PIPE RACK DESIGN GUIDELINES http://www.PARTHASARATHY CHENNAI GPSARATHYY@GMAIL. _________________ G. 2008 SEFINDIA.COM Back to top gpsarathyy SEFI Stars Posted: Sat Jul 23. Joined: 28 Jun 2010 Posts: 230 Location: chennai Please give your opinion on what temperature loads to be considered in the piperack design. _________________ G.Strong earthquake hits near Japan's eastern coast. 2011 1:22 pm Post subject: Senior Sefi Persons are requested to share their knowledge on Temperature loads over piperack. To get the unique solution and concept your views are essential.sefindia. no danger of tsunami powered by powered by 10 of 11 8/23/2011 3:05 PM . 2011 9:55 pm Post subject: Dear Sefians.PARTHASARATHY CHENNAI [email protected]. 2011 7:46 pm Post subject: Senior Sefians are requested to share the knowledge on the temperature loads on piperack.org Forum Index -> SEFI General Discussion Page 1 of 1 Jump to: SEFI General Discussion Translation: Translate topic Go in in in in in in in this this this this this this this forum forum forum forum forum forum forum Go You cannot post new topics You cannot reply to topics You cannot edit your posts You cannot delete your posts You cannot vote in polls You cannot attach files You can download files © 2003.5 Hours www. _________________ G.php?t=8219 reducing the thermal expansion of the piperack at the ends. Indian Domain Registration tsunami earthquake Washington Post .org/forum/viewtopic.PARTHASARATHY CHENNAI [email protected] CHENNAI GPSARATHYY@GMAIL. Joined: 28 Jun 2010 Posts: 230 Location: chennai Now the different company they are following different standards of temperature loads.COM Back to top gpsarathyy SEFI Stars Posted: Tue Aug 23.www.COM Back to top gpsarathyy SEFI Stars Posted: Sun Aug 07. Waiting for your postings.sefindia. Joined: 28 Jun 2010 Posts: 230 Location: chennai Please give your opinion.org :: View topic .COM Back to top Display posts from previous: All Posts Oldest First Go All times are GMT + 5. _________________ G. org :: View topic .sefindia.org/forum/viewtopic.or an earthquake 11 of 11 8/23/2011 3:05 PM .PIPE RACK DESIGN GUIDELINES http://www.sefindia.How to prepare for Hurricane Irene -.www.php?t=8219 Los Angeles Times .