µ kg/l 1.00 h m 12.80 Course Course Product Minimum Allowable Joint calc. Installed measured Minimal Integrity No. height height Yield Stress Efficiency t thickness thickness thickness check Y factor Factor incl. CA per DEP Tank diameter D m 24.40 [m] [m] [ N/mm2] k [mm] [mm] [mm] [mm] Tank height H m 13.20 Design pressure P d mbar 20.00 No. shell courses 7 top 7 1.89 1.49 210 0.667 1.00 1.19 6.00 6.00 3.00 OK 6 1.89 3.37 210 0.667 1.00 2.80 6.00 6.00 3.00 OK 5 1.89 5.26 210 0.667 1.00 4.41 6.00 6.00 4.41 OK 4 1.89 7.14 210 0.667 1.00 6.02 7.00 7.00 6.02 OK 3 1.89 9.03 210 0.667 1.00 7.62 8.00 8.00 7.62 OK 2 1.89 10.91 210 0.667 1.00 9.23 10.00 10.00 9.23 OK bottom 1 1.89 12.80 210 0.667 1.00 10.84 11.00 11.00 10.84 OK 13.20 µ kg/l 0.75 h m 12.80 Course Course Product Minimum Allowable Joint calc. Installed measured Minimal Integrity No. height height Yield Stress Efficiency t thickness thickness thickness check Y factor Factor incl. CA per DEP [m] [m] [ N/mm2] k [mm] [mm] [mm] [mm] top 7 1.89 1.49 210 0.67 1.00 0.93 6.0 6.0 3.00 OK 6 1.89 3.37 210 0.67 1.00 2.14 6.0 6.0 3.00 OK 5 1.89 5.26 210 0.67 1.00 3.35 6.0 6.0 3.35 OK k=0.67 (new) or 0.8(fit for purpose) 4 1.89 7.14 210 0.67 1.00 4.55 7.0 7.0 4.55 OK 3 1.89 9.03 210 0.67 1.00 5.76 8.0 8.0 5.76 OK 2 1.89 10.91 210 0.67 1.00 6.97 10.0 10.0 6.97 OK bottom 1 1.89 12.80 210 0.67 1.00 8.18 11.0 11.0 8.18 OK Product density Max fill height Company Tank Id Design code Product conditions: S = maximum allowable stress in N/mm2 (see 5.7) E = joint efficiency factor H = height from the lower edge of the course under consideration to the top of the shell in metres D = nominal diameter of tank in metres p = design pressure in mbar (ga) CA = corrosion allowance in mm (for special cases only, to be specified in requisition; normally zero) w = maximum density of product to be stored in g/ml (a value of 1.00 shall be used even where the product to be stored is lighter) Tank shell fit for purpose calculations The following formula is used in calculating the required minimal thickness of shell courses: Shell Material Hydrotestic test conditions: Water density Filling height ( ) CA p h E S D t D + + ÷ = ) 3 . 0 .( . 98 . . 20 min µ T52 Calculation for compression area as required (BS2654, section 8.5.2) : D m 24.40 R m 12.20 H m 13.20 p mbar 20.00 Vw m/s 45.00 S c N/mm 2 120.00 unless other wise specified t r mm 5.00 µ kg/m3 7850.00 L mbar 3.93 kg/m2 39.25 slope degr 11.30 slope 1:5 A r mm 2 4989 , with p less roof weight Calculation for section area as avaialble : WT Roofplates t r mm 5.00 Wh = 335 mm WT Top Course t s mm 6.00 Wc = 162 mm Radius of roof curvature R 2 m 62.27 Area D (Roof Wh) A D mm 2 1674 b h WT 150 150 10 A T1 mm 2 2900 approx. A T1 mm 2 0 A C mm 2 974 A a mm 2 5548 Conclusion : Maximum internal pressure Pd mbar 24.5 See API650, section F.4.1. Maximum design pressure Allowable compressive stress Roofplate thickness (annular) SG(density) of steel deadload roof plates Required compression area Available compression area (A ac =A D +A n +A C ) Aa>Ar, L-Profile is OK! Area of angle 2 Area C (shell Wc) Tank height Design windspeed Area of angle 1 Design pressure TopCurb Angle Roof slope Compression Ring calculations Tank radius Tank diameter ) ( . . . 50 2 u TAN S R p A C = Roofslope 1:5 W c Top Curb 1 Top Curb 2 Radius WTshell see BS2654, section 7.3.2.7 Tank diameter D m 24.40 Tank height H m 13.20 design wind speed V w m/s 45.00 design vacuum V a mbar 6.00 Calc. Factor K - 8.883 Top course thickness-CA t min m 6.00 Course Course Course H e Cummel. No. height thickness Transposed h c [m] t [mm] [m] width [m] top 7 1.89 6.00 1.89 8.80 6 1.89 6.00 1.89 6.91 5 1.89 6.00 1.89 5.03 4 1.89 7.00 1.28 3.14 3 1.89 8.00 0.92 1.86 2 1.89 10.00 0.53 0.94 bottom 1 1.89 11.00 0.41 0.41 sum(transposed) 8.80 HE Max permitted spacing (unstiffed) 6.499 Hp (H1) Min. No. of secondary wind girders required 1.00 No. of windgirders installed 2 OK! Tank diameter (m) MIN Stiffener (mm) Wind Load Condition Design vacuum DEP 70.51.10.11-Gen.Use for Va: 2.5 mbar (ga) for non-pressure fixed roof tanks; 5.0 mbar (ga) for open top floating roof tanks; 6.0 mbar (ga) for low and high pressure fixed roof tanks / BS2654, section 7.3.2.6 Use for Va: 5 mbar (ga) for non-pressure; 8.5 mbar for other Other shapes with equivalent section modulus may be used. The section modulus may include a portion of the shell for a distance of 16 times shell plate thickness above and below the stiffener. 48 > D 200 x 100 x 12 125 x 75 x 8 D s 20 100 x 65 x 8 20 < D s 36 36 < D s 48 150 x 90 x 10 5 min | . | \ | = t t h H course e ¿ = e E H H a w v V K 580 563 . 3 95000 2 + = | | . | \ | = 3 5 min D t K H p Data Given : 7.6 m 25 ft 7.6 m 25.0 ft 347 m 3 2185 barrels Low Pressure Low Pressure 20 mbar 8.03 inch w.c. 6 mbar 2.41 inch w.c. 176 o C 349 o F 80 m 3 /hour 503 barrels/h 20 m 3 /hour 126 barrels/h N N no no 0 mm 0 inch 1 182 m 2 1964 ft SCFH = Standard Cubic Feet of air per Hour (1) Normal outbreathing (Pressure relief) requirements: Required venting capacity for normal pressure relief due to pumping-in Required capacity= (6xSCFH )x(Max pump-in rate) Required capacity= 3018 SCFH Required venting capacity for normal pressure relief due to thermal outbreathing see table II-collumn 3 of API2000, 2.4.2 for product with flash point >100 o F (INTERMEZZO-I) Required capacity= 1312 SCFH air Total required normal pressure relief capacity = 3018 + 1312 = 4330 SCFH air 123 m 3 /hour (2) Normal inbreathing (Vacuum relief) requirements: Required venting capacity for normal vacuum relief due to pumping-out Required capacity= (5.6 SCFH)x(Max pump-out rate) Required capacity= 704 SCFH Required venting capacity for normal vacuum relief due to thermal inbreathing see table II-collumn 2 of API2000, 2.4.2 Required capacity= 2185 SCFH air Correction for climate 2185 if applicable Total required normal vacuum relief capacity = 704 + 2185 = 2890 SCFH air 82 m 3 /hour (3) Emergency venting Emergency venting required in accordance with API 2000, section 4.3.3.2, Table 3 Required capacity Q= -3809 m 3 /hour (incl. the environmental factor) -134194 SCFH air Wetted area Insulation thicknes Environmental factor metric U.S. Diameter Max pump-out rate Height Max pump-in rate Code Design pressure Tank insulated ? Hot Climate Tank capacity Design vacuum Flash point product Tank Venting Calculations API2000 Data Given : 24.0 m 79 ft 14.5 m 47.4 ft 6537 m 3 41111 barrels Low Pressure Low Pressure 20 mbar 8.03 inch w.c. 6 mbar 2.41 inch w.c. -40 o C -40 o F 900 m 3 /hour 5659 barrels/h 900 m 3 /hour 5659 barrels/h N N no no 0 mm 0 inch 1 689 m 2 7419 ft SCFH = Standard Cubic Feet of air per Hour (1) Normal outbreathing (Pressure relief) requirements: Required venting capacity for normal pressure relief due to pumping-in Required capacity= (12xSCFH )x(Max pump-in rate) Required capacity= 67914 SCFH Required venting capacity for normal pressure relief due to thermal outbreathing see table II-collumn 3 of API2000, 2.4.2 for product with flash point >100 o F (INTERMEZZO-I) Required capacity= 34926 SCFH air Total required normal pressure relief capacity = 67914 + 34926 = 102840 SCFH air 2919 m 3 /hour (2) Normal inbreathing (Vacuum relief) requirements: Required venting capacity for normal vacuum relief due to pumping-out Required capacity= (5.6 SCFH)x(Max pump-out rate) Required capacity= 31693 SCFH Required venting capacity for normal vacuum relief due to thermal inbreathing see table II-collumn 2 of API2000, 2.4.2 Required capacity= 34926 SCFH air Correction for climate 34926 if applicable Total required normal vacuum relief capacity = 31693 + 34926 = 66619 SCFH air 1891 m 3 /hour (3) Emergency venting Emergency venting required in accordance with API 2000, section 4.3.3.2, Table 3 Required capacity Q= 19910 m 3 /hour (incl. the environmental factor) 701353 SCFH air Tank insulated ? Hot Climate Tank capacity Design vacuum Flash point product Tank Venting Calculations API2000 U.S. Diameter Max pump-out rate Height Max pump-in rate Code Design pressure Wetted area Insulation thicknes Environmental factor metric