AS4041 Straight InternalAS4041 PRESSURE PIPING - ALLOWABLE
DESIGN PRESSUREWeld Joint Factor (AS4041 Table 3.12.2 or
D12)e1.00Product of e x M not less than 0.7Class Design Factor
(AS4041 Table 3.12.3)M1.00e x M1Design Temperature, CT525Weld Joint
Strength Reduction Factor (AS4041 Table 3.12.5)W0.975Material
Design Strength, MPa (AS4041, Appendix D)f82.68Pipe Outside
Diameter from Pipe Charts, mmD273.2Nominal Wall Thickness from Pipe
Charts, mmtm12.77Manufacturing TolerancesManufacturing Tolerance (
%)12.5Aust Pipes 10%; American Pipes 12.5%Corrosion Allowance,
mmG1.6Depth of Threading, Grooving or Machining, mm0.0Pressure
Design Wall Thickness, mmtf9.57Maximum Allowable Design Pressure,
MPaMADP5.86AS4041 PRESSURE PIPING - REQUIRED PRESSURE DESIGN WALL
THICKNESSWeld Joint Factor (AS4041 Table 3.12.2 or D12)e1.00Product
of e x M not less than 0.7Class Design Factor (AS4041 Table
3.12.3)M1.00e x M1.0Design Temperature, CT525.00Weld Joint Strength
Reduction Factor (AS4041 Table 3.12.5)W0.975Material Design
Strength, MPa (AS4041, Appendix D)f82.68Pipe Outside Diameter from
Pipe Charts, mmD273.2Manufacturing Tolerance ( %)12.5Manufacturing
TolerancesCorrosion Allowance, mmG1.6Aust Pipes 10%; American Pipes
12.5%Depth of Threading, Grooving or Machining, mm0.0Design
Pressure, MPap5.82Pressure Design Wall Thickness, mmtf9.51Required
Wall Thickness (including allowances), mmtm12.70Therefore Choose
DN250 S/S pipe will a nominal thickness > 12.7 mm
ASME B31.3 Straight InternalASME B31.3 PROCESS PIPING -
ALLOWABLE DESIGN PRESSUREWeld Joint Quality Factor (ASME B31.3
Table 302.3.4)Ej1.00Seamless ASTM A312 TP316Coefficient Y (ASME
B31.3 Table 304.1.1)Y0.40Design Temperature, CT-29-84.20FWeld Joint
Strength Reduction Factor (ASME B31.3 Cl. 302.3.5(e))W1.000Material
Allowable Stress, MPa (ASME B31.3 Table A-1M)S137.820 ksiPipe
Outside Diameter from Pipe Charts, mmD273.210.75"Nominal Wall
Thickness from Pipe Charts, mmtm12.77Manufacturing
TolerancesManufacturing Tolerance ( %)12.5Aust Pipes 10%; American
Pipes 12.5%Corrosion Allowance, mmc0.0Depth of Threading, Grooving
or Machining, mm0.0Pressure Design Thickness, mmt11.17Maximum
Allowable Internal Design Gauge Pressure, MPaMADP11.66ASME B31.3
PROCESS PIPING - REQUIRED PRESSURE DESIGN WALL THICKNESSWeld Joint
Quality Factor (ASME B31.3 Table 302.3.4)Ej1.00Seamless ASTM A312
TP316Coefficient Y (ASME B31.3 Table 304.1.1)Y0.40Design
Temperature, CT-2984.20FWeld Joint Strength Reduction Factor (ASME
B31.3 Cl. 302.3.5(e))W1.000Material Allowable Stress, MPa (ASME
B31.3 Table A-1M)S137.820 ksiPipe Outside Diameter from Pipe
Charts, mmD273.210.75"Manufacturing Tolerance ( %)12.5Manufacturing
TolerancesCorrosion Allowance, mmG0.0Aust Pipes 10%; American Pipes
12.5%Depth of Threading, Grooving or Machining, mm0.0Design
Pressure, MPaP1.90845 psiPressure Design Thickness,
mmt1.8730.074inchesMinimum Required Thickness (including
allowances), mmtm2.1400.0842337512inchesTherefore Choose DN250 S/S
pipe will a nominal thickness > 12.77 mmWhen the variation last
no more than 10 hours at any one time and not more than 100 hours
per year, it permissible to exceed the pressure rating or the
allowable stress design at the temperature of the increas rating or
the allowable stress for pressure.(P x D)/(2 x ((S x Ej x W) + (P x
Y)
ika.marcelina:(P x D)/(2 x ((S x Ej x W) + (P x Y)
calculationNPSPipe ODttmtaSchThk of SchRatioValidationD/61
ksi=0.145Mpa-23 to 37.893.3204.44260CS A106 150#inmmmmmmmmmmta >
tmD/t > 60.145Deg Fto
1002004005000.50.8421.3360.1593.3594.1831604.780.140137.89519.994775MpaPSIG2852602001700.751.0526.670.1993.3994.8651605.560.175177.19525.693275MPaX65CA0.0625in1.587mm11.31533.4010.2493.4493.981XS4.550.2191.51.948.260.3603.5604.445XS5.080.317NPSPipe
ODttmtaSchThk of
SchRatioValidation22.37560.3250.4503.6504.848XS5.540.396inmmmmmmmmmmta
> tmD/t >
633.588.90.6633.8634.804STD5.490.5830.50.8421.3360.1603.3600.00044.5114.30.8534.0535.268STD6.020.7500.751.0526.670.5163.7160.00066.625168.2751.2554.4556.221STD7.111.10411.31533.4010.6463.8460.00088.625219.0751.6344.8347.158STD8.181.4381.51.948.260.9344.1340.0001010.75273.052.0375.2378.111STD9.271.79222.37560.3251.1674.3670.0001212.75323.852.4155.6158.339409.532.12533.588.91.7204.9200.0001414355.62.6525.8529.7394011.132.33344.5114.32.2125.4120.0001616406.43.0316.2318.339STD9.532.66766.625168.2753.2576.4570.0001818457.23.4106.6108.339STD9.533.00088.625219.0754.2407.4400.00020205083.7896.9898.339STD9.533.3331010.75273.055.2848.4840.0002424609.64.5477.7478.339STD9.534.0001212.75323.856.2679.4670.0001414355.66.88210.0820.000CS
ASTM A106 Gr. B or API 5L Gr. B
150#1616406.47.86511.0650.000TempPS1818457.28.84812.0480.000Cbar(g)(Mpa)20205089.83113.0310.000Equation
for t (pressure design thickness as per ASME B31.3)Corrosion
Allowance-2919.6137.8952424609.611.79714.9970.0003819.2137.89510017.7137.895P19.65bar1.965Mpa15015.8137.895S137.9E1P5.1146.645.161.96MpaWS137.895Stress
value for material table A-1 ASME B31.3 page
151137.895MpaY0.4E0.950.95CA1.587mmWWeld joint strength reduction
ASME B31.3 para. 302.3.5 page 19Y0.4ASME B31.3 table 304.1.1 page
200.4CA3.2mm3.2mmCS ASTM A106 Gr. B 300#NPSPipe ODttmtaSchThk of
SchRatioValidationTempPSinmmmmmmmmmmta > tmD/t >
6Cbar(g)(Mpa)0.50.8421.3360.4133.6134.1831604.78OK51.672Valid-2951.1137.90.751.0526.6700.5163.7164.8651605.56OK51.672Valid3851.1137.911.31533.4010.6463.8463.981XS4.55OK51.672Valid10046.6137.91.51.948.2600.9344.1344.244XS4.85OK51.672Valid15045.1137.922.37560.3251.1674.3674.848XS5.54OK51.672Valid33.588.9001.7204.9206.668XS7.62OK51.672Valid44.5114.3002.2125.4127.490XS8.56OK51.672Valid66.625168.2753.2576.4579.599XS10.97OK51.672Valid88.625219.0754.2407.4409.0216010.31OK51.672Valid1010.75273.0505.2848.48411.1136012.7OK51.672Valid1212.75323.8506.2679.46712.8636014.7OK51.672Valid1414355.6006.88210.08213.2046015.09OK51.672Valid1616406.4007.86511.06511.1134012.7OK51.672Valid1818457.2008.84812.04812.4864014.27OK51.672Valid2020508.0009.83113.03113.2044015.09OK51.672Valid2424609.60011.79714.99715.2954017.48OK51.672Validfor
6" & below SS A312 TP316 150#SS A312 TP 316 300#NPSPipe
ODttmtaSchThk of SchRatioValidationfor 8" & above A358 Gr. 316
Class 1inmmmmmmmmmmta > tmD/t >
6TempPSTempPS0.50.8421.3360.1470.1473.4213.91OK145.558ValidCbar(g)(Mpa)Cbar(g)(Mpa)0.751.0526.670.1830.1833.981XS4.55OK145.558Valid-2919.0137.9-2949.6137.911.31533.4010.2290.2294.445XS5.08OK145.558Valid3819.0137.93849.6137.91.51.948.260.3320.3324.848XS5.54OK145.558Valid10016.2137.910042.2137.922.37560.3250.4140.4144.804STD5.49OK145.558Valid15014.8137.915038.5137.933.588.90.6110.6115.268STD6.02OK145.558Valid44.5114.30.7850.7856.221STD7.11OK145.558Valid66.625168.2751.1561.1567.158STD8.18OK145.558Valid88.625219.0751.5051.5058.111STD9.27OK145.558Valid1010.75273.051.8761.8760.000OK145.558Valid1212.75323.852.2252.2250.000OK145.558Valid1414355.62.4432.4430.000OK145.558Valid1616406.42.7922.7920.000OK145.558Valid1818457.23.1413.1410.000OK145.558Valid20205083.4903.4900.000OK145.558Valid2424609.64.1884.1880.000OK145.558ValidP1.94.96S137.9MpaE1WY0.4CA0PHE
WMONPSPipe ODttmtaSchThk of SchRatioValidationTTempPSinmmmmmmmmta
> tmD/t >
6tmmmD/6Cpsi(g)(Mpa)0.50.8421.3360.1514.7334.1831604.784.183.56-2919.6137.90.751.0526.670.1894.7764.8651605.564.874.453819.0137.911.31533.4010.2374.8315.5561606.355.565.5710016.2137.91.51.948.260.3424.9514.445805.084.458.0415014.8137.922.37560.3250.4275.0493.421STD3.913.4210.0533.588.90.6305.2804.183STD4.784.1814.8244.5114.30.8105.4865.268STD6.025.2719.0566.625168.2751.1925.9236.221STD7.116.2228.0588.625219.0751.5526.3347.158STD8.187.1636.511010.75273.051.9356.7718.111STD9.278.1145.511212.75323.852.2957.1838.339STD9.538.3453.981414355.62.5207.4408.339STD9.538.3459.271616406.42.8807.8518.339STD9.538.3467.731818457.23.2408.2638.339STD9.538.3476.2020205083.6008.6748.339STD9.538.3484.672424609.64.3209.4978.339309.538.34101.60P19.6bar285psi1965kPa1.96MpaS20ksi137.9MpaE1WY0.4CA2.54mmMech.
Allw1.45mm0.3mmPipe Tolerance0.125CNG Lombok 9 barg CLASS AS 150#
SS A312 TP 316NPSPipe ODttmtaSchThk of
SchRatioValidationP1.9Mpainmmmmmmmmmmta > tmD/t >
6S20ksi0.50.8421.3360.1470.1473.26480S3.73OK145.558ValidE10.751.0526.670.1830.1833.42180S3.91OK145.558ValidW11.31533.4010.2290.2293.98180S4.55OK145.558ValidY0.41.51.948.260.3320.3324.44580S5.08OK145.558ValidCA0mm22.37560.3250.4140.4143.42140S3.91OK145.558ValidMech.
Allw1.45mm33.588.90.6110.6114.80440S5.49OK145.558ValidPipe
Tolerance0.12544.5114.30.7850.7855.26840S6.02OK145.558Valid66.625168.2751.1561.1566.22140S7.11OK145.558ValidTempPS88.625219.0751.5051.5057.15840S8.18OK145.558ValidCbar(g)(Mpa)1010.75273.051.8761.8768.11140S9.27OK145.558Valid-2919.0137.91212.75323.852.2252.2258.33940S9.53OK145.558Valid3819.0137.91414355.62.4432.4434.18310S4.78OK145.558Valid10016.2137.91616406.42.7922.7924.18310S4.78OK145.558Valid15014.8137.91818457.23.1413.1414.18310S4.78OK145.558Valid20205083.4903.4904.18310S4.78OK145.558Valid2424609.64.1884.1884.18310S4.78OK145.558ValidJETTY
SENOROCS 150#NPSPipe ODttmtaSchThk of
SchRatioValidationTempPSinmmmmmmmmmmta > tmD/t >
6Fpsig(Mpa)0.50.8421.3360.1473.1474.1831604.78-20285.0137.90.751.0526.670.1833.1834.8651605.56100285.0137.911.31533.4010.2293.2295.5561606.35200260.0137.91.51.948.260.3323.3326.2481607.14300230.0137.922.37560.3250.4143.4144.848805.5433.588.90.6113.6116.668807.62P1.9Mpa44.5114.30.7853.7855.268406.02S20ksi137.9Mpa66.625168.2751.1564.1566.221407.11E188.625219.0751.5054.5055.556206.35W1010.75273.051.8764.8765.556206.35Y0.41212.75323.852.2255.2255.556206.35CA3mm1414355.62.4435.4436.930207.92Mech.
Allw-mm1616406.42.7925.7926.930207.92Pipe
Tolerance0.1251818457.23.1416.1416.930207.9220205083.4906.4908.339209.532424609.64.1887.1888.339209.53
ika.marcelina:from table A-1 ASME B31.3 then convert to
MPaika.marcelina:Table 2.1.1 ASME B16.5 group material
1.1ika.marcelina:Table 2.2.2 ASME B16.5 group material
2.2ika.marcelina:from table A-1 ASME B31.3 then convert to
MPaika.marcelina:ASME table A-1 for temp to 100C page 200 of
400ika.marcelina:Table 2.2.2 ASME B16.5 group material
2.2ika.marcelina:from table A-1 ASME B31.3 then convert to
MPaika.marcelina:19.6
barika.marcelina:17.9ika.marcelina:13.8ika.marcelina:11.7ika.marcelina:Table
2.2.2 ASME B16.5 group material 2.2ika.marcelina:from table A-1
ASME B31.3 then convert to MPaika.marcelina:internal design
pressure (bar)ika.marcelina:quality factor as per table 302.3.4 of
ASME B31.3 page 16ika.marcelina:coefficientika.marcelina:actual
pipe thickness with negative mill toleranceika.marcelina:pipe size
1/2" ~ 1.1/2" mechanical allowance 1.45 mmika.marcelina:pipe size
2" & above mechanical allowance 0.3 mmika.marcelina:Table 2.1.1
ASME B16.5 group material 1.1ika.marcelina:from table A-1 ASME
B31.3 then convert to MPaika.marcelina:Table 2.2.2 ASME B16.5 group
material 2.2ika.marcelina:from table A-1 ASME B31.3 then convert to
MPaika.marcelina:based on table A-1 B31.3 page
170ika.marcelina:stated in PMS that min. schedule for 1.1/2" &
below should be 80Sika.marcelina:Table F2-1.1 ASME B16.5 group
material 1.1 page 118ika.marcelina:from table A-1 ASME B31.3 then
convert to MPaika.marcelina:based on table A-1 B31.3 page 170
Sheet3ASME B31.3
AS4041 Bend InternalAS4041 PRESSURE PIPING - REQUIRED PRESSURE
DESIGN WALL THICKNESS FOR BENDSWeld Joint Factor (AS4041 Table
3.12.2 or D12)e1.00Product of e x M not less than 0.7Class Design
Factor (AS4041 Table 3.12.3)M1.00e x M1.0Design Temperature,
CT525.00Weld Joint Strength Reduction Factor (AS4041 Table
3.12.5)W0.975Bend Radius, measured to pipe centreline,
mmR11270Material Design Strength, MPa (AS4041, Appendix
D)f82.68Pipe Outside Diameter from Pipe Charts,
mmD273.2Manufacturing Tolerance ( %)12.5Manufacturing
TolerancesCorrosion Allowance, mmG1.6Aust Pipes 10%; American Pipes
12.5%Depth of Threading, Grooving or Machining, mm0.0Design
Pressure, MPap5.82"I" at the IntradosI1.060"I" at the
ExtradosI0.951Pressure Design Wall Thickness @ Intrados,
mmtf8.99Problem with AS4041 formula compared to ASME B31.3
formula.Pressure Design Wall Thickness @ Extrados, mmtf9.98The
intrados should get thicker and the extrados thinner.Required Wall
Thickness @ Intrados, mmtm12.10As thickness is "lost"during the
bending process, it would be normalRequired Wall Thickness @
Extrados, mmtm13.24to multiply the required wall thickness at the
extrados by a factor of1.1 to 1.125 dependent upon how "tight"the
bend radius is. The resultingvalue will give the nominal thickness
of pipe required for bending.
ASME B31.3 Bend InternalASME B31.3 PROCESS PIPING - REQUIRED
PRESSURE DESIGN WALL THICKNESS FOR BENDSWeld Joint Quality Factor
(ASME B31.3 Table 302.3.4)Ej1.00Coefficient Y (ASME B31.3 Table
304.1.1)Y0.40Design Temperature, CT525.00Weld Joint Strength
Reduction Factor (ASME B31.3 Cl. 302.3.5(e))W0.975Bend Radius,
measured to pipe centreline, mmR11270Material Allowable Stress, MPa
(ASME B31.3 Table A-1M)S82.6811.991ksiPipe Outside Diameter from
Pipe Charts, mmD273.2Manufacturing Tolerance ( %)12.5Manufacturing
TolerancesCorrosion Allowance, mmG1.6Aust Pipes 10%; American Pipes
12.5%Depth of Threading, Grooving or Machining, mm0.0Internal Gauge
Pressure, MPaP5.82"I" at the IntradosI1.060"I" at the
ExtradosI0.951Pressure Design Thickness @ Intrados,
mmt10.14Pressure Design Thickness @ Extrados, mmt9.13Required Wall
Thickness @ Intrados, mmtm13.42As thickness is "lost"during the
bending process, it would be normalRequired Wall Thickness @
Extrados, mmtm12.26to multiply the required wall thickness at the
extrados by a factor of1.1 to 1.125 dependent upon how "tight"the
bend radius is. The resultingvalue will give the nominal thickness
of pipe required for bending.