Pressure Ratings Update | Webco Industries, Inc.
Stainless Steel Tube
Pressure Ratings

Tubing with higher strengths are available in other grades

Additional grades include duplexes, nickel alloys, titanium and ferritics

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Click on any of the BLUE HEADERS below for table information

OD inchesAve. Wall inchesMin Yield Strength (PSI)Min Tensile Strength (PSI)Theoretical Burst Pressure * (PSI)Working Pressure (PSI) 25% of BurstTheoretical Yield Point ** (PSI)Collapse Pressure *** (PSI)
0.2500.02030,00075,00014,2863,5715,7144,416
0.2500.02830,00075,00021,6495,4128,6605,967
0.2500.03530,00075,00029,1677,29211,6677,224
0.2500.04930,00075,00048,35512,08919,3429,455
0.2500.06530,00075,00081,25020,31332,50011,544
0.3750.02030,00075,0008,9552,2393,5823,029
0.3750.02830,00075,00013,1663,2925,2664,145
0.3750.03530,00075,00017,2134,3036,8855,077
0.3750.04930,00075,00026,5346,63410,6146,816
0.3750.06530,00075,00039,7969,94915,9188,597
0.5000.02030,00075,0006,5221,6302,6092,304
0.5000.02830,00075,0009,4592,3653,7843,172
0.5000.03530,00075,00012,2093,0524,8843,906
0.5000.04930,00075,00018,2844,5717,3135,304
0.5000.06530,00075,00026,3516,58810,5416,786
0.5000.08330,00075,00037,2759,31914,9108,307
0.6250.02030,00075,0005,1281,2822,0511,859
0.6250.02830,00075,0007,3811,8452,9532,568
0.6250.03530,00075,0009,4592,3653,7843,172
0.6250.04930,00075,00013,9473,4875,5794,335
0.6250.06530,00075,00019,6974,9247,8795,591
0.6250.08330,00075,00027,1246,78110,8506,910
0.6250.09530,00075,00032,7598,19013,1037,734
0.6250.10930,00075,00040,17210,04316,0698,639
0.7500.02830,00075,0006,0521,5132,4212,156
0.7500.03530,00075,0007,7211,9303,0882,669
0.7500.04930,00075,00011,2732,8184,5093,664
0.7500.06530,00075,00015,7263,9316,2904,749
0.7500.08330,00075,00021,3185,3308,5275,905
0.7500.09530,00075,00025,4466,36210,1796,637
0.7500.10930,00075,00030,7337,68312,2937,453
0.7500.12030,00075,00035,2948,82414,1188,064
0.8750.02030,00075,0003,5938981,4371,340
0.8750.02830,00075,0005,1281,2822,0511,859
0.8750.03530,00075,0006,5221,6302,6092,304
0.8750.04930,00075,0009,4592,3653,7843,172
0.8750.06530,00075,00013,0873,2725,2354,126
0.8750.08330,00075,00017,5604,3907,0245,152
0.8750.09530,00075,00020,8035,2018,3215,807
0.8750.10930,00075,00024,8866,2219,9546,543
0.8750.12030,00075,00028,3467,08711,3397,100
1.0000.02830,00075,0004,4491,1121,7801,633
1.0000.03530,00075,0005,6451,4112,2582,027
1.0000.04930,00075,0008,1492,0373,2592,796
1.0000.06530,00075,00011,2072,8024,4833,647
1.0000.08330,00075,00014,9283,7325,9714,567
1.0000.09530,00075,00017,5934,3987,0375,159
1.0000.10930,00075,00020,9085,2278,3635,827
1.0000.12030,00075,00023,6845,9219,4746,336
1.0000.13430,00075,00027,4596,86510,9846,963
1.2500.03530,00075,0004,4491,1121,7801,633
1.2500.04930,00075,0006,3801,5952,5522,260
1.2500.06530,00075,0008,7052,1763,4822,958
1.2500.08330,00075,00011,4852,8714,5943,719
1.2500.09530,00075,00013,4433,3615,3774,213
1.2500.10930,00075,00015,8433,9616,3374,776
1.2500.12030,00075,00017,8224,4557,1295,207
1.2500.13430,00075,00020,4685,1178,1875,742
1.5000.03530,00075,0003,6719181,4691,367
1.5000.04930,00075,0005,2431,3112,0971,896
1.5000.06530,00075,0007,1171,7792,8472,487
1.5000.08330,00075,0009,3332,3333,7333,136
1.5000.09530,00075,00010,8782,7194,3513,559
1.5000.10930,00075,00012,7543,1885,1014,043
1.5000.12030,00075,00014,2863,5715,7144,416
1.5000.13430,00075,00016,3154,0796,5264,881
1.5000.14830,00075,00018,4394,6107,3755,336
1.7500.03530,00075,0003,1257811,2501,176
1.7500.04930,00075,0003,8649661,5461,434
1.7500.06530,00075,0006,0191,5052,4072,146
1.7500.08330,00075,0007,8601,9653,1442,711
1.7500.09530,00075,0009,1352,2843,6543,080
1.7500.10930,00075,00010,6722,6684,2693,504
1.7500.12030,00075,00011,9212,9804,7683,832
1.7500.13430,00075,00013,5633,3915,4254,242
1.7500.14830,00075,00015,2683,8176,1074,645
1.7500.16530,00075,00017,4304,3576,9725,124
2.0000.03530,00075,0002,7206801,0881,032
2.0000.04930,00075,0003,8649661,5461,434
2.0000.06530,00075,0005,2141,3032,0861,887
2.0000.08330,00075,0006,7881,6972,7152,387
2.0000.09530,00075,0007,8731,9683,1492,715
2.0000.10930,00075,0009,1752,2943,6703,092
2.0000.12030,00075,00010,2272,5574,0913,384
2.0000.13430,00075,00011,6052,9014,6423,751
2.0000.14830,00075,00013,0283,2575,2114,111
2.0000.16530,00075,00014,8203,7055,9284,542
OD inchesAve. Wall inchesWt/Ft (lbs.) 304L/316LWt/Ft (lbs.) DuplexWt/Ft (lbs.) 825Wt/Ft (lbs.) 625Wt/Ft (lbs.) TitaniumWt/Ft (lbs.) Ferritics
0.2500.0200.0500.0490.0510.0530.0280.049
0.2500.0280.0670.0660.0690.0710.0380.066
0.2500.0350.0810.0790.0830.0870.0460.079
0.2500.0490.1060.1040.1090.1130.0610.104
0.2500.0650.1300.1270.1330.1380.0740.127
0.3750.0200.0770.0750.0790.0820.0440.075
0.3750.0280.1050.1030.1080.1120.0600.103
0.3750.0350.1280.1260.1320.1370.0730.126
0.3750.0490.1720.1690.1770.1840.0980.169
0.3750.0650.2170.2130.2230.2320.1240.213
0.5000.0200.1030.1010.1060.1100.0590.101
0.5000.0280.1420.1390.1460.1520.0810.139
0.5000.0350.1750.1720.1800.1870.1000.172
0.5000.0490.2380.2330.2450.2540.1360.233
0.5000.0650.3050.2980.3130.3250.1740.298
0.5000.0830.3730.3650.3840.3980.2130.365
0.6250.0200.1300.1280.1340.1390.0740.128
0.6250.0280.1800.1760.1850.1920.1030.176
0.6250.0350.2230.2180.2290.2370.1270.218
0.6250.0490.3040.2980.3130.3250.1730.298
0.6250.0650.3920.3840.4030.4190.2240.384
0.6250.0830.4850.4750.4990.5170.2760.475
0.6250.0950.5430.5310.5580.5790.3090.531
0.6250.1090.6060.5930.6230.6470.3460.593
0.7500.0280.2180.2130.2240.2320.1240.213
0.7500.0350.2700.2640.2770.2880.1540.264
0.7500.0490.3700.3620.3810.3950.2110.362
0.7500.0650.4800.4700.4940.5120.2740.470
0.7500.0830.5970.5840.6140.6370.3400.584
0.7500.0950.6710.6560.6900.7160.3820.656
0.7500.1090.7530.7370.7740.8030.4290.737
0.7500.1200.8150.7980.8380.8690.4650.798
0.8750.0200.1840.1800.1900.1970.1050.180
0.8750.0280.2560.2500.2630.2730.1460.250
0.8750.0350.3170.3100.3260.3380.1810.310
0.8750.0490.4360.4270.4490.4650.2490.427
0.8750.0650.5680.5550.5840.6050.3240.555
0.8750.0830.7090.6940.7290.7560.4040.694
0.8750.0950.7990.7820.8210.8520.4550.782
0.8750.1090.9000.8810.9250.9600.5130.881
0.8750.1200.9770.9561.0041.0420.5570.956
1.0000.0280.2930.2870.3020.3130.1670.287
1.0000.0350.3640.3560.3740.3880.2080.356
1.0000.0490.5020.4920.5170.5360.2860.492
1.0000.0650.6550.6410.6740.6990.3730.641
1.0000.0830.8200.8030.8440.8750.4680.803
1.0000.0950.9270.9070.9530.9890.5280.907
1.0000.1091.0471.0251.0761.1170.5971.025
1.0000.1201.1381.1141.1701.2140.6491.114
1.0000.1341.2511.2241.2861.3350.7131.224
1.2500.0350.4580.4490.4710.4890.2610.449
1.2500.0490.6340.6210.6520.6770.3620.621
1.2500.0650.8300.8130.8540.8860.4730.813
1.2500.0831.0441.0221.0741.1140.5951.022
1.2500.0951.1831.1581.2161.2620.6741.158
1.2500.1091.3411.3121.3791.4300.7641.312
1.2500.1201.4621.4311.5031.5590.8331.431
1.2500.1341.6121.5781.6581.7200.9191.578
1.5000.0350.5530.5410.5680.5900.3150.541
1.5000.0490.7660.7500.7880.8180.4370.750
1.5000.0651.0060.9841.0341.0730.5730.984
1.5000.0831.2681.2411.3041.3530.7231.241
1.5000.0951.4391.4081.4791.5350.8201.408
1.5000.1091.6341.6001.6811.7440.9321.600
1.5000.1201.7851.7471.8361.9041.0181.747
1.5000.1341.9731.9312.0292.1051.1251.931
1.5000.1482.1572.1112.2182.3011.2302.111
2.0000.0350.7410.7260.7620.7910.4230.726
2.0000.0491.0311.0091.0601.0990.5871.009
2.0000.0651.3561.3271.3941.4460.7731.327
2.0000.0831.7151.6791.7641.8300.9781.679
2.0000.0951.9511.9092.0062.0811.1121.909
2.0000.1092.2222.1752.2852.3701.2672.175
2.0000.1202.4322.3802.5012.5941.3862.380
2.0000.1342.6952.6382.7712.8761.5372.638
2.0000.1482.9552.8923.0383.1521.6842.892
2.0000.1653.2643.1943.3563.4821.8613.194
Density Constant10.7810.5511.08411.506.14510.55
OD inchesAve. Wall inchesD/t RatioID inchesTube Cross Sectional Area (in2)Internal Area (in2)
0.2500.02012.500.2100.01450.0346
0.2500.0288.930.1940.01950.0296
0.2500.0357.140.1800.02360.0254
0.2500.0495.100.1520.03090.0181
0.2500.0653.850.1200.03780.0113
0.3750.02018.750.3350.02230.0881
0.3750.02813.390.3190.03050.0799
0.3750.03510.710.3050.03740.0731
0.3750.0497.650.2770.05020.0603
0.3750.0655.770.2450.06330.0471
0.5000.02025.000.4600.03020.1662
0.5000.02817.860.4440.04150.1548
0.5000.03514.290.4300.05110.1452
0.5000.04910.200.4020.06940.1269
0.5000.0657.690.3700.08880.1075
0.5000.0836.020.3340.10870.0876
0.6250.02031.250.5850.03800.2688
0.6250.02822.320.5690.05250.2543
0.6250.03517.860.5550.06490.2419
0.6250.04912.760.5270.08870.2181
0.6250.0659.620.4950.11440.1924
0.6250.0837.530.4590.14130.1655
0.6250.0956.580.4350.15820.1486
0.6250.1095.730.4070.17670.1301
0.7500.02826.790.6940.06350.3783
0.7500.03521.430.6800.07860.3632
0.7500.04915.310.6520.10790.3339
0.7500.06511.540.6200.13990.3019
0.7500.0839.040.5840.17390.2679
0.7500.0957.890.5600.19550.2463
0.7500.1096.880.5320.21950.2223
0.7500.1206.250.5100.23750.2043
0.8750.02043.750.8350.05370.5476
0.8750.02831.250.8190.07450.5268
0.8750.03525.000.8050.09240.5090
0.8750.04917.860.7770.12720.4742
0.8750.06513.460.7450.16540.4359
0.8750.08310.540.7090.20650.3948
0.8750.0959.210.6850.23280.3685
0.8750.1098.030.6570.26230.3390
0.8750.1207.290.6350.28460.3167
1.0000.02835.710.9440.08550.6999
1.0000.03528.570.9300.10610.6793
1.0000.04920.410.9020.14640.6390
1.0000.06515.380.8700.19090.5945
1.0000.08312.050.8340.23910.5463
1.0000.09510.530.8100.27010.5153
1.0000.1099.170.7820.30510.4803
1.0000.1208.330.7600.33180.4536
1.0000.1347.460.7320.36460.4208
1.2500.03535.711.1800.13361.0936
1.2500.04925.511.1520.18491.0423
1.2500.06519.231.1200.24200.9852
1.2500.08315.061.0840.30430.9229
1.2500.09513.161.0600.34470.8825
1.2500.10911.471.0320.39070.8365
1.2500.12010.421.0100.42600.8012
1.2500.1349.330.9820.46980.7574
1.5000.03542.861.4300.16111.6061
1.5000.04930.611.4020.22341.5438
1.5000.06523.081.3700.29301.4741
1.5000.08318.071.3340.36951.3977
1.5000.09515.791.3100.41931.3478
1.5000.10913.761.2820.47631.2908
1.5000.12012.501.2600.52021.2469
1.5000.13411.191.2320.57501.1921
1.5000.14810.141.2040.62861.1385
1.7500.03550.001.6800.18862.2167
1.7500.04940.821.9020.30032.8413
1.7500.06526.921.6200.34412.0612
1.7500.08321.081.5840.43471.9706
1.7500.09518.421.5600.49391.9113
1.7500.10916.061.5320.56191.8433
1.7500.12014.581.5100.61451.7908
1.7500.13413.061.4820.68031.7250
1.7500.14811.821.4540.74491.6604
1.7500.16510.611.4200.82161.5837
2.0000.03557.141.9300.21612.9255
2.0000.04940.821.9020.30032.8413
2.0000.06530.771.8700.39512.7465
2.0000.08324.101.8340.49992.6417
2.0000.09521.051.8100.56852.5730
2.0000.10918.351.7820.64752.4941
2.0000.12016.671.7600.70872.4328
2.0000.13414.931.7320.78552.3561
2.0000.14813.511.7040.86112.2805
2.0000.16512.121.6700.95122.1904
NPS Oustide DiameterSchedActual O.D. (in)Nom. Wall (in)MYS (PSI)MTS (PSI)Theoretical Burst Pressure * (PSI)Working Pressure (PSI) 25% of BurstTheoretical Yield Point ** (PSI)Collapse Pressure *** (PSI)
1/8"100.4050.04930,00075,00018,1484,5377,2596,381
1/8"400.4050.06830,00075,00025,1856,29610,0748,383
1/8"800.4050.09530,00075,00035,1858,79614,07410,773
1/4"100.5400.06530,00075,00018,0564,5147,2226,353
1/4"400.5400.08830,00075,00024,4446,1119,7788,184
1/4"800.5400.11930,00075,00033,0568,26413,22210,308
3/8"100.6780.06530,00075,00014,3813,5955,7525,201
3/8"400.6780.09130,00075,00020,1335,0338,0536,972
3/8"800.6780.12630,00075,00027,8766,96911,1509,078
1/2"50.8400.06530,00075,00011,6072,9024,6434,284
1/2"100.8400.08330,00075,00014,8213,7055,9295,343
1/2"400.8400.10930,00075,00019,4644,8667,7866,775
1/2"800.8400.14730,00075,00026,2506,56310,5008,663
3/4"51.0500.06530,00075,0009,2862,3213,7143,484
3/4"101.0500.08330,00075,00011,8572,9644,7434,368
3/4"401.0500.11330,00075,00016,1434,0366,4575,762
3/4"801.0500.15430,00075,00022,0005,5008,8007,509
1"51.3150.06530,00075,0007,4141,8542,9662,819
1"101.3150.10930,00075,00012,4333,1084,9734,561
1"401.3150.13330,00075,00015,1713,7936,0685,455
1"801.3150.17930,00075,00020,4185,1058,1677,056
1 1/4"51.6600.06530,00075,0005,8731,4682,3492,257
1 1/4"101.6600.10930,00075,0009,8492,4623,9403,681
1 1/4"401.6600.1430,00075,00012,6513,1635,0604,633
1 1/4"801.6600.19130,00075,00017,2594,3156,9046,109
1 1/2"51.9000.06530,00075,0005,1321,2832,0531,982
1 1/2"101.9000.10930,00075,0008,6052,1513,4423,245
1 1/2"401.9000.14530,00075,00011,4472,8624,5794,230
1 1/2"801.9000.230,00075,00015,7893,9476,3165,651
2"52.3750.06530,00075,0004,1051,0261,6421,597
2"102.3750.10930,00075,0006,8841,7212,7542,627
2"402.3750.15430,00075,0009,7262,4323,8913,638
2"802.3750.21830,00075,00013,7683,4425,5075,002
Reference Notes

Burst pressure estimates are based on using Barlow's Formula.

* Barlow’s Formula is expressed as:

Tubing - (2 * MTS * t)/d for estimating theoretical burst pressure.

Pipe - (2 * MTS * t)/D for estimating theoretical burst pressure.

For tubing, outside diameter (D) can be substituted in the calculation for a more conservative value, however the use of inside diameter (d) has been proven valid. The end user should determine the appropriate working pressure and safety factor for the specific application given all relevant operating conditions.

  • MTS = Minimum tensile strength (psi)
  • MYS = Minimum yield strength (psi)
  • t = Nominal wall thickness (inches)
  • d = Nominal inside diameter (inches)
  • D = Nominal outside diameter (inches)

Working pressure = 1/4 of theoretical burst pressure

Pressure ratings are based on 100° F operating environment only

** Theoretical yield pressure is the point of permanent deformation and calculated by substituting the MYS value in the equation.

*** Collapse pressure estimate shown is per API 5C3 calculation. Formula: (2 * MYS * (D/t - 1)) / (D/t)2

Weight per foot calculation = (Outside Diameter - Wall Thickness) x Wall Thickness x Grade Density Constant

Ferritic stainless steels include 409,410,430,439, among others.

Duplex stainless steels include lean duplexes, standard duplex 2205, and super duplex grades.

 

Webco manufactures tubular products to meet customer dimensional and materials specifications. Webco is not an engineering or design business. Any engineering information provided is purely incidental to Webco’s tube manufacturing process and not offered or intended to be engineering services related to the use of the product or performance specifications a customer may request or require. The identification of appropriate tube dimensional and materials specifications is the customer’s responsibility.  Notwithstanding any language in any document to the contrary,  WEBCO DOES NOT MAKE AND SPECIFICALLY DISCLAIMS ANY AND ALL EXPRESS OR IMPLIED WARRANTIES FOR FITNESS FOR A PARTICULAR PURPOSE, DESIGN AND MERCHANTABILITY.