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Stainless Seamless Pipe Specifications and Information


T304/304H A312, SA312
T304/304L A312, SA312
T316/316L A312, SA312

Lengths: 17' - 24' Random Lengths



Tolerances
NPS Designator Permissible Variations in Outside Diameter
Over In. Under In.
1/8 to 1-1/2, incl 1/64 (0.015) 1/32 (0.031)
Over 1-1/2 to 4, incl 1/32 (0.031) 1/32 (0.031)
Over 4 to 8, incl 1/16 (0.062) 1/32 (0.031)
Over 8 to 18, incl 3/23 (0.093) 1/32 (0.031)

Nominal Wall Thickness
NPS Designator Outside Diameter in. Schedule 10S in. Schedule 40S in. Schedule 80S in. Schedule 160 in. Schedule XX in.
1/4 0.540 0.065 0.088 0.119    
3/8 0.675 0.065 0.091 0.126    
1/2 0.840 0.083 0.109 0.147 .188 .294
3/4 1.050 0.083 0.113 0.154 .218 .308
1.0 1.315 0.109 0.133 0.179 .250 .358
1 1/4 1.660 0.109 0.140 0.191 .250 .382
1 1/2 1.900 0.109 0.145 0.200 .281 .400
2 2.375 0.109 0.154 0.218 .343 .436
2 1/2 2.875 0.120 0.203 0.276 .375 .552
3 3.500 0.120 0.216 0.300 .438 .600
3 1/2 4.000 0.120 0.226 0.318   .636
4 4.500 0.120 0.237 0.337 .534 .674
5 5.563 0.134 0.258 0.375 .625 .750
6 6.625 0.134 0.280 0.432 .719 .864
8 8.625 0.148 0.322 0.500 .906 .875
10 10.750 0.165 0.365 0.500 1.125  
12 12.750 0.180 0.375 0.500 1.312  
14 14.000 0.188 0.375 0.500 1.406  
16 16.000 0.188 0.375 0.500 1.594  
Nominal Wall Tolerance Plus 12.5%, Minus 12.5%

These do not conform to the American National Standard for Welded and Seamless Wrought Steel Pipe
(ANSI B 36.10 - 1979)

Minimum Wall Thicknesses on Inspection for Nominal Pipe Wall Thicknesses
Nominal Thickness Minimum Thickness on Inspection Nominal Thickness Minimum Thickness on Inspection Nominal Thickness Minimum Thickness on Inspection
in. mm in mm in mm in mm in mm in mm
0.068 1.7 0.060 1.5 0.294 7.5 0.257 6.5 0.750 19.0 0.658 16.6
0.068 2.2 0.077 2.0 0.300 7.6 0.262 6.7 0.812 20.6 0.710 18.0
0.091 2.3 0.080 2.0 0.307 7.8 0.269 6.8 0.843 21.4 0.736 18.7
0.095 2.4 0.083 2.1 0.308 7.8 0.270 6.9 0.854 21.7 0.756 19.2
0.113 2.9 0.099 2.5 0.312 7.9 0.273 6.9 0.875 22.2 0.766 19.5
0.119 3.0 0.104 2.6 0.318 8.1 0.278 7.1 0.906 23.0 0.783 20.1
0.125 3.2 0.109 2.8 0.322 8.2 0.282 7.2 0.937 23.8 0.820 20.8
0.126 3.2 0.110 2.8 0.330 8.4 0.289 7.3 0.968 24.6 0.847 21.5
0.133 3.4 0.116 2.9 0.337 8.6 0.295 7.5 1.000 25.4 0.875 22.2
0.140 3.6 0.122 3.1 0.343 8.7 0.300 7.6 1.031 26.2 0.902 22.9
0.145 3.7 0.127 3.2 0.344 8.7 0.301 7.6 1.062 27.0 0.929 23.6
0.147 3.7 0.129 3.3 0.358 9.1 0.313 8.0 1.083 27.8 0.956 24.3
0.154 3.9 0.135 3.4 0.365 9.3 0.319 8.1 1.125 28.6 0.984 25.0
0.156 4.0 0.136 3.5 0.375 9.5 0.328 8.3 1.156 29.4 1.012 25.7
0.179 4.5 0.157 4.0 0.382 9.7 0.334 8.5 1.218 30.9 1.066 27.1
0.187 43.7 0.164 4.2 0.400 10.2 0.350 8.9 1.250 31.8 1.094 27.8
0.188 4.8 0.164 4.2 0.406 10.3 0.355 9.0 1.281 32.5 1.121 28.5
0.191 4.9 0.167 4.2 0.432 10.4 0.378 9.6 1.312 33.3 1.148 29.2
0.200 5.1 0.175 4.4 0.436 11.1 0.382 9.7 1.343 34.1 1.175 29.8
0.203 5.2 0.178 4.5 0.437 11.1 0.382 9.7 1.375 34.9 1.203 30.6
0.216 5.5 0.189 4.8 0.438 11.1 0.383 9.7 1.406 35.7 1.230 31.2
0.218 5.5 0.191 4.9 0.500 12.7 0.438 11.1 1.436 36.5 1.258 32.0
0.219 5.6 0.192 4.9 0.531 13.5 0.465 11.8 1.500 36.1 1.312 33.3
0.226 5.7 0.196 5.0 0.552 14.0 0.483 12.3 1.531 38.9 1.340 34.0
0.237 6.0 0.207 5.2 0.562 14.3 0.492 12.5 1.562 39.7 1.367 34.7
0.250 6.4 0.219 5.6 0.593 15.1 0.519 13.2 1.593 40.5 1.394 35.4
0.258 6.6 0.226 5.7 0.600 15.2 0.525 13.3 1.750 44.5 1.531 38.9
0.276 7.0 0.242 6.1 0.625 15.9 0.547 13.9 1.781 45.2 1.558 39.6
0.277 7.0 0.242 6.1 0.656 16.6 0.573 14.6 1.812 46.0 1.586 49.3
0.279 7.1 0.244 6.2 0.674 17.1 0.590 15.0 1.968 50.0 1.772 43.7
0.280 7.1 0.245 6.2 0.687 17.4 0.601 15.3 2.062 52.4 1.804 45.8
0.281 7.1 0.246 6.2 0.719 18.3 0.629 16.0 2.343 59.5 2.050 52.1
Note 1 - The following equation, upon which this table is based, may be applied to calculate minimum wall thicknesses from nominal wall thickness:

tn * 0.875 = tm

Where:
tn = nominal wall thickness, in. [mm], and
tm= minimum wall thicknesses, in. [mm]
The wall thickness is inch-pound units is rounded to three decimal places in accordance with the rounding method of Practice E29. The wall thickness in SI units is rounded to one decimal place in accordance with the rounding method of Practice E29.

Note 2 - This table is a master table covering wall thicknesses available in the purchase of different classifications of pipe, but it is not meant to imply that all the walls listed herein are necessarily obtainable for the applicable product specification.
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