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Dimensions of Steel Pipe
 

Dimensions of Welded and Seamless Steel Pipe (ASME B36.10)

(Listed by Schedule Number)
Pipe Size Diameter  10 20 30 40 60 80 100 120 140 160
 
1/2 0.84 - - - 0.109 - 0.147 - - - 0.188
3/4 1.050 - - - 0.113 - 0.154 - - - 0.219
1 1.315 - - - 0.133 - 0.179 - - - 0.250
1 1/4 1.660 - - - 0.140 - 0.191 - - - 0.250
1 1/2 1.900 - - - 0.145 - 0.200 - - - 0.281
2 2.375 - - - 0.154 - 0.218 - - - 0.344
2 1/2 2.875 - - - 0.203 - 0.276 - - - 0.375
3 3.500 - - - 0.216 - 0.300 - - - 0.438
3 1/2 4.000 - - - 0.226 - 0.318 - - - -
4 4.500 - - - 0.237 - 0.337 - - - 0.531
5 5.563 - - - 0.258 - 0.375 - 0.500 - 0.625
6 6.625 - - - 0.280 - 0.432 - 0.562 - 0.719
8 8.625 - 0.250 0.277 0.322 0.406 0.500 0.594 0.719 0.812 0.906
10 10.750 - 0.250 0.307 0.365 0.500 0.594 0.719 0.844 1.000 1.125
12 12.750 - 0.250 0.330 0.406 0.562 0.688 0.844 1.000 1.125 1.312
14 14.000 0.250 0.312 0.375 0.438 0.594 0.750 0.938 1.094 1.250 1.406
16 16.000 0.250 0.312 0.375 0.500 0.656 0.844 1.031 1.219 1.438 1.594
18 18.000 0.250 0.312 0.438 0.562 0.750 0.938 1.156 1.375 1.562 1.781
20 20.000 0.250 0.375 0.500 0.594 0.812 1.031 1.281 1.500 1.750 1.969
24 24.000 0.250 0.375 0.562 0.688 0.969 1.219 1.531 1.812 2.062 2.344
 
Weldbend Notes:
  1. For each of the pipe sizes listed in above chart, consider their thicknesses (in decimals) as nominal dimensions as listed in ANSI B36.10.
  2. Tolerances relating to wall thickness can be found in sections dealing with material specifications.
  3. It is possible some of the larger heavier wall sections are beyond seamless mill production capabilities and should be sourced from turned-and-bored billets or other manufacturing possibilities.
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