Views: 3 Author: Monica Publish Time: 2026-02-09 Origin: Site
Schedule 80 or 80S for stainless steel pipes feature thicker walls than Schedule 40 or lower schedules, making them suitable for high-pressure, high-temperature, and corrosive service.
Dimensions follow ASME B36.10M and ASME B36.19M. Wall thicknesses are identical except for NPS 10 and NPS 12 in Schedule 80S, which use a thinner wall of 0.500 in.
Weights below are based on stainless steel density. Nickel alloy pipes use the same dimensions; weights vary slightly by alloy density.
NPS (DN) | Outside Diameter, (inch) | Outside Diameter, (mm) | Wall Thickness (inch) | Wall Thickness (mm) | Plain End | Plain End |
1/8(6) | 0.405 | 10.29 | 0.095 | 2.41 | 0.31 | 0.47 |
1/4(8) | 0.54 | 13.72 | 0.119 | 3.02 | 0.54 | 0.80 |
3/8(10) | 0.675 | 17.14 | 0.126 | 3.20 | 0.74 | 1.10 |
1/2(15) | 0.840 | 21.34 | 0.147 | 3.73 | 1.09 | 1.62 |
3/4(20) | 1.050 | 26.67 | 0.154 | 3.91 | 1.48 | 2.19 |
1(25) | 1.315 | 33.40 | 0.179 | 4.55 | 2.17 | 3.24 |
1 1/4 (32) | 1.660 | 42.16 | 0.191 | 4.85 | 3 | 4.46 |
1 1/2 (40) | 1.900 | 48.26 | 0.2 | 5.08 | 3.63 | 5.41 |
2(50) | 2.375 | 60.32 | 0.218 | 5.54 | 5.03 | 7.48 |
2 1/2(65) | 2.875 | 73.02 | 0.276 | 7.01 | 7.67( | 11.41 |
3(80) | 3.500 | 88.90 | 0.3 | 7.62 | 10.26 | 15.27 |
3 1/2(90) | 4.000 | 101.60 | 0.318 | 8.08 | 12.52 | 18.64 |
4(100) | 4.500 | 114.30 | 0.337 | 8.56 | 15 | 22.32 |
5(125) | 5.563 | 141.30 | 0.375 | 9.52 | 20.8 | 30.94 |
6(150) | 6.625 | 168.28 | 0.432 | 10.97 | 28.6 | 42.56 |
8(200) | 8.625 | 219.08 | 0.5 | 12.70 | 43.43 | 64.64 |
10(250) | 10.75 | 273.0 | 0.5 | 12.70 | 54.79 | 81.53 |
12(300) | 12.75 | 323.8 | 0.5 | 12.70 | 65.48 | 97.44 |
14(350) | 14 | 355.6 | 0.5 | 12.70 | 72.16 | 107.40 |
16(400) | 16 | 406.4 | 0.5 | 12.70 | 82.85 | 123.31 |
18(450) | 18 | 457.2 | 0.5 | 12.70 | 93.54 | 139.16 |
20(500) | 20 | 508.0 | 0.5 | 12.70 | 104.23 | 155.13 |
22(550) | 22 | 558.8 | ... | ... | ... | ... |
24(600) | 24 | 609.6 | 0.5 | 12.70 | 125.61 | 186.95 |
30(750) | 30 | 762.0 | ... | ... | ... | ... |
Notes
Inside diameter = OD – 2 × wall thickness.
Weights are plain-end (no threads/couplings).
Tolerances per ASME B36.19M / B36.10M.
For exact project requirements or special alloys, contact us for custom calculations.
These data are standard and verified against ASME specifications. We supply seamless and welded Schedule 80 stainless steel and nickel alloy pipes in grades such as TP304/304L, TP316/316L, Alloy 625, Alloy 825, and others.
