Schedule 5 Pipe Dimensions
Wall thickness, bore and plain-end weight for all 25 sizes ASME B36.10M publishes in schedule 5, NPS 1/8 through NPS 30.
- Schedule
- Schedule 5
- Sizes published
- 25 (NPS 1/8 to NPS 30)
- Thinnest wall
- 0.035 in (0.9 mm) at NPS 1/8
- Thickest wall
- 0.250 in (6.3 mm) at NPS 30
- Standard
- ASME B36.10M
Dimensions are given in inches, with the millimetre equivalent beneath in grey.
| Size | DN | Outside diameter | Wall thickness | Inside diameter | Weight, empty | Water (US gal/ft) | This size |
|---|---|---|---|---|---|---|---|
| NPS 1/8 | DN 6 | 0.40510.29 mm | 0.0350.89 mm | 0.3358.51 mm | 0.140.21 kg/m | 0.005 | detail → |
| NPS 1/4 | DN 8 | 0.54013.72 mm | 0.0491.24 mm | 0.44211.23 mm | 0.260.38 kg/m | 0.008 | detail → |
| NPS 3/8 | DN 10 | 0.67517.14 mm | 0.0491.24 mm | 0.57714.66 mm | 0.330.49 kg/m | 0.014 | detail → |
| NPS 1/2 | DN 15 | 0.84021.34 mm | 0.0651.65 mm | 0.71018.03 mm | 0.540.80 kg/m | 0.021 | detail → |
| NPS 3/4 | DN 20 | 1.05026.67 mm | 0.0651.65 mm | 0.92023.37 mm | 0.681.02 kg/m | 0.035 | detail → |
| NPS 1 | DN 25 | 1.31533.40 mm | 0.0651.65 mm | 1.18530.10 mm | 0.871.29 kg/m | 0.057 | detail → |
| NPS 1 1/4 | DN 32 | 1.66042.16 mm | 0.0651.65 mm | 1.53038.86 mm | 1.111.65 kg/m | 0.096 | detail → |
| NPS 1 1/2 | DN 40 | 1.90048.26 mm | 0.0651.65 mm | 1.77044.96 mm | 1.271.90 kg/m | 0.128 | detail → |
| NPS 2 | DN 50 | 2.37560.32 mm | 0.0651.65 mm | 2.24557.02 mm | 1.602.39 kg/m | 0.206 | detail → |
| NPS 2 1/2 | DN 65 | 2.87573.02 mm | 0.0832.11 mm | 2.70968.81 mm | 2.473.68 kg/m | 0.299 | detail → |
| NPS 3 | DN 80 | 3.50088.90 mm | 0.0832.11 mm | 3.33484.68 mm | 3.034.51 kg/m | 0.454 | detail → |
| NPS 3 1/2 | DN 90 | 4.000101.60 mm | 0.0832.11 mm | 3.83497.38 mm | 3.475.17 kg/m | 0.600 | detail → |
| NPS 4 | DN 100 | 4.500114.30 mm | 0.0832.11 mm | 4.334110.08 mm | 3.925.83 kg/m | 0.766 | detail → |
| NPS 5 | DN 125 | 5.563141.30 mm | 0.1092.77 mm | 5.345135.76 mm | 6.359.45 kg/m | 1.166 | detail → |
| NPS 6 | DN 150 | 6.625168.27 mm | 0.1092.77 mm | 6.407162.74 mm | 7.5911.29 kg/m | 1.675 | detail → |
| NPS 8 | DN 200 | 8.625219.07 mm | 0.1092.77 mm | 8.407213.54 mm | 9.9114.75 kg/m | 2.884 | detail → |
| NPS 10 | DN 250 | 10.750273.05 mm | 0.1343.40 mm | 10.482266.24 mm | 15.1922.61 kg/m | 4.483 | detail → |
| NPS 12 | DN 300 | 12.750323.85 mm | 0.1563.96 mm | 12.438315.93 mm | 20.9831.23 kg/m | 6.312 | detail → |
| NPS 14 | DN 350 | 14.000355.60 mm | 0.1563.96 mm | 13.688347.68 mm | 23.0734.33 kg/m | 7.644 | detail → |
| NPS 16 | DN 400 | 16.000406.40 mm | 0.1654.19 mm | 15.670398.02 mm | 27.9041.53 kg/m | 10.018 | detail → |
| NPS 18 | DN 450 | 18.000457.20 mm | 0.1654.19 mm | 17.670448.82 mm | 31.4346.77 kg/m | 12.739 | detail → |
| NPS 20 | DN 500 | 20.000508.00 mm | 0.1884.78 mm | 19.624498.45 mm | 39.7859.20 kg/m | 15.712 | detail → |
| NPS 22 | DN 550 | 22.000558.80 mm | 0.1884.78 mm | 21.624549.25 mm | 43.8065.18 kg/m | 19.078 | detail → |
| NPS 24 | DN 600 | 24.000609.60 mm | 0.2185.54 mm | 23.564598.53 mm | 55.3782.40 kg/m | 22.655 | detail → |
| NPS 30 | DN 750 | 30.000762.00 mm | 0.2506.35 mm | 29.500749.30 mm | 79.43118.21 kg/m | 35.506 | detail → |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Common questions
What sizes is schedule 5 pipe made in?
ASME B36.10M publishes schedule 5 in 25 sizes, from NPS 1/8 through NPS 30. Wall thickness runs from 0.035 in (0.9 mm) at the small end to 0.250 in (6.3 mm) at the large end.
Does schedule 5 mean the same wall thickness in every size?
No. A schedule number is a series, not a thickness. It sets a wall that rises with the pipe size so the pressure rating stays roughly constant across the range — which is the whole point of the schedule system.