Schedule 40 Steel Pipe
Schedule 40 Pipe size chart, dimensions, wall thickness and weight
| Nominal size [mm] | Outside diameter [mm] | Outside diameter [mm] | Wall thickness [mm] | Wall thickness [mm] | Weight [lb/ft] | Weight [kg/m] |
| 1/8 mm | 0.405 mm | 10.3 MM | 0.068 mm | 1.73 MM | 0.24 lb/ft | 0.37 kg/m |
| 1/4 mm | 0.540 mm | 13.7 MM | 0.088 mm | 2.24 MM | 0.42 lb/ft | 0.84 kg/m |
| 1/2 mm | 0.840 mm | 21.3 MM | 0.109 mm | 2.77 MM | 0.85 lb/ft | 1.27 kg/m |
| 3/4 mm | 1.050 mm | 26.7 MM | 0.113 mm | 2.87 MM | 1.13 lb/ft | 1.69 kg/m |
| 1 mm | 1.315 mm | 33.4 MM | 0.133 mm | 3.38 MM | 1.68 lb/ft | 2.50 kg/m |
| 1 1/4 mm | 1.660 mm | 42.2 MM | 0.140 mm | 3.56 MM | 2.27 lb/ft | 3.39 kg/m |
| 1 1/2 mm | 1.900 mm | 48.3 MM | 0.145 mm | 3.68 MM | 2.72 lb/ft | 4.05 kg/m |
| 2 mm | 2.375 mm | 60.3 MM | 0.154 mm | 3.91 MM | 3.65 lb/ft | 5.44 kg/m |
| 2 1/2 mm | 2.875 mm | 73.0 MM | 0.203 mm | 5.16 MM | 5.79 lb/ft | 8.63 kg/m |
| 3 mm | 3.500 mm | 88.9 MM | 0.216 mm | 5.49 MM | 7.58 lb/ft | 11.29 kg/m |
| 3 1/2 mm | 4.000 mm | 101.6 MM | 0.226 mm | 5.74 MM | 9.11 lb/ft | 13.57 kg/m |
| 4 mm | 4.500 mm | 114.3 MM | 0.237 mm | 6.02 MM | 10.79 lb/ft | 16.07 kg/m |
| 5 mm | 5.563 mm | 141.3 MM | 0.258 mm | 6.55 MM | 14.62 lb/ft | 21.77 kg/m |
| 6 mm | 6.625 mm | 168.3 MM | 0.280 mm | 7.11 MM | 18.97 lb/ft | 28.26 kg/m |
| 8 mm | 8.625 mm | 219.1 MM | 0.322 mm | 8.18 MM | 28.55 lb/ft | 42.55 kg/m |
| 10 mm | 10.750 mm | 273.0 MM | 0.365 mm | 9.27 MM | 40.48 lb/ft | 60.31 kg/m |
| 12 mm | 12.750 mm | 323.8 MM | 0.406 mm | 10.31 MM | 53.52 lb/ft | 79.73 kg/m |
| 14 mm | 14 mm | 355.6 MM | 0.375 mm | 11.13 MM | 54.57 lb/ft | 94.55 kg/m |
| 16 mm | 16 mm | 406.4 MM | 0.500 mm | 12.70 MM | 82.77 lb/ft | 123.30 kg/m |
| 18 mm | 18 mm | 457.0 MM | 0.562 mm | 14.27 MM | 104.67 lb/ft | 155.80 kg/m |
| 20 mm | 20 mm | 508.0 MM | 0.594 mm | 15.09 MM | 123.11 lb/ft | 183.42 kg/m |
| 24 mm | 24 mm | 610.0 MM | 0.688 mm | 17.48 MM | 171.29 lb/ft | 255.41 kg/m |
| 32 mm | 32 mm | 813.0 MM | 0.688 mm | 17.48 MM | 230.08 lb/ft | 342.91 kg/m |
SCH 40 Nominal pipe size (NPS)
| NPS | 1/2 | 3/4 | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 3½ | 4 |
| DN | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 90 | 100 |
Schedule 40 Carbon Steel Pipe Pressure Rating
| Maximum Allowable Pressure (psi) (kPa) | ||
| NPS | Outside Diameter (OD) | Schedule |
| (in) | (in) (mm) | 40 |
| 1/4 | 0.54 13.7 | 7985 55057 |
| 3/8 | 0.675 17.1 | 6606 45548 |
| 1/2 | 0.84 21.3 | 6358 43838 |
| 3/4 | 1.05 26.7 | 5273 36357 |
| 1 | 1.315 33.4 | 4956 34172 |
| 1 1/4 | 1.66 42.2 | 4133 28497 |
| 1 1/2 | 1.9 48.3 | 3739 25780 |
| 2 | 2.375 60.3 | 3177 21905 |
| 2 1/2 | 2.875 73 | 3460 23857 |
| 3 | 3.5 88.9 | 3024 20850 |
| 3 1/2 | 4 102 | 2769 19092 |
| 4 | 4.5 114 | 2581 17796 |
| 5 | 5.563 141 | 2273 15672 |
| 6 | 6.625 168 | 2071 14280 |
| 8 | 8.625 219 | 1829 12611 |
| 10 | 10.75 273 | 1664 11473 |
| 12 | 12.75 324 | 1560 10756 |
| 14 | 14 356 | 1533 10570 |
| 16 | 16 406 | 1531 10556 |
| 18 | 18 457 | 1530 10549 |
| 20 | 20 508 | 1455 10032 |
| 22 | 22 559 | |
| 24 | 24 610 | 1405 9687 |
| 30 | 30 762 | |
| 32 | 32 813 | 1054 7267 |
| 34 | 34 864 | 992 6840 |
| 36 | 36 914 | 1021 7040 |
| 42 | 42 1067 | 875 6033 |
Schedule 40 Pipe Dimensions and Wall Thickness
| Pipe Sizes* | O.D. (in.) | Schedule (40) Pipe Wall Thickness (in.)** |
|
| Sch.40 | |||
| Wall (in) | I.D. (in) | ||
| 1/8″ | 0.41 od | 0.07 in | 0.269 id |
| Weight (lbs/ft.) | Steel | 0.247 lbs/ft | |
| Stainless | |||
| Aluminum | |||
| 1/4″ | 0.54 od | 0.090 in | 0.364 id |
| Weight (lbs/ft.) | Steel | 0.429 lbs/ft | |
| Stainless | |||
| Aluminum | 0.147 lbs/ft | ||
| 3/8″ | 0.675 od | 0.091 in | 0.493 id |
| Weight (lbs/ft.) | Steel | 0.570 lbs/ft | |
| Stainless | |||
| Aluminum | 0.196 lbs/ft | ||
| 1/2″ | 0.840 od | 0.109 in | 0.622 id |
| Weight (lbs/ft.) | Steel | 0.850 lbs/ft | |
| Stainless | |||
| Aluminum | 0.294 lbs/ft | ||
| 3/4″ | 1.050 od | 0.113 in | 0.824 id |
| Weight (lbs/ft.) | Steel | 1.13 lbs/ft | |
| Stainless | |||
| Aluminum | 0.391 | ||
| 1″ | 1.315 od | 0.133 in | 1.049 id |
| Weight (lbs/ft.) | Steel | 1.68 lbs/ft | |
| Stainless | |||
| Aluminum | 0.581 lbs/ft | ||
| 1-1/4″ | 1.66 od | 0.140 in | 1.380 id |
| Weight (lbs/ft.) | Steel | 2.27 lbs/ft | |
| Stainless | |||
| Aluminum | 0.785 lbs/ft | ||
| 1-1/2″ | 1.90 od | 0.145 in | 1.610 id |
| Weight (lbs/ft.) | Steel | 2.72 lbs/ft | |
| Stainless | |||
| Aluminum | 0.939 lbs/ft | ||
| 2″ | 2.375 od | 0.154 in | 2.067 id |
| Weight (lbs/ft.) | Steel | 3.66 lbs/ft | |
| Stainless | |||
| Aluminum | 1.260 lbs/ft | ||
| 2-1/2″ | 2.875 od | 0.203 in | 2.469 id |
| Weight (lbs/ft.) | Steel | 5.80 lbs/ft | |
| Stainless | |||
| Aluminum | 2.000 lbs/ft | ||
| 3″ | 3.50 od | 0.216 in | 3.068 id |
| Weight (lbs/ft.) | Steel | 7.58 lbs/ft | |
| Stainless | |||
| Aluminum | 2.620 lbs/ft | ||
| 3-1/2″ | 4.00 od | 0.226 in | 3.550 id |
| Weight (lbs/ft.) | Steel | 9.12 lbs/ft | |
| Stainless | |||
| Aluminum | 3.150 lbs/ft | ||
| 4″ | 4.50 od | 0.237 in | 4.026 id |
| Weight (lbs/ft.) | Steel | 10.80 lbs/ft | |
| Stainless | |||
| Aluminum | 3.730 lbs/ft | ||
| 5″ | 5.563 od | 0.258 in | 5.047 id |
| Weight (lbs/ft.) | Steel | 14.63 lbs/ft | |
| Stainless | |||
| Aluminum | 5.050 lbs/ft | ||
| 6″ | 6.625 od | 0.280 in | 6.065 id |
| Weight (lbs/ft.) | Steel | 18.99 lbs/ft | |
| Stainless | |||
| Aluminum | 6.560 lbs/ft | ||
| 8″ | 8.625 od | 0.322 in | 7.981 id |
| Weight (lbs/ft.) | Steel | 28.58 lbs/ft | |
| Stainless | |||
| Aluminum | 9.88 lbs/ft | ||
| *Nominal sizes apply – Pipe Size is the generic Industry Size Standard for reference only **Tolerances may vary slightly from each manufacturer | |||