5 inch (DN 125) pipe dimensions & weight
5 inch (DN 125) steel pipe has an outside diameter of 141.3 mm (5.563 in) in every schedule. Below: wall thickness, inside diameter, weight per metre and water capacity for each ASME B36.10M / B36.19M schedule.
| Schedule | Wall (mm) | Wall (in) | ID (mm) | CS kg/m | CS lb/ft | SS 304 kg/m | Water L/m |
|---|---|---|---|---|---|---|---|
| Sch 5S | 2.77 | 0.109 | 135.76 | 9.46 | 6.36 | 9.56 | 14.48 |
| Sch 10S | 3.40 | 0.134 | 134.50 | 11.56 | 7.77 | 11.68 | 14.21 |
| STD | 6.55 | 0.258 | 128.20 | 21.77 | 14.63 | 21.99 | 12.91 |
| Sch 40 | 6.55 | 0.258 | 128.20 | 21.77 | 14.63 | 21.99 | 12.91 |
| XS | 9.53 | 0.375 | 122.24 | 30.97 | 20.81 | 31.29 | 11.74 |
| Sch 80 | 9.53 | 0.375 | 122.24 | 30.97 | 20.81 | 31.29 | 11.74 |
| Sch 120 | 12.70 | 0.500 | 115.90 | 40.28 | 27.07 | 40.69 | 10.55 |
| Sch 160 | 15.88 | 0.625 | 109.54 | 49.11 | 33.00 | 49.61 | 9.42 |
| XXS | 19.05 | 0.750 | 103.20 | 57.43 | 38.59 | 58.02 | 8.36 |
CS = carbon steel (7.85 g/cm³). SS 304 at 7.93 g/cm³; for 316 multiply CS weight by 1.017. Water capacity = internal volume per metre.
Matching 5" flanges and fittings
| Class 150 flange | OD 255 mm · thk 22.3 mm · PCD 215.9 mm · 8 × 3/4" bolts |
| Class 300 flange | OD 280 mm · thk 33.4 mm · PCD 235.0 mm · 8 × 3/4" bolts |
| B16.9 fittings | 90° LR 190 mm · 45° LR 79 mm · 90° SR 127 mm · tee 124 mm · reducer 127 mm · cap 76 mm |
Full tables: Class 150 · Class 300 · B16.9 fittings.
Frequently asked questions
What is the OD of 5 inch pipe?
5 inch (DN 125) pipe has an outside diameter of 141.3 mm (5.563 in), regardless of schedule.
What is the wall thickness of 5 inch Schedule 40 pipe?
6.55 mm (0.258 in), giving an inside diameter of 128.20 mm.
How much does 5 inch Schedule 40 pipe weigh?
About 21.77 kg/m (14.63 lb/ft) in carbon steel, or 130.6 kg for a 6 m length.
What is the wall thickness of 5 inch Schedule 80 pipe?
9.53 mm, with an inside diameter of 122.24 mm and weight of 30.97 kg/m.
Last updated 2026-11-02