16 inch (DN 400) pipe dimensions & weight
16 inch (DN 400) steel pipe has an outside diameter of 406.4 mm (16.000 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 | 4.19 | 0.165 | 398.02 | 41.56 | 27.93 | 41.98 | 124.42 |
| Sch 10S | 4.78 | 0.188 | 396.84 | 47.34 | 31.81 | 47.82 | 123.69 |
| Sch 10 | 6.35 | 0.250 | 393.70 | 62.64 | 42.09 | 63.28 | 121.74 |
| Sch 20 | 7.92 | 0.312 | 390.56 | 77.83 | 52.30 | 78.62 | 119.80 |
| Sch 30 | 9.53 | 0.375 | 387.34 | 93.27 | 62.68 | 94.22 | 117.84 |
| STD | 9.53 | 0.375 | 387.34 | 93.27 | 62.68 | 94.22 | 117.84 |
| Sch 40 | 12.70 | 0.500 | 381.00 | 123.30 | 82.86 | 124.56 | 114.01 |
| Sch 60 | 16.66 | 0.656 | 373.08 | 160.12 | 107.60 | 161.75 | 109.32 |
| XS | 12.70 | 0.500 | 381.00 | 123.30 | 82.86 | 124.56 | 114.01 |
| Sch 80 | 21.44 | 0.844 | 363.52 | 203.53 | 136.77 | 205.60 | 103.79 |
| Sch 100 | 26.19 | 1.031 | 354.02 | 245.56 | 165.02 | 248.06 | 98.43 |
| Sch 120 | 30.96 | 1.219 | 344.48 | 286.64 | 192.62 | 289.56 | 93.20 |
| Sch 140 | 36.53 | 1.438 | 333.34 | 333.19 | 223.90 | 336.59 | 87.27 |
| Sch 160 | 40.49 | 1.594 | 325.42 | 365.36 | 245.52 | 369.08 | 83.17 |
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 16" flanges and fittings
| Class 150 flange | OD 595 mm · thk 35.0 mm · PCD 539.8 mm · 16 × 1" bolts |
| Class 300 flange | OD 650 mm · thk 55.6 mm · PCD 571.5 mm · 20 × 1-1/4" bolts |
| B16.9 fittings | 90° LR 610 mm · 45° LR 254 mm · 90° SR 406 mm · tee 305 mm · reducer 356 mm · cap 178 mm |
Full tables: Class 150 · Class 300 · B16.9 fittings.
Frequently asked questions
What is the OD of 16 inch pipe?
16 inch (DN 400) pipe has an outside diameter of 406.4 mm (16.000 in), regardless of schedule.
What is the wall thickness of 16 inch Schedule 40 pipe?
12.70 mm (0.500 in), giving an inside diameter of 381.00 mm.
How much does 16 inch Schedule 40 pipe weigh?
About 123.30 kg/m (82.86 lb/ft) in carbon steel, or 739.8 kg for a 6 m length.
What is the wall thickness of 16 inch Schedule 80 pipe?
21.44 mm, with an inside diameter of 363.52 mm and weight of 203.53 kg/m.
Last updated 2026-11-02