20 inch Sch 160 pipe dimensions & weight
20 inch Sch 160 pipe (DN 500) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 20" (DN 500) |
| Schedule | Sch 160 |
| Outside diameter | 508.0 mm (20.000 in) |
| Wall thickness | 50.01 mm (1.969 in) |
| Inside diameter | 407.98 mm (16.062 in) |
| Weight — carbon steel | 564.81 kg/m · 379.55 lb/ft |
| Weight — SS 304 / SS 316 | 570.57 / 574.16 kg/m |
| 6 m length (CS) | 3388.9 kg |
| 20 ft length (CS) | 3443.1 kg |
| Flow area | 1307.28 cm² |
| Water capacity | 130.728 L/m |
| Outer surface (painting) | 1.5959 m²/m |
| Approx. max. working pressure* | 255 bar (3,701 psi) — A106 Gr B |
*Approximate ASME B31.3 straight-pipe rating at ≤ 38 °C for seamless A106 Gr B (S = 137.9 MPa, E = 1, 12.5% mill tolerance, no corrosion allowance). Use the wall thickness calculator for your own design conditions.
Other schedules for 20": Sch 10S · Sch 40 · Sch 80 · all 20" schedules
Frequently asked questions
What is the ID of 20 inch Sch 160 pipe?
407.98 mm (16.062 in), with OD 508.0 mm and wall 50.01 mm.
What is the weight of 20 inch Sch 160 pipe?
564.81 kg/m (379.55 lb/ft) in carbon steel; 3388.9 kg per 6 m length.
What pressure can 20 inch Sch 160 pipe take?
Roughly 255 bar at ambient for seamless A106 Gr B under ASME B31.3 with no corrosion allowance; actual rating depends on material, temperature and code.
Last updated 2026-11-02