3 inch Sch 160 pipe dimensions & weight
3 inch Sch 160 pipe (DN 80) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 3" (DN 80) |
| Schedule | Sch 160 |
| Outside diameter | 88.9 mm (3.500 in) |
| Wall thickness | 11.13 mm (0.438 in) |
| Inside diameter | 66.64 mm (2.624 in) |
| Weight — carbon steel | 21.35 kg/m · 14.35 lb/ft |
| Weight — SS 304 / SS 316 | 21.57 / 21.70 kg/m |
| 6 m length (CS) | 128.1 kg |
| 20 ft length (CS) | 130.1 kg |
| Flow area | 34.88 cm² |
| Water capacity | 3.488 L/m |
| Outer surface (painting) | 0.2793 m²/m |
| Approx. max. working pressure* | 331 bar (4,803 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 3": Sch 10S · Sch 40 · Sch 80 · XXS · all 3" schedules
Frequently asked questions
What is the ID of 3 inch Sch 160 pipe?
66.64 mm (2.624 in), with OD 88.9 mm and wall 11.13 mm.
What is the weight of 3 inch Sch 160 pipe?
21.35 kg/m (14.35 lb/ft) in carbon steel; 128.1 kg per 6 m length.
What pressure can 3 inch Sch 160 pipe take?
Roughly 331 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