3 inch Sch 40 pipe dimensions & weight
3 inch Sch 40 pipe (DN 80) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 3" (DN 80) |
| Schedule | Sch 40 |
| Outside diameter | 88.9 mm (3.500 in) |
| Wall thickness | 5.49 mm (0.216 in) |
| Inside diameter | 77.92 mm (3.068 in) |
| Weight — carbon steel | 11.29 kg/m · 7.59 lb/ft |
| Weight — SS 304 / SS 316 | 11.41 / 11.48 kg/m |
| 6 m length (CS) | 67.7 kg |
| 20 ft length (CS) | 68.8 kg |
| Flow area | 47.69 cm² |
| Water capacity | 4.769 L/m |
| Outer surface (painting) | 0.2793 m²/m |
| Approx. max. working pressure* | 156 bar (2,259 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 80 · Sch 160 · XXS · all 3" schedules
Frequently asked questions
What is the ID of 3 inch Sch 40 pipe?
77.92 mm (3.068 in), with OD 88.9 mm and wall 5.49 mm.
What is the weight of 3 inch Sch 40 pipe?
11.29 kg/m (7.59 lb/ft) in carbon steel; 67.7 kg per 6 m length.
What pressure can 3 inch Sch 40 pipe take?
Roughly 156 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