1 inch Sch 80 pipe dimensions & weight
1 inch Sch 80 pipe (DN 25) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 1" (DN 25) |
| Schedule | Sch 80 |
| Outside diameter | 33.4 mm (1.315 in) |
| Wall thickness | 4.55 mm (0.179 in) |
| Inside diameter | 24.30 mm (0.957 in) |
| Weight — carbon steel | 3.24 kg/m · 2.18 lb/ft |
| Weight — SS 304 / SS 316 | 3.27 / 3.29 kg/m |
| 6 m length (CS) | 19.4 kg |
| 20 ft length (CS) | 19.8 kg |
| Flow area | 4.64 cm² |
| Water capacity | 0.464 L/m |
| Outer surface (painting) | 0.1049 m²/m |
| Approx. max. working pressure* | 363 bar (5,271 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 1": Sch 10S · Sch 40 · Sch 160 · XXS · all 1" schedules
Frequently asked questions
What is the ID of 1 inch Sch 80 pipe?
24.30 mm (0.957 in), with OD 33.4 mm and wall 4.55 mm.
What is the weight of 1 inch Sch 80 pipe?
3.24 kg/m (2.18 lb/ft) in carbon steel; 19.4 kg per 6 m length.
What pressure can 1 inch Sch 80 pipe take?
Roughly 363 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