1-1/2 inch Sch 40 pipe dimensions & weight
1-1/2 inch Sch 40 pipe (DN 40) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 1-1/2" (DN 40) |
| Schedule | Sch 40 |
| Outside diameter | 48.3 mm (1.902 in) |
| Wall thickness | 3.68 mm (0.145 in) |
| Inside diameter | 40.94 mm (1.612 in) |
| Weight — carbon steel | 4.05 kg/m · 2.72 lb/ft |
| Weight — SS 304 / SS 316 | 4.09 / 4.12 kg/m |
| 6 m length (CS) | 24.3 kg |
| 20 ft length (CS) | 24.7 kg |
| Flow area | 13.16 cm² |
| Water capacity | 1.316 L/m |
| Outer surface (painting) | 0.1517 m²/m |
| Approx. max. working pressure* | 194 bar (2,817 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 1-1/2": Sch 10S · Sch 80 · Sch 160 · XXS · all 1-1/2" schedules
Frequently asked questions
What is the ID of 1-1/2 inch Sch 40 pipe?
40.94 mm (1.612 in), with OD 48.3 mm and wall 3.68 mm.
What is the weight of 1-1/2 inch Sch 40 pipe?
4.05 kg/m (2.72 lb/ft) in carbon steel; 24.3 kg per 6 m length.
What pressure can 1-1/2 inch Sch 40 pipe take?
Roughly 194 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