1-1/4 inch Sch 10S pipe dimensions & weight
1-1/4 inch Sch 10S pipe (DN 32) — dimensions, weight and capacity per ASME B36.19M.
| Nominal size | 1-1/4" (DN 32) |
| Schedule | Sch 10S |
| Outside diameter | 42.2 mm (1.661 in) |
| Wall thickness | 2.77 mm (0.109 in) |
| Inside diameter | 36.66 mm (1.443 in) |
| Weight — carbon steel | 2.69 kg/m · 1.81 lb/ft |
| Weight — SS 304 / SS 316 | 2.72 / 2.73 kg/m |
| 6 m length (CS) | 16.1 kg |
| 20 ft length (CS) | 16.4 kg |
| Flow area | 10.56 cm² |
| Water capacity | 1.056 L/m |
| Outer surface (painting) | 0.1326 m²/m |
| Approx. max. working pressure* | 138 bar (2,008 psi) — A312 TP316L |
*Approximate ASME B31.3 straight-pipe rating at ≤ 38 °C for seamless A312 TP316L (S = 115.0 MPa, E = 1, 12.5% mill tolerance, no corrosion allowance). Use the wall thickness calculator for your own design conditions.
Other schedules for 1-1/4": Sch 40 · Sch 80 · Sch 160 · XXS · all 1-1/4" schedules
Frequently asked questions
What is the ID of 1-1/4 inch Sch 10S pipe?
36.66 mm (1.443 in), with OD 42.2 mm and wall 2.77 mm.
What is the weight of 1-1/4 inch Sch 10S pipe?
2.69 kg/m (1.81 lb/ft) in carbon steel; 16.1 kg per 6 m length.
What pressure can 1-1/4 inch Sch 10S pipe take?
Roughly 138 bar at ambient for seamless A312 TP316L under ASME B31.3 with no corrosion allowance; actual rating depends on material, temperature and code.
Last updated 2026-11-02