1-1/4 inch XXS pipe dimensions & weight
1-1/4 inch XXS pipe (DN 32) — dimensions, weight and capacity per ASME B36.19M.
| Nominal size | 1-1/4" (DN 32) |
| Schedule | XXS |
| Outside diameter | 42.2 mm (1.661 in) |
| Wall thickness | 9.70 mm (0.382 in) |
| Inside diameter | 22.80 mm (0.898 in) |
| Weight — carbon steel | 7.77 kg/m · 5.22 lb/ft |
| Weight — SS 304 / SS 316 | 7.85 / 7.90 kg/m |
| 6 m length (CS) | 46.6 kg |
| 20 ft length (CS) | 47.4 kg |
| Flow area | 4.08 cm² |
| Water capacity | 0.408 L/m |
| Outer surface (painting) | 0.1326 m²/m |
| Approx. max. working pressure* | 551 bar (7,996 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 10S · Sch 40 · Sch 80 · Sch 160 · all 1-1/4" schedules
Frequently asked questions
What is the ID of 1-1/4 inch XXS pipe?
22.80 mm (0.898 in), with OD 42.2 mm and wall 9.70 mm.
What is the weight of 1-1/4 inch XXS pipe?
7.77 kg/m (5.22 lb/ft) in carbon steel; 46.6 kg per 6 m length.
What pressure can 1-1/4 inch XXS pipe take?
Roughly 551 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