1 inch XXS pipe dimensions & weight
1 inch XXS pipe (DN 25) — dimensions, weight and capacity per ASME B36.19M.
| Nominal size | 1" (DN 25) |
| Schedule | XXS |
| Outside diameter | 33.4 mm (1.315 in) |
| Wall thickness | 9.09 mm (0.358 in) |
| Inside diameter | 15.22 mm (0.599 in) |
| Weight — carbon steel | 5.45 kg/m · 3.66 lb/ft |
| Weight — SS 304 / SS 316 | 5.51 / 5.54 kg/m |
| 6 m length (CS) | 32.7 kg |
| 20 ft length (CS) | 33.2 kg |
| Flow area | 1.82 cm² |
| Water capacity | 0.182 L/m |
| Outer surface (painting) | 0.1049 m²/m |
| Approx. max. working pressure* | 677 bar (9,813 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": Sch 10S · Sch 40 · Sch 80 · Sch 160 · all 1" schedules
Frequently asked questions
What is the ID of 1 inch XXS pipe?
15.22 mm (0.599 in), with OD 33.4 mm and wall 9.09 mm.
What is the weight of 1 inch XXS pipe?
5.45 kg/m (3.66 lb/ft) in carbon steel; 32.7 kg per 6 m length.
What pressure can 1 inch XXS pipe take?
Roughly 677 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