1/2 inch XXS pipe dimensions & weight
1/2 inch XXS pipe (DN 15) — dimensions, weight and capacity per ASME B36.19M.
| Nominal size | 1/2" (DN 15) |
| Schedule | XXS |
| Outside diameter | 21.3 mm (0.839 in) |
| Wall thickness | 7.47 mm (0.294 in) |
| Inside diameter | 6.36 mm (0.250 in) |
| Weight — carbon steel | 2.55 kg/m · 1.71 lb/ft |
| Weight — SS 304 / SS 316 | 2.58 / 2.59 kg/m |
| 6 m length (CS) | 15.3 kg |
| 20 ft length (CS) | 15.5 kg |
| Flow area | 0.32 cm² |
| Water capacity | 0.032 L/m |
| Outer surface (painting) | 0.0669 m²/m |
| Approx. max. working pressure* | 935 bar (13,567 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 1/2": Sch 10S · Sch 40 · Sch 80 · Sch 160 · all 1/2" schedules
Frequently asked questions
What is the ID of 1/2 inch XXS pipe?
6.36 mm (0.250 in), with OD 21.3 mm and wall 7.47 mm.
What is the weight of 1/2 inch XXS pipe?
2.55 kg/m (1.71 lb/ft) in carbon steel; 15.3 kg per 6 m length.
What pressure can 1/2 inch XXS pipe take?
Roughly 935 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