2-1/2 inch XXS pipe dimensions & weight
2-1/2 inch XXS pipe (DN 65) — dimensions, weight and capacity per ASME B36.19M.
| Nominal size | 2-1/2" (DN 65) |
| Schedule | XXS |
| Outside diameter | 73.0 mm (2.874 in) |
| Wall thickness | 14.02 mm (0.552 in) |
| Inside diameter | 44.96 mm (1.770 in) |
| Weight — carbon steel | 20.39 kg/m · 13.70 lb/ft |
| Weight — SS 304 / SS 316 | 20.60 / 20.73 kg/m |
| 6 m length (CS) | 122.3 kg |
| 20 ft length (CS) | 124.3 kg |
| Flow area | 15.88 cm² |
| Water capacity | 1.588 L/m |
| Outer surface (painting) | 0.2293 m²/m |
| Approx. max. working pressure* | 447 bar (6,477 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 2-1/2": Sch 10S · Sch 40 · Sch 80 · Sch 160 · all 2-1/2" schedules
Frequently asked questions
What is the ID of 2-1/2 inch XXS pipe?
44.96 mm (1.770 in), with OD 73.0 mm and wall 14.02 mm.
What is the weight of 2-1/2 inch XXS pipe?
20.39 kg/m (13.70 lb/ft) in carbon steel; 122.3 kg per 6 m length.
What pressure can 2-1/2 inch XXS pipe take?
Roughly 447 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