2-1/2 inch Sch 80 pipe dimensions & weight
2-1/2 inch Sch 80 pipe (DN 65) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 2-1/2" (DN 65) |
| Schedule | Sch 80 |
| Outside diameter | 73.0 mm (2.874 in) |
| Wall thickness | 7.01 mm (0.276 in) |
| Inside diameter | 58.98 mm (2.322 in) |
| Weight — carbon steel | 11.41 kg/m · 7.67 lb/ft |
| Weight — SS 304 / SS 316 | 11.53 / 11.60 kg/m |
| 6 m length (CS) | 68.5 kg |
| 20 ft length (CS) | 69.6 kg |
| Flow area | 27.32 cm² |
| Water capacity | 2.732 L/m |
| Outer surface (painting) | 0.2293 m²/m |
| Approx. max. working pressure* | 248 bar (3,603 psi) — A106 Gr B |
*Approximate ASME B31.3 straight-pipe rating at ≤ 38 °C for seamless A106 Gr B (S = 137.9 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 160 · XXS · all 2-1/2" schedules
Frequently asked questions
What is the ID of 2-1/2 inch Sch 80 pipe?
58.98 mm (2.322 in), with OD 73.0 mm and wall 7.01 mm.
What is the weight of 2-1/2 inch Sch 80 pipe?
11.41 kg/m (7.67 lb/ft) in carbon steel; 68.5 kg per 6 m length.
What pressure can 2-1/2 inch Sch 80 pipe take?
Roughly 248 bar at ambient for seamless A106 Gr B under ASME B31.3 with no corrosion allowance; actual rating depends on material, temperature and code.
By Piping Supply Journal Editorial Team · Published · Last updated