# 2-1/2 inch Sch 80 pipe dimensions & weight

> 2-1/2" Sch 80 pipe (DN 65): OD 73.0 mm, wall 7.01 mm, ID 58.98 mm, weight 11.41 kg/m, water capacity and approximate pressure rating.

Source: https://pipingsupplyjournal.com/2-1-2-inch-schedule-80-pipe.html  
Publisher: Piping Supply Journal (Piping Supply Journal Editorial Team) · Published 2026-11-03 · Updated 2026-11-04

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](https://pipingsupplyjournal.com/pipe-wall-thickness-calculator.html) for your own design conditions.

Other schedules for 2-1/2": [Sch 10S](https://pipingsupplyjournal.com/2-1-2-inch-schedule-10s-pipe.html) · [Sch 40](https://pipingsupplyjournal.com/2-1-2-inch-schedule-40-pipe.html) · [Sch 160](https://pipingsupplyjournal.com/2-1-2-inch-schedule-160-pipe.html) · [XXS](https://pipingsupplyjournal.com/2-1-2-inch-xxs-pipe.html) · [all 2-1/2" schedules](https://pipingsupplyjournal.com/2-1-2-inch-pipe-dimensions.html)

## 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.

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Data is for reference; verify against the current edition of the governing standard. Quotations: https://pipingsupplyjournal.com/get-quote.html