# 1 inch Sch 10S pipe dimensions & weight

> 1" Sch 10S pipe (DN 25): OD 33.4 mm, wall 2.77 mm, ID 27.86 mm, weight 2.09 kg/m, water capacity and approximate pressure rating.

Source: https://pipingsupplyjournal.com/1-inch-schedule-10s-pipe.html  
Publisher: Piping Supply Journal (Piping Supply Journal Editorial Team) · Published 2026-11-03 · Updated 2026-11-04

1 inch Sch 10S pipe (DN 25) — dimensions, weight and capacity per ASME B36.19M.

Nominal size| 1" (DN 25)  
---|---  
Schedule| Sch 10S  
Outside diameter| 33.4 mm (1.315 in)  
Wall thickness| 2.77 mm (0.109 in)  
Inside diameter| 27.86 mm (1.097 in)  
Weight — carbon steel| 2.09 kg/m · 1.40 lb/ft  
Weight — SS 304 / SS 316| 2.11 / 2.12 kg/m  
6 m length (CS)| 12.5 kg  
20 ft length (CS)| 12.7 kg  
Flow area| 6.10 cm²  
Water capacity| 0.610 L/m  
Outer surface (painting)| 0.1049 m²/m  
Approx. max. working pressure*| 177 bar (2,570 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](https://pipingsupplyjournal.com/pipe-wall-thickness-calculator.html) for your own design conditions.

Other schedules for 1": [Sch 40](https://pipingsupplyjournal.com/1-inch-schedule-40-pipe.html) · [Sch 80](https://pipingsupplyjournal.com/1-inch-schedule-80-pipe.html) · [Sch 160](https://pipingsupplyjournal.com/1-inch-schedule-160-pipe.html) · [XXS](https://pipingsupplyjournal.com/1-inch-xxs-pipe.html) · [all 1" schedules](https://pipingsupplyjournal.com/1-inch-pipe-dimensions.html)

## Frequently asked questions

What is the ID of 1 inch Sch 10S pipe?

27.86 mm (1.097 in), with OD 33.4 mm and wall 2.77 mm.

What is the weight of 1 inch Sch 10S pipe?

2.09 kg/m (1.40 lb/ft) in carbon steel; 12.5 kg per 6 m length.

What pressure can 1 inch Sch 10S pipe take?

Roughly 177 bar at ambient for seamless A312 TP316L 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