# 12 inch Sch 10S pipe dimensions & weight

> 12" Sch 10S pipe (DN 300): OD 323.9 mm, wall 4.57 mm, ID 314.76 mm, weight 35.99 kg/m, water capacity and approximate pressure rating.

Source: https://pipingsupplyjournal.com/12-inch-schedule-10s-pipe.html  
Publisher: Piping Supply Journal (Piping Supply Journal Editorial Team) · Published 2026-11-03 · Updated 2026-11-04

12 inch Sch 10S pipe (DN 300) — dimensions, weight and capacity per ASME B36.19M.

Nominal size| 12" (DN 300)  
---|---  
Schedule| Sch 10S  
Outside diameter| 323.9 mm (12.752 in)  
Wall thickness| 4.57 mm (0.180 in)  
Inside diameter| 314.76 mm (12.392 in)  
Weight — carbon steel| 35.99 kg/m · 24.19 lb/ft  
Weight — SS 304 / SS 316| 36.36 / 36.59 kg/m  
6 m length (CS)| 215.9 kg  
20 ft length (CS)| 219.4 kg  
Flow area| 778.12 cm²  
Water capacity| 77.812 L/m  
Outer surface (painting)| 1.0176 m²/m  
Approx. max. working pressure*| 29 bar (416 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 12": [Sch 40](https://pipingsupplyjournal.com/12-inch-schedule-40-pipe.html) · [Sch 80](https://pipingsupplyjournal.com/12-inch-schedule-80-pipe.html) · [Sch 160](https://pipingsupplyjournal.com/12-inch-schedule-160-pipe.html) · [XXS](https://pipingsupplyjournal.com/12-inch-xxs-pipe.html) · [all 12" schedules](https://pipingsupplyjournal.com/12-inch-pipe-dimensions.html)

## Frequently asked questions

What is the ID of 12 inch Sch 10S pipe?

314.76 mm (12.392 in), with OD 323.9 mm and wall 4.57 mm.

What is the weight of 12 inch Sch 10S pipe?

35.99 kg/m (24.19 lb/ft) in carbon steel; 215.9 kg per 6 m length.

What pressure can 12 inch Sch 10S pipe take?

Roughly 29 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