# 12 inch Sch 160 pipe dimensions & weight

> 12" Sch 160 pipe (DN 300): OD 323.9 mm, wall 33.32 mm, ID 257.26 mm, weight 238.76 kg/m, water capacity and approximate pressure rating.

Source: https://pipingsupplyjournal.com/12-inch-schedule-160-pipe.html  
Publisher: Piping Supply Journal (Piping Supply Journal Editorial Team) · Published 2026-11-03 · Updated 2026-11-04

12 inch Sch 160 pipe (DN 300) — dimensions, weight and capacity per ASME B36.10M.

Nominal size| 12" (DN 300)  
---|---  
Schedule| Sch 160  
Outside diameter| 323.9 mm (12.752 in)  
Wall thickness| 33.32 mm (1.312 in)  
Inside diameter| 257.26 mm (10.128 in)  
Weight — carbon steel| 238.76 kg/m · 160.45 lb/ft  
Weight — SS 304 / SS 316| 241.19 / 242.71 kg/m  
6 m length (CS)| 1432.6 kg  
20 ft length (CS)| 1455.5 kg  
Flow area| 519.80 cm²  
Water capacity| 51.980 L/m  
Outer surface (painting)| 1.0176 m²/m  
Approx. max. working pressure*| 268 bar (3,880 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 12": [Sch 10S](https://pipingsupplyjournal.com/12-inch-schedule-10s-pipe.html) · [Sch 40](https://pipingsupplyjournal.com/12-inch-schedule-40-pipe.html) · [Sch 80](https://pipingsupplyjournal.com/12-inch-schedule-80-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 160 pipe?

257.26 mm (10.128 in), with OD 323.9 mm and wall 33.32 mm.

What is the weight of 12 inch Sch 160 pipe?

238.76 kg/m (160.45 lb/ft) in carbon steel; 1432.6 kg per 6 m length.

What pressure can 12 inch Sch 160 pipe take?

Roughly 268 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