# 1/2 inch Sch 80 pipe dimensions & weight

> 1/2" Sch 80 pipe (DN 15): OD 21.3 mm, wall 3.73 mm, ID 13.84 mm, weight 1.62 kg/m, water capacity and approximate pressure rating.

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

1/2 inch Sch 80 pipe (DN 15) — dimensions, weight and capacity per ASME B36.10M.

Nominal size| 1/2" (DN 15)  
---|---  
Schedule| Sch 80  
Outside diameter| 21.3 mm (0.839 in)  
Wall thickness| 3.73 mm (0.147 in)  
Inside diameter| 13.84 mm (0.545 in)  
Weight — carbon steel| 1.62 kg/m · 1.09 lb/ft  
Weight — SS 304 / SS 316| 1.64 / 1.65 kg/m  
6 m length (CS)| 9.7 kg  
20 ft length (CS)| 9.9 kg  
Flow area| 1.50 cm²  
Water capacity| 0.150 L/m  
Outer surface (painting)| 0.0669 m²/m  
Approx. max. working pressure*| 482 bar (6,986 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 1/2": [Sch 10S](https://pipingsupplyjournal.com/1-2-inch-schedule-10s-pipe.html) · [Sch 40](https://pipingsupplyjournal.com/1-2-inch-schedule-40-pipe.html) · [Sch 160](https://pipingsupplyjournal.com/1-2-inch-schedule-160-pipe.html) · [XXS](https://pipingsupplyjournal.com/1-2-inch-xxs-pipe.html) · [all 1/2" schedules](https://pipingsupplyjournal.com/1-2-inch-pipe-dimensions.html)

## Frequently asked questions

What is the ID of 1/2 inch Sch 80 pipe?

13.84 mm (0.545 in), with OD 21.3 mm and wall 3.73 mm.

What is the weight of 1/2 inch Sch 80 pipe?

1.62 kg/m (1.09 lb/ft) in carbon steel; 9.7 kg per 6 m length.

What pressure can 1/2 inch Sch 80 pipe take?

Roughly 482 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