3/4 inch Sch 80 pipe dimensions & weight
3/4 inch Sch 80 pipe (DN 20) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 3/4" (DN 20) |
| Schedule | Sch 80 |
| Outside diameter | 26.7 mm (1.051 in) |
| Wall thickness | 3.91 mm (0.154 in) |
| Inside diameter | 18.88 mm (0.743 in) |
| Weight — carbon steel | 2.20 kg/m · 1.48 lb/ft |
| Weight — SS 304 / SS 316 | 2.22 / 2.24 kg/m |
| 6 m length (CS) | 13.2 kg |
| 20 ft length (CS) | 13.4 kg |
| Flow area | 2.80 cm² |
| Water capacity | 0.280 L/m |
| Outer surface (painting) | 0.0839 m²/m |
| Approx. max. working pressure* | 394 bar (5,711 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 for your own design conditions.
Other schedules for 3/4": Sch 10S · Sch 40 · Sch 160 · XXS · all 3/4" schedules
Frequently asked questions
What is the ID of 3/4 inch Sch 80 pipe?
18.88 mm (0.743 in), with OD 26.7 mm and wall 3.91 mm.
What is the weight of 3/4 inch Sch 80 pipe?
2.20 kg/m (1.48 lb/ft) in carbon steel; 13.2 kg per 6 m length.
What pressure can 3/4 inch Sch 80 pipe take?
Roughly 394 bar at ambient for seamless A106 Gr B under ASME B31.3 with no corrosion allowance; actual rating depends on material, temperature and code.
By Piping Supply Journal Editorial Team · Published · Last updated