3/8 inch Sch 40 pipe dimensions & weight
3/8 inch Sch 40 pipe (DN 10) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 3/8" (DN 10) |
| Schedule | Sch 40 |
| Outside diameter | 17.1 mm (0.673 in) |
| Wall thickness | 2.31 mm (0.091 in) |
| Inside diameter | 12.48 mm (0.491 in) |
| Weight — carbon steel | 0.84 kg/m · 0.56 lb/ft |
| Weight — SS 304 / SS 316 | 0.85 / 0.85 kg/m |
| 6 m length (CS) | 5.0 kg |
| 20 ft length (CS) | 5.1 kg |
| Flow area | 1.22 cm² |
| Water capacity | 0.122 L/m |
| Outer surface (painting) | 0.0537 m²/m |
| Approx. max. working pressure* | 360 bar (5,222 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 3/8": Sch 10S · Sch 80 · all 3/8" schedules
Frequently asked questions
What is the ID of 3/8 inch Sch 40 pipe?
12.48 mm (0.491 in), with OD 17.1 mm and wall 2.31 mm.
What is the weight of 3/8 inch Sch 40 pipe?
0.84 kg/m (0.56 lb/ft) in carbon steel; 5.0 kg per 6 m length.
What pressure can 3/8 inch Sch 40 pipe take?
Roughly 360 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