1/8 inch Sch 40 pipe dimensions & weight
1/8 inch Sch 40 pipe (DN 6) — dimensions, weight and capacity per ASME B36.10M.
| Nominal size | 1/8" (DN 6) |
| Schedule | Sch 40 |
| Outside diameter | 10.3 mm (0.406 in) |
| Wall thickness | 1.73 mm (0.068 in) |
| Inside diameter | 6.84 mm (0.269 in) |
| Weight — carbon steel | 0.37 kg/m · 0.25 lb/ft |
| Weight — SS 304 / SS 316 | 0.37 / 0.38 kg/m |
| 6 m length (CS) | 2.2 kg |
| 20 ft length (CS) | 2.3 kg |
| Flow area | 0.37 cm² |
| Water capacity | 0.037 L/m |
| Outer surface (painting) | 0.0324 m²/m |
| Approx. max. working pressure* | 459 bar (6,662 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 1/8": Sch 10S · Sch 80 · all 1/8" schedules
Frequently asked questions
What is the ID of 1/8 inch Sch 40 pipe?
6.84 mm (0.269 in), with OD 10.3 mm and wall 1.73 mm.
What is the weight of 1/8 inch Sch 40 pipe?
0.37 kg/m (0.25 lb/ft) in carbon steel; 2.2 kg per 6 m length.
What pressure can 1/8 inch Sch 40 pipe take?
Roughly 459 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