1/8 inch pipe (DN 6): outside diameter, wall thickness and weight by schedule
A 1/8 inch pipe (DN 6) has a 10.3 mm (0.405 in) outside diameter in every schedule: what changes is the wall, and with it the inside diameter and the weight. Designations that give the same wall share a row.
| Schedule | Wall | ID | Weight |
|---|---|---|---|
| Sch 10 / 10S | 1.24 mm (0.049 in) | 7.82 mm (0.307 in) | 0.28 kg/m (0.19 lb/ft) |
| Sch 30 | 1.45 mm (0.057 in) | 7.40 mm (0.291 in) | 0.32 kg/m (0.21 lb/ft) |
| Sch 40 / STD / 40S | 1.73 mm (0.068 in) | 6.84 mm (0.269 in) | 0.37 kg/m (0.24 lb/ft) |
| Sch 80 / XS / 80S | 2.41 mm (0.095 in) | 5.48 mm (0.215 in) | 0.47 kg/m (0.31 lb/ft) |
| Sch 160 | 3.15 mm (0.124 in) | 4.00 mm (0.157 in) | 0.56 kg/m (0.37 lb/ft) |
| XXS | 4.83 mm (0.190 in) | 0.64 mm (0.025 in) | 0.65 kg/m (0.44 lb/ft) |
Plain-end weight of carbon steel pipe, by the standard's own formula: 10.69 × (D − t) × t in lb/ft, with D and t in inches (0.0246615 × (D − t) × t in kg/m, in mm). Austenitic stainless weighs about 2% more.
Lay out on 1/8 inch pipe
The outside diameter and the wall of the chosen schedule go to the calculator, which opens with them filled in and draws without an account.
Questions
- What is the outside diameter of 1/8 inch pipe?
- 10.3 mm (0.405 in), in any schedule: it is the DN 6 pipe of ASME B36.10M. The wall changes with the schedule, and the inside diameter with it.
- What is the wall thickness of 1/8 inch schedule 40 pipe?
- 1.73 mm (0.068 in), with an inside diameter of 6.84 mm (0.269 in); carbon steel pipe weighs 0.37 kg/m (0.24 lb/ft).
- What is the difference between schedule 40 and 80 in 1/8 inch pipe?
- The wall: 1.73 mm (0.068 in) in schedule 40 and 2.41 mm (0.095 in) in 80. The outside diameter is the same, so schedule 80 has the smaller bore -- 5.48 mm (0.215 in) against 6.84 mm (0.269 in) -- and weighs 0.47 kg/m (0.31 lb/ft) against 0.37 kg/m (0.24 lb/ft).