NPS 1/8 Schedule 5 Pipe
0.405 in (10.3 mm) outside diameter on a 0.035 in (0.9 mm) wall, giving a 0.335 in (8.5 mm) bore and 0.14 lb/ft (0.21 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 1/8 (DN 6)
- Schedule
- Schedule 5
- Outside diameter
- 0.405 in (10.3 mm)
- Wall thickness
- 0.035 in (0.9 mm)
- Inside diameter
- 0.335 in (8.5 mm)
- Weight, empty
- 0.14 lb/ft (0.21 kg/m)
- Weight, water filled
- 0.18 lb/ft (0.26 kg/m)
- Flow area
- 0.088 in² (57 mm²)
No other designation in NPS 1/8 shares this wall thickness, so Schedule 5 is unambiguous in this size.
Every schedule in NPS 1/8
Dimensions are given in inches, with the millimetre equivalent beneath in grey.
| Schedule | Wall thickness | Inside diameter | Weight, empty | Water (US gal/ft) |
|---|---|---|---|---|
| Sch 5 this page | 0.0350.89 mm | 0.3358.51 mm | 0.140.21 kg/m | 0.005 |
| Sch 10 | 0.0491.24 mm | 0.3077.80 mm | 0.190.28 kg/m | 0.004 |
| Sch 40 | 0.0681.73 mm | 0.2696.83 mm | 0.240.36 kg/m | 0.003 |
| STD | 0.0681.73 mm | 0.2696.83 mm | 0.240.36 kg/m | 0.003 |
| Sch 80 | 0.0952.41 mm | 0.2155.46 mm | 0.310.47 kg/m | 0.002 |
| XS | 0.0952.41 mm | 0.2155.46 mm | 0.310.47 kg/m | 0.002 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Common questions
What is the inside diameter of NPS 1/8 schedule 5 pipe?
0.335 in (8.5 mm). The outside diameter is fixed at 0.405 in (10.3 mm) by ASME B36.10M, and the 0.035 in (0.9 mm) wall takes 0.070 in off it — 0.035 in from each side — leaving that bore.
How much does NPS 1/8 schedule 5 pipe weigh?
0.14 lb/ft (0.21 kg/m) empty, as plain-end carbon steel. Full of water it comes to 0.18 lb/ft (0.26 kg/m), because the bore holds 0.005 US gallons per foot. One short ton of this pipe is about 14460 ft.
Does NPS 1/8 schedule 5 pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 1/8 hardware fits this pipe in any schedule. The one thing that does follow the schedule is the bore of a weld neck flange or a fitting end prep, which has to be 0.335 in (8.5 mm) to match.