NPS 26 Standard (STD) Pipe
26.000 in (660.4 mm) outside diameter on a 0.375 in (9.5 mm) wall, giving a 25.250 in (641.3 mm) bore and 102.63 lb/ft (152.73 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 26 (DN 650)
- Schedule
- Standard (STD)
- Outside diameter
- 26.000 in (660.4 mm)
- Wall thickness
- 0.375 in (9.5 mm)
- Inside diameter
- 25.250 in (641.3 mm)
- Weight, empty
- 102.63 lb/ft (152.73 kg/m)
- Weight, water filled
- 319.71 lb/ft (475.79 kg/m)
- Flow area
- 500.740 in² (323058 mm²)
No other designation in NPS 26 shares this wall thickness, so Standard (STD) is unambiguous in this size.
Every schedule in NPS 26
Dimensions are given in inches, with the millimetre equivalent beneath in grey.
| Schedule | Wall thickness | Inside diameter | Weight, empty | Water (US gal/ft) |
|---|---|---|---|---|
| Sch 10 | 0.3127.92 mm | 25.376644.55 mm | 85.60127.38 kg/m | 26.273 |
| Sch 20 | 0.50012.70 mm | 25.000635.00 mm | 136.17202.65 kg/m | 25.500 |
| STD this page | 0.3759.52 mm | 25.250641.35 mm | 102.63152.73 kg/m | 26.012 |
| XS | 0.50012.70 mm | 25.000635.00 mm | 136.17202.65 kg/m | 25.500 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Common questions
What is the inside diameter of NPS 26 standard (std) pipe?
25.250 in (641.3 mm). The outside diameter is fixed at 26.000 in (660.4 mm) by ASME B36.10M, and the 0.375 in (9.5 mm) wall takes 0.750 in off it — 0.375 in from each side — leaving that bore.
How much does NPS 26 standard (std) pipe weigh?
102.63 lb/ft (152.73 kg/m) empty, as plain-end carbon steel. Full of water it comes to 319.71 lb/ft (475.79 kg/m), because the bore holds 26.012 US gallons per foot. One short ton of this pipe is about 19 ft.
Does NPS 26 standard (std) pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 26 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 25.250 in (641.3 mm) to match.