NPS 34 Standard (STD) Pipe
34.000 in (863.6 mm) outside diameter on a 0.375 in (9.5 mm) wall, giving a 33.250 in (844.5 mm) bore and 134.67 lb/ft (200.41 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 34 (DN 850)
- Schedule
- Standard (STD)
- Outside diameter
- 34.000 in (863.6 mm)
- Wall thickness
- 0.375 in (9.5 mm)
- Inside diameter
- 33.250 in (844.5 mm)
- Weight, empty
- 134.67 lb/ft (200.41 kg/m)
- Weight, water filled
- 511.11 lb/ft (760.61 kg/m)
- Flow area
- 868.307 in² (560197 mm²)
No other designation in NPS 34 shares this wall thickness, so Standard (STD) is unambiguous in this size.
Every schedule in NPS 34
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 | 33.376847.75 mm | 112.26167.05 kg/m | 45.449 |
| Sch 20 | 0.50012.70 mm | 33.000838.20 mm | 178.89266.22 kg/m | 44.431 |
| Sch 30 | 0.62515.88 mm | 32.750831.85 mm | 222.78331.54 kg/m | 43.760 |
| Sch 40 | 0.68817.48 mm | 32.624828.65 mm | 244.78364.27 kg/m | 43.424 |
| STD this page | 0.3759.52 mm | 33.250844.55 mm | 134.67200.41 kg/m | 45.107 |
| XS | 0.50012.70 mm | 33.000838.20 mm | 178.89266.22 kg/m | 44.431 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Common questions
What is the inside diameter of NPS 34 standard (std) pipe?
33.250 in (844.5 mm). The outside diameter is fixed at 34.000 in (863.6 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 34 standard (std) pipe weigh?
134.67 lb/ft (200.41 kg/m) empty, as plain-end carbon steel. Full of water it comes to 511.11 lb/ft (760.61 kg/m), because the bore holds 45.107 US gallons per foot. One short ton of this pipe is about 15 ft.
Does NPS 34 standard (std) pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 34 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 33.250 in (844.5 mm) to match.