NPS 34 Pipe Dimensions
Outside diameter 34.000 in (863.6 mm) — fixed across every schedule. 6 wall thicknesses from ASME B36.10M, with bore, plain-end weight and flow area for each.
- Nominal size
- NPS 34
- Metric designator
- DN 850
- Outside diameter
- 34.000 in (863.6 mm)
- Schedules listed
- 6
- Standard weight wall
- 0.375 in (9.5 mm)
- Extra strong wall
- 0.500 in (12.7 mm)
Every schedule in NPS 34
Dimensions are given in inches, with the millimetre equivalent beneath in grey.
| Schedule | Wall thickness | Inside diameter | Weight, empty | Flow area (in²) | Water (US gal/ft) |
|---|---|---|---|---|---|
| Sch 10 | 0.3127.92 mm | 33.376847.75 mm | 112.26167.05 kg/m | 874.90 | 45.449 |
| Sch 20 | 0.50012.70 mm | 33.000838.20 mm | 178.89266.22 kg/m | 855.30 | 44.431 |
| Sch 30 | 0.62515.88 mm | 32.750831.85 mm | 222.78331.54 kg/m | 842.39 | 43.760 |
| Sch 40 | 0.68817.48 mm | 32.624828.65 mm | 244.78364.27 kg/m | 835.92 | 43.424 |
| STD | 0.3759.52 mm | 33.250844.55 mm | 134.67200.41 kg/m | 868.31 | 45.107 |
| XS | 0.50012.70 mm | 33.000838.20 mm | 178.89266.22 kg/m | 855.30 | 44.431 |
Weight is calculated for carbon steel as w = 10.6802 × t × (OD − t) lb/ft and is the plain-end weight, excluding coatings, linings and fittings.
Standard weight does not coincide with any numbered schedule in this size. Extra strong equals Schedule 20.
This size, schedule by schedule
A page for each combination, with bore, weight, water capacity and the matching flange and fitting data.
This size in a schedule chart
Common questions
What is the outside diameter of NPS 34 pipe?
NPS 34 pipe has an outside diameter of 34.000 in (863.6 mm). That outside diameter is fixed: it is identical in every schedule, and only the wall thickness — and therefore the bore — changes from one schedule to the next.
How much does NPS 34 schedule 40 pipe weigh?
244.78 lb/ft (364.27 kg/m) as plain-end carbon steel, on a wall thickness of 0.688 in (17.5 mm).
What is the metric equivalent of NPS 34?
DN 850. DN is a dimensionless designator, not a measurement — DN 850 pipe does not measure 850 mm anywhere. Its actual outside diameter is 863.6 mm.