NPS 7 Pipe Dimensions
Outside diameter 7.625 in (193.7 mm) — fixed across every schedule. 5 wall thicknesses from ASME B36.10M, with bore, plain-end weight and flow area for each.
- Nominal size
- NPS 7
- Metric designator
- DN 175
- Outside diameter
- 7.625 in (193.7 mm)
- Schedules listed
- 5
- Standard weight wall
- 0.301 in (7.6 mm)
- Extra strong wall
- 0.500 in (12.7 mm)
Every schedule in NPS 7
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 40 | 0.3017.65 mm | 7.023178.38 mm | 23.5435.04 kg/m | 38.74 | 2.012 |
| STD | 0.3017.65 mm | 7.023178.38 mm | 23.5435.04 kg/m | 38.74 | 2.012 |
| Sch 80 | 0.50012.70 mm | 6.625168.27 mm | 38.0556.62 kg/m | 34.47 | 1.791 |
| XS | 0.50012.70 mm | 6.625168.27 mm | 38.0556.62 kg/m | 34.47 | 1.791 |
| XXS | 0.87522.22 mm | 5.875149.22 mm | 63.0893.87 kg/m | 27.11 | 1.408 |
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 equals Schedule 40 in this size. Extra strong equals Schedule 80.
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 7 pipe?
NPS 7 pipe has an outside diameter of 7.625 in (193.7 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 7 schedule 40 pipe weigh?
23.54 lb/ft (35.04 kg/m) as plain-end carbon steel, on a wall thickness of 0.301 in (7.6 mm).
What is the metric equivalent of NPS 7?
DN 175. DN is a dimensionless designator, not a measurement — DN 175 pipe does not measure 175 mm anywhere. Its actual outside diameter is 193.7 mm.