NPS 2 Pipe Dimensions
Outside diameter 2.375 in (60.3 mm) — fixed across every schedule. 8 wall thicknesses from ASME B36.10M, with bore, plain-end weight and flow area for each.
- Nominal size
- NPS 2
- Metric designator
- DN 50
- Outside diameter
- 2.375 in (60.3 mm)
- Schedules listed
- 8
- Standard weight wall
- 0.154 in (3.9 mm)
- Extra strong wall
- 0.218 in (5.5 mm)
Every schedule in NPS 2
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 5 | 0.0651.65 mm | 2.24557.02 mm | 1.602.39 kg/m | 3.96 | 0.206 |
| Sch 10 | 0.1092.77 mm | 2.15754.79 mm | 2.643.93 kg/m | 3.65 | 0.190 |
| Sch 40 | 0.1543.91 mm | 2.06752.50 mm | 3.655.44 kg/m | 3.36 | 0.174 |
| STD | 0.1543.91 mm | 2.06752.50 mm | 3.655.44 kg/m | 3.36 | 0.174 |
| Sch 80 | 0.2185.54 mm | 1.93949.25 mm | 5.027.47 kg/m | 2.95 | 0.153 |
| XS | 0.2185.54 mm | 1.93949.25 mm | 5.027.47 kg/m | 2.95 | 0.153 |
| Sch 160 | 0.3448.74 mm | 1.68742.85 mm | 7.4611.10 kg/m | 2.24 | 0.116 |
| XXS | 0.43611.07 mm | 1.50338.18 mm | 9.0313.44 kg/m | 1.77 | 0.092 |
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 2 pipe?
NPS 2 pipe has an outside diameter of 2.375 in (60.3 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 2 schedule 40 pipe weigh?
3.65 lb/ft (5.44 kg/m) as plain-end carbon steel, on a wall thickness of 0.154 in (3.9 mm).
What is the metric equivalent of NPS 2?
DN 50. DN is a dimensionless designator, not a measurement — DN 50 pipe does not measure 50 mm anywhere. Its actual outside diameter is 60.3 mm.