NPS 2 Schedule 5 Pipe
2.375 in (60.3 mm) outside diameter on a 0.065 in (1.7 mm) wall, giving a 2.245 in (57.0 mm) bore and 1.60 lb/ft (2.39 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 2 (DN 50)
- Schedule
- Schedule 5
- Outside diameter
- 2.375 in (60.3 mm)
- Wall thickness
- 0.065 in (1.7 mm)
- Inside diameter
- 2.245 in (57.0 mm)
- Weight, empty
- 1.60 lb/ft (2.39 kg/m)
- Weight, water filled
- 3.32 lb/ft (4.94 kg/m)
- Flow area
- 3.958 in² (2554 mm²)
No other designation in NPS 2 shares this wall thickness, so Schedule 5 is unambiguous in this size.
Every schedule in NPS 2
Dimensions are given in inches, with the millimetre equivalent beneath in grey.
| Schedule | Wall thickness | Inside diameter | Weight, empty | Water (US gal/ft) |
|---|---|---|---|---|
| Sch 5 this page | 0.0651.65 mm | 2.24557.02 mm | 1.602.39 kg/m | 0.206 |
| Sch 10 | 0.1092.77 mm | 2.15754.79 mm | 2.643.93 kg/m | 0.190 |
| Sch 40 | 0.1543.91 mm | 2.06752.50 mm | 3.655.44 kg/m | 0.174 |
| STD | 0.1543.91 mm | 2.06752.50 mm | 3.655.44 kg/m | 0.174 |
| Sch 80 | 0.2185.54 mm | 1.93949.25 mm | 5.027.47 kg/m | 0.153 |
| XS | 0.2185.54 mm | 1.93949.25 mm | 5.027.47 kg/m | 0.153 |
| Sch 160 | 0.3448.74 mm | 1.68742.85 mm | 7.4611.10 kg/m | 0.116 |
| XXS | 0.43611.07 mm | 1.50338.18 mm | 9.0313.44 kg/m | 0.092 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Flanges for NPS 2 pipe
Flange dimensions are set by NPS and pressure class, not by schedule, so every flange below fits this pipe. The exception is the weld neck: its bore is machined to the pipe it is welded to, which for Schedule 5 means 2.245 in (57.0 mm). Order the flange to the schedule or the bores will not line up at the weld.
| Class | Flange OD | Thickness | Bolt circle | Bolting |
|---|---|---|---|---|
| Class 150 | 6.00152.40 mm | 0.7519.05 mm | 4.75120.65 mm | 4 × 5/8 in |
| Class 300 | 6.50165.10 mm | 0.8822.35 mm | 5.00127.00 mm | 8 × 5/8 in |
| Class 400 | 6.50165.10 mm | 1.0025.40 mm | 5.00127.00 mm | 8 × 5/8 in |
| Class 600 | 6.50165.10 mm | 1.0025.40 mm | 5.00127.00 mm | 8 × 5/8 in |
| Class 900 | 8.50215.90 mm | 1.5038.10 mm | 6.50165.10 mm | 8 × 7/8 in |
| Class 1500 | 8.50215.90 mm | 1.5038.10 mm | 6.50165.10 mm | 8 × 7/8 in |
| Class 2500 | 9.25234.95 mm | 2.0050.80 mm | 6.75171.45 mm | 8 × 1 in |
Fittings for NPS 2 pipe
ASME B16.9 dimensions come from NPS alone, so these figures hold for Schedule 5 exactly as they do for every other schedule in the size. Only the wall thickness has to be ordered to match.
| Fitting | Dimension | NPS 2 |
|---|---|---|
| 90° Long Radius Elbow | Centre-to-end A | 3.0076.20 mm |
| 90° Short Radius Elbow | Centre-to-end A | 2.0050.80 mm |
| 45° Long Radius Elbow | Centre-to-end B | 1.3835.05 mm |
| Straight Tee | Centre-to-end C and M | 2.5063.50 mm |
| Reducing Tee | Run centre-to-end C | 2.5063.50 mm |
| Concentric Reducer | End-to-end H | 3.0076.20 mm |
| Eccentric Reducer | End-to-end H | 3.0076.20 mm |
| Cap | Length E | 1.5038.10 mm |
Common questions
What is the inside diameter of NPS 2 schedule 5 pipe?
2.245 in (57.0 mm). The outside diameter is fixed at 2.375 in (60.3 mm) by ASME B36.10M, and the 0.065 in (1.7 mm) wall takes 0.130 in off it — 0.065 in from each side — leaving that bore.
How much does NPS 2 schedule 5 pipe weigh?
1.60 lb/ft (2.39 kg/m) empty, as plain-end carbon steel. Full of water it comes to 3.32 lb/ft (4.94 kg/m), because the bore holds 0.206 US gallons per foot. One short ton of this pipe is about 1247 ft.
Does NPS 2 schedule 5 pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 2 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 2.245 in (57.0 mm) to match.