NPS 22 Schedule 140 Pipe
22.000 in (558.8 mm) outside diameter on a 1.875 in (47.6 mm) wall, giving a 18.250 in (463.5 mm) bore and 403.01 lb/ft (599.74 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 22 (DN 550)
- Schedule
- Schedule 140
- Outside diameter
- 22.000 in (558.8 mm)
- Wall thickness
- 1.875 in (47.6 mm)
- Inside diameter
- 18.250 in (463.5 mm)
- Weight, empty
- 403.01 lb/ft (599.74 kg/m)
- Weight, water filled
- 516.42 lb/ft (768.51 kg/m)
- Flow area
- 261.587 in² (168765 mm²)
No other designation in NPS 22 shares this wall thickness, so Schedule 140 is unambiguous in this size.
Every schedule in NPS 22
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 | 0.1884.78 mm | 21.624549.25 mm | 43.8065.18 kg/m | 19.078 |
| Sch 10 | 0.2185.54 mm | 21.564547.73 mm | 50.7175.47 kg/m | 18.972 |
| Sch 20 | 0.3759.52 mm | 21.250539.75 mm | 86.61128.89 kg/m | 18.424 |
| Sch 30 | 0.50012.70 mm | 21.000533.40 mm | 114.81170.86 kg/m | 17.993 |
| STD | 0.3759.52 mm | 21.250539.75 mm | 86.61128.89 kg/m | 18.424 |
| Sch 60 | 0.87522.22 mm | 20.250514.35 mm | 197.42293.79 kg/m | 16.731 |
| Sch 80 | 1.12528.57 mm | 19.750501.65 mm | 250.82373.26 kg/m | 15.915 |
| XS | 0.50012.70 mm | 21.000533.40 mm | 114.81170.86 kg/m | 17.993 |
| Sch 100 | 1.37534.92 mm | 19.250488.95 mm | 302.88450.74 kg/m | 15.119 |
| Sch 120 | 1.62541.27 mm | 18.750476.25 mm | 353.61526.24 kg/m | 14.344 |
| Sch 140 this page | 1.87547.62 mm | 18.250463.55 mm | 403.01599.74 kg/m | 13.589 |
| Sch 160 | 2.12553.97 mm | 17.750450.85 mm | 451.07671.27 kg/m | 12.855 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Fittings for NPS 22 pipe
ASME B16.9 dimensions come from NPS alone, so these figures hold for Schedule 140 exactly as they do for every other schedule in the size. Only the wall thickness has to be ordered to match.
| Fitting | Dimension | NPS 22 |
|---|---|---|
| 90° Long Radius Elbow | Centre-to-end A | 33.00838.20 mm |
| 90° Short Radius Elbow | Centre-to-end A | 22.00558.80 mm |
| 45° Long Radius Elbow | Centre-to-end B | 13.75349.25 mm |
| Straight Tee | Centre-to-end C and M | 16.50419.10 mm |
| Reducing Tee | Run centre-to-end C | 16.50419.10 mm |
| Concentric Reducer | End-to-end H | 20.00508.00 mm |
| Eccentric Reducer | End-to-end H | 20.00508.00 mm |
| Cap | Length E | 10.00254.00 mm |
Common questions
What is the inside diameter of NPS 22 schedule 140 pipe?
18.250 in (463.5 mm). The outside diameter is fixed at 22.000 in (558.8 mm) by ASME B36.10M, and the 1.875 in (47.6 mm) wall takes 3.750 in off it — 1.875 in from each side — leaving that bore.
How much does NPS 22 schedule 140 pipe weigh?
403.01 lb/ft (599.74 kg/m) empty, as plain-end carbon steel. Full of water it comes to 516.42 lb/ft (768.51 kg/m), because the bore holds 13.589 US gallons per foot. One short ton of this pipe is about 5 ft.
Does NPS 22 schedule 140 pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 22 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 18.250 in (463.5 mm) to match.