NPS 22 Schedule 80 Pipe
22.000 in (558.8 mm) outside diameter on a 1.125 in (28.6 mm) wall, giving a 19.750 in (501.6 mm) bore and 250.82 lb/ft (373.26 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 22 (DN 550)
- Schedule
- Schedule 80
- Outside diameter
- 22.000 in (558.8 mm)
- Wall thickness
- 1.125 in (28.6 mm)
- Inside diameter
- 19.750 in (501.6 mm)
- Weight, empty
- 250.82 lb/ft (373.26 kg/m)
- Weight, water filled
- 383.63 lb/ft (570.90 kg/m)
- Flow area
- 306.354 in² (197648 mm²)
No other designation in NPS 22 shares this wall thickness, so Schedule 80 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 this page | 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 | 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 80 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 80 pipe?
19.750 in (501.6 mm). The outside diameter is fixed at 22.000 in (558.8 mm) by ASME B36.10M, and the 1.125 in (28.6 mm) wall takes 2.250 in off it — 1.125 in from each side — leaving that bore.
How much does NPS 22 schedule 80 pipe weigh?
250.82 lb/ft (373.26 kg/m) empty, as plain-end carbon steel. Full of water it comes to 383.63 lb/ft (570.90 kg/m), because the bore holds 15.915 US gallons per foot. One short ton of this pipe is about 8 ft.
Does NPS 22 schedule 80 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 19.750 in (501.6 mm) to match.