NPS 28 Standard (STD) Pipe
28.000 in (711.2 mm) outside diameter on a 0.375 in (9.5 mm) wall, giving a 27.250 in (692.1 mm) bore and 110.64 lb/ft (164.65 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 28 (DN 700)
- Schedule
- Standard (STD)
- Outside diameter
- 28.000 in (711.2 mm)
- Wall thickness
- 0.375 in (9.5 mm)
- Inside diameter
- 27.250 in (692.1 mm)
- Weight, empty
- 110.64 lb/ft (164.65 kg/m)
- Weight, water filled
- 363.48 lb/ft (540.91 kg/m)
- Flow area
- 583.207 in² (376262 mm²)
No other designation in NPS 28 shares this wall thickness, so Standard (STD) is unambiguous in this size.
Every schedule in NPS 28
Dimensions are given in inches, with the millimetre equivalent beneath in grey.
| Schedule | Wall thickness | Inside diameter | Weight, empty | Water (US gal/ft) |
|---|---|---|---|---|
| Sch 10 | 0.3127.92 mm | 27.376695.35 mm | 92.26137.30 kg/m | 30.577 |
| Sch 20 | 0.50012.70 mm | 27.000685.80 mm | 146.85218.54 kg/m | 29.743 |
| Sch 30 | 0.62515.88 mm | 26.750679.45 mm | 182.73271.93 kg/m | 29.195 |
| STD this page | 0.3759.52 mm | 27.250692.15 mm | 110.64164.65 kg/m | 30.296 |
| XS | 0.50012.70 mm | 27.000685.80 mm | 146.85218.54 kg/m | 29.743 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Common questions
What is the inside diameter of NPS 28 standard (std) pipe?
27.250 in (692.1 mm). The outside diameter is fixed at 28.000 in (711.2 mm) by ASME B36.10M, and the 0.375 in (9.5 mm) wall takes 0.750 in off it — 0.375 in from each side — leaving that bore.
How much does NPS 28 standard (std) pipe weigh?
110.64 lb/ft (164.65 kg/m) empty, as plain-end carbon steel. Full of water it comes to 363.48 lb/ft (540.91 kg/m), because the bore holds 30.296 US gallons per foot. One short ton of this pipe is about 18 ft.
Does NPS 28 standard (std) pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 28 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 27.250 in (692.1 mm) to match.