NPS 30 Extra Strong (XS) Pipe
30.000 in (762.0 mm) outside diameter on a 0.500 in (12.7 mm) wall, giving a 29.000 in (736.6 mm) bore and 157.53 lb/ft (234.43 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 30 (DN 750)
- Schedule
- Extra Strong (XS)
- Outside diameter
- 30.000 in (762.0 mm)
- Wall thickness
- 0.500 in (12.7 mm)
- Inside diameter
- 29.000 in (736.6 mm)
- Weight, empty
- 157.53 lb/ft (234.43 kg/m)
- Weight, water filled
- 443.89 lb/ft (660.57 kg/m)
- Flow area
- 660.520 in² (426141 mm²)
In NPS 30 this wall thickness is also designated Schedule 20. That is the same pipe under another name, not a different product — but the coincidence is specific to this size and does not hold across the range.
Every schedule in NPS 30
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 | 0.2506.35 mm | 29.500749.30 mm | 79.43118.21 kg/m | 35.506 |
| Sch 10 | 0.3127.92 mm | 29.376746.15 mm | 98.93147.22 kg/m | 35.208 |
| Sch 20 | 0.50012.70 mm | 29.000736.60 mm | 157.53234.43 kg/m | 34.313 |
| Sch 30 | 0.62515.88 mm | 28.750730.25 mm | 196.08291.80 kg/m | 33.724 |
| STD | 0.3759.52 mm | 29.250742.95 mm | 118.65176.57 kg/m | 34.907 |
| XS this page | 0.50012.70 mm | 29.000736.60 mm | 157.53234.43 kg/m | 34.313 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Common questions
What is the inside diameter of NPS 30 extra strong (xs) pipe?
29.000 in (736.6 mm). The outside diameter is fixed at 30.000 in (762.0 mm) by ASME B36.10M, and the 0.500 in (12.7 mm) wall takes 1.000 in off it — 0.500 in from each side — leaving that bore.
How much does NPS 30 extra strong (xs) pipe weigh?
157.53 lb/ft (234.43 kg/m) empty, as plain-end carbon steel. Full of water it comes to 443.89 lb/ft (660.57 kg/m), because the bore holds 34.313 US gallons per foot. One short ton of this pipe is about 13 ft.
Does NPS 30 extra strong (xs) pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 30 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 29.000 in (736.6 mm) to match.