NPS 8 Schedule 5 Pipe
8.625 in (219.1 mm) outside diameter on a 0.109 in (2.8 mm) wall, giving a 8.407 in (213.5 mm) bore and 9.91 lb/ft (14.75 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 8 (DN 200)
- Schedule
- Schedule 5
- Outside diameter
- 8.625 in (219.1 mm)
- Wall thickness
- 0.109 in (2.8 mm)
- Inside diameter
- 8.407 in (213.5 mm)
- Weight, empty
- 9.91 lb/ft (14.75 kg/m)
- Weight, water filled
- 33.98 lb/ft (50.57 kg/m)
- Flow area
- 55.510 in² (35813 mm²)
No other designation in NPS 8 shares this wall thickness, so Schedule 5 is unambiguous in this size.
Every schedule in NPS 8
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 | 0.1092.77 mm | 8.407213.54 mm | 9.9114.75 kg/m | 2.884 |
| Sch 10 | 0.1483.76 mm | 8.329211.56 mm | 13.4019.94 kg/m | 2.830 |
| Sch 20 | 0.2506.35 mm | 8.125206.38 mm | 22.3633.28 kg/m | 2.693 |
| Sch 30 | 0.2777.04 mm | 8.071205.00 mm | 24.7036.75 kg/m | 2.658 |
| Sch 40 | 0.3228.18 mm | 7.981202.72 mm | 28.5542.49 kg/m | 2.599 |
| STD | 0.3228.18 mm | 7.981202.72 mm | 28.5542.49 kg/m | 2.599 |
| Sch 60 | 0.40610.31 mm | 7.813198.45 mm | 35.6453.04 kg/m | 2.491 |
| Sch 80 | 0.50012.70 mm | 7.625193.67 mm | 43.3964.57 kg/m | 2.372 |
| XS | 0.50012.70 mm | 7.625193.67 mm | 43.3964.57 kg/m | 2.372 |
| Sch 100 | 0.59415.09 mm | 7.437188.90 mm | 50.9575.82 kg/m | 2.257 |
| Sch 120 | 0.71918.26 mm | 7.187182.55 mm | 60.7190.35 kg/m | 2.107 |
| Sch 140 | 0.81220.62 mm | 7.001177.83 mm | 67.76100.83 kg/m | 2.000 |
| Sch 160 | 0.90623.01 mm | 6.813173.05 mm | 74.69111.15 kg/m | 1.894 |
| XXS | 0.87522.22 mm | 6.875174.62 mm | 72.43107.78 kg/m | 1.928 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Flanges for NPS 8 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 8.407 in (213.5 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 | 13.50342.90 mm | 1.1228.45 mm | 11.75298.45 mm | 8 × 3/4 in |
| Class 300 | 15.00381.00 mm | 1.6241.15 mm | 13.00330.20 mm | 12 × 7/8 in |
| Class 400 | 15.00381.00 mm | 1.8847.75 mm | 13.00330.20 mm | 12 × 1 in |
| Class 600 | 16.50419.10 mm | 2.1955.63 mm | 13.75349.25 mm | 12 × 1 1/8 in |
| Class 900 | 18.50469.90 mm | 2.5063.50 mm | 15.50393.70 mm | 12 × 1 3/8 in |
| Class 1500 | 19.00482.60 mm | 3.6291.95 mm | 15.50393.70 mm | 12 × 1 5/8 in |
| Class 2500 | 21.75552.45 mm | 5.00127.00 mm | 17.25438.15 mm | 12 × 2 in |
Fittings for NPS 8 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 8 |
|---|---|---|
| 90° Long Radius Elbow | Centre-to-end A | 12.00304.80 mm |
| 90° Short Radius Elbow | Centre-to-end A | 8.00203.20 mm |
| 45° Long Radius Elbow | Centre-to-end B | 5.00127.00 mm |
| Straight Tee | Centre-to-end C and M | 7.00177.80 mm |
| Reducing Tee | Run centre-to-end C | 7.00177.80 mm |
| Concentric Reducer | End-to-end H | 6.00152.40 mm |
| Eccentric Reducer | End-to-end H | 6.00152.40 mm |
| Cap | Length E | 4.00101.60 mm |
Common questions
What is the inside diameter of NPS 8 schedule 5 pipe?
8.407 in (213.5 mm). The outside diameter is fixed at 8.625 in (219.1 mm) by ASME B36.10M, and the 0.109 in (2.8 mm) wall takes 0.218 in off it — 0.109 in from each side — leaving that bore.
How much does NPS 8 schedule 5 pipe weigh?
9.91 lb/ft (14.75 kg/m) empty, as plain-end carbon steel. Full of water it comes to 33.98 lb/ft (50.57 kg/m), because the bore holds 2.884 US gallons per foot. One short ton of this pipe is about 202 ft.
Does NPS 8 schedule 5 pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 8 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 8.407 in (213.5 mm) to match.