NPS 4 Schedule 5 Pipe
4.500 in (114.3 mm) outside diameter on a 0.083 in (2.1 mm) wall, giving a 4.334 in (110.1 mm) bore and 3.92 lb/ft (5.83 kg/m) empty. ASME B36.10M.
- Nominal size
- NPS 4 (DN 100)
- Schedule
- Schedule 5
- Outside diameter
- 4.500 in (114.3 mm)
- Wall thickness
- 0.083 in (2.1 mm)
- Inside diameter
- 4.334 in (110.1 mm)
- Weight, empty
- 3.92 lb/ft (5.83 kg/m)
- Weight, water filled
- 10.31 lb/ft (15.34 kg/m)
- Flow area
- 14.753 in² (9518 mm²)
No other designation in NPS 4 shares this wall thickness, so Schedule 5 is unambiguous in this size.
Every schedule in NPS 4
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 | 0.0832.11 mm | 4.334110.08 mm | 3.925.83 kg/m | 0.766 |
| Sch 10 | 0.1203.05 mm | 4.260108.20 mm | 5.618.35 kg/m | 0.740 |
| Sch 40 | 0.2376.02 mm | 4.026102.26 mm | 10.7916.06 kg/m | 0.661 |
| STD | 0.2376.02 mm | 4.026102.26 mm | 10.7916.06 kg/m | 0.661 |
| Sch 80 | 0.3378.56 mm | 3.82697.18 mm | 14.9822.30 kg/m | 0.597 |
| XS | 0.3378.56 mm | 3.82697.18 mm | 14.9822.30 kg/m | 0.597 |
| Sch 120 | 0.43811.13 mm | 3.62492.05 mm | 19.0028.28 kg/m | 0.536 |
| Sch 160 | 0.53113.49 mm | 3.43887.33 mm | 22.5133.50 kg/m | 0.482 |
| XXS | 0.67417.12 mm | 3.15280.06 mm | 27.5440.99 kg/m | 0.405 |
Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.
Flanges for NPS 4 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 4.334 in (110.1 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 | 9.00228.60 mm | 0.9423.88 mm | 7.50190.50 mm | 8 × 5/8 in |
| Class 300 | 10.00254.00 mm | 1.2531.75 mm | 7.88200.15 mm | 8 × 3/4 in |
| Class 400 | 10.00254.00 mm | 1.3835.05 mm | 7.88200.15 mm | 8 × 7/8 in |
| Class 600 | 10.75273.05 mm | 1.5038.10 mm | 8.50215.90 mm | 8 × 7/8 in |
| Class 900 | 11.50292.10 mm | 1.7544.45 mm | 9.25234.95 mm | 8 × 1 1/8 in |
| Class 1500 | 12.25311.15 mm | 2.1253.85 mm | 9.50241.30 mm | 8 × 1 1/4 in |
| Class 2500 | 14.00355.60 mm | 3.0076.20 mm | 10.75273.05 mm | 8 × 1 1/2 in |
Fittings for NPS 4 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 4 |
|---|---|---|
| 90° Long Radius Elbow | Centre-to-end A | 6.00152.40 mm |
| 90° Short Radius Elbow | Centre-to-end A | 4.00101.60 mm |
| 45° Long Radius Elbow | Centre-to-end B | 2.5063.50 mm |
| Straight Tee | Centre-to-end C and M | 4.12104.65 mm |
| Reducing Tee | Run centre-to-end C | 4.12104.65 mm |
| Concentric Reducer | End-to-end H | 4.00101.60 mm |
| Eccentric Reducer | End-to-end H | 4.00101.60 mm |
| Cap | Length E | 2.5063.50 mm |
Common questions
What is the inside diameter of NPS 4 schedule 5 pipe?
4.334 in (110.1 mm). The outside diameter is fixed at 4.500 in (114.3 mm) by ASME B36.10M, and the 0.083 in (2.1 mm) wall takes 0.166 in off it — 0.083 in from each side — leaving that bore.
How much does NPS 4 schedule 5 pipe weigh?
3.92 lb/ft (5.83 kg/m) empty, as plain-end carbon steel. Full of water it comes to 10.31 lb/ft (15.34 kg/m), because the bore holds 0.766 US gallons per foot. One short ton of this pipe is about 511 ft.
Does NPS 4 schedule 5 pipe use special flanges or fittings?
No. Flanges and buttweld fittings are dimensioned from NPS, so NPS 4 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 4.334 in (110.1 mm) to match.