NPS 4 1/2 Pipe Dimensions
Outside diameter 5.000 in (127.0 mm) — fixed across every schedule. 5 wall thicknesses from ASME B36.10M, with bore, plain-end weight and flow area for each.
- Nominal size
- NPS 4 1/2
- Metric designator
- DN 115
- Outside diameter
- 5.000 in (127.0 mm)
- Schedules listed
- 5
- Standard weight wall
- 0.247 in (6.3 mm)
- Extra strong wall
- 0.355 in (9.0 mm)
Every schedule in NPS 4 1/2
Dimensions are given in inches, with the millimetre equivalent beneath in grey.
| Schedule | Wall thickness | Inside diameter | Weight, empty | Flow area (in²) | Water (US gal/ft) |
|---|---|---|---|---|---|
| Sch 40 | 0.2476.27 mm | 4.506114.45 mm | 12.5418.66 kg/m | 15.95 | 0.828 |
| STD | 0.2476.27 mm | 4.506114.45 mm | 12.5418.66 kg/m | 15.95 | 0.828 |
| Sch 80 | 0.3559.02 mm | 4.290108.97 mm | 17.6126.21 kg/m | 14.45 | 0.751 |
| XS | 0.3559.02 mm | 4.290108.97 mm | 17.6126.21 kg/m | 14.45 | 0.751 |
| XXS | 0.71018.03 mm | 3.58090.93 mm | 32.5348.41 kg/m | 10.07 | 0.523 |
Weight is calculated for carbon steel as w = 10.6802 × t × (OD − t) lb/ft and is the plain-end weight, excluding coatings, linings and fittings.
Standard weight equals Schedule 40 in this size. Extra strong equals Schedule 80.
This size, schedule by schedule
A page for each combination, with bore, weight, water capacity and the matching flange and fitting data.
This size in a schedule chart
Common questions
What is the outside diameter of NPS 4 1/2 pipe?
NPS 4 1/2 pipe has an outside diameter of 5.000 in (127.0 mm). That outside diameter is fixed: it is identical in every schedule, and only the wall thickness — and therefore the bore — changes from one schedule to the next.
How much does NPS 4 1/2 schedule 40 pipe weigh?
12.54 lb/ft (18.66 kg/m) as plain-end carbon steel, on a wall thickness of 0.247 in (6.3 mm).
What is the metric equivalent of NPS 4 1/2?
DN 115. DN is a dimensionless designator, not a measurement — DN 115 pipe does not measure 115 mm anywhere. Its actual outside diameter is 127.0 mm.