2 inch pipe dimensions: OD and wall thickness by schedule
Deskely Completions team Singapore
A 2 inch pipe, NPS 2 or DN 50, has an outside diameter of 60.3 mm (2.375 inches) in every schedule. The nominal size is a name, not a measurement: the outside diameter is larger than 2 inch. The schedule sets the wall thickness, and with it the inside diameter and the weight.
The table gives every schedule listed for NPS 2 in ASME B36.10M and B36.19M, in mm and inches.
- Outside diameter: 60.3 mm (2.375 in), the same for every schedule.
- Schedule 40: 3.91 mm wall, 52.5 mm inside diameter.
- Schedule 80: 5.54 mm wall, 49.2 mm inside diameter.
- Metric equivalent: DN 50.
2 inch pipe dimensions by schedule
| Schedule | Wall mm (in) | ID mm (in) | kg/m (lb/ft) |
|---|---|---|---|
| Schedule 5S | 1.65 (0.065) | 57.00 (2.244) | 2.39 (1.60) |
| Schedule 10S | 2.77 (0.109) | 54.76 (2.156) | 3.93 (2.64) |
| Schedule 10 | 2.77 (0.109) | 54.76 (2.156) | 3.93 (2.64) |
| Schedule 30 | 3.18 (0.125) | 53.94 (2.124) | 4.48 (3.01) |
| STD (standard) | 3.91 (0.154) | 52.48 (2.066) | 5.44 (3.65) |
| Schedule 40 | 3.91 (0.154) | 52.48 (2.066) | 5.44 (3.65) |
| XS (extra strong) | 5.54 (0.218) | 49.22 (1.938) | 7.48 (5.03) |
| Schedule 80 | 5.54 (0.218) | 49.22 (1.938) | 7.48 (5.03) |
| Schedule 160 | 8.74 (0.344) | 42.82 (1.686) | 11.11 (7.47) |
| XXS (double extra strong) | 11.07 (0.436) | 38.16 (1.502) | 13.44 (9.03) |
Nominal dimensions. Weights are for plain-end carbon steel; stainless steel is about 2 percent heavier. Mill tolerances apply, and your project pipe specification takes precedence.
2 inch pipe outside diameter
The outside diameter of NPS 2 pipe is 60.3 mm, or 2.375 inches, whatever the schedule, so 2 inch fittings and flanges fit every wall thickness. In metric drawings and specifications the same size is called DN 50.
It is larger than 2 inch because, below NPS 14, the nominal size is a traditional name that once roughly matched the bore, not the outside.
Nearby sizes
- 1-1/2 inch pipe dimensions: OD 48.3 mm
- 2-1/2 inch pipe dimensions: OD 73 mm
Every size and schedule in one table: the pipe schedule chart.
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Frequently asked questions
What is the OD of 2 inch pipe?
60.3 mm (2.375 inches), the same for every schedule.
What is the wall thickness of 2 inch schedule 40 pipe?
3.91 mm (0.154 in), giving an inside diameter of 52.5 mm (2.066 in).
What is the wall thickness of 2 inch schedule 80 pipe?
5.54 mm (0.218 in), giving an inside diameter of 49.2 mm (1.938 in).
What is 2 inch pipe in DN?
DN 50.
How much does 2 inch schedule 40 pipe weigh?
5.44 kg/m (3.65 lb/ft) for plain-end carbon steel.
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