20 inch pipe (DN 500): outside diameter, wall thickness and weight by schedule
A 20 inch pipe (DN 500) has a 508 mm (20.000 in) outside diameter in every schedule: what changes is the wall, and with it the inside diameter and the weight. Designations that give the same wall share a row.
| Schedule | Wall | ID | Weight |
|---|---|---|---|
| Sch 5 / 5S | 4.78 mm (0.188 in) | 498.44 mm (19.624 in) | 59.32 kg/m (39.82 lb/ft) |
| 10S | 5.54 mm (0.218 in) | 496.92 mm (19.564 in) | 68.65 kg/m (46.10 lb/ft) |
| Sch 10 | 6.35 mm (0.250 in) | 495.30 mm (19.500 in) | 78.56 kg/m (52.78 lb/ft) |
| Sch 20 / STD / 40S | 9.53 mm (0.375 in) | 488.94 mm (19.250 in) | 117.15 kg/m (78.67 lb/ft) |
| Sch 30 / XS / 80S | 12.70 mm (0.500 in) | 482.60 mm (19.000 in) | 155.13 kg/m (104.23 lb/ft) |
| Sch 40 | 15.09 mm (0.594 in) | 477.82 mm (18.812 in) | 183.43 kg/m (123.23 lb/ft) |
| Sch 60 | 20.62 mm (0.812 in) | 466.76 mm (18.376 in) | 247.84 kg/m (166.56 lb/ft) |
| Sch 80 | 26.19 mm (1.031 in) | 455.62 mm (17.938 in) | 311.19 kg/m (209.06 lb/ft) |
| Sch 100 | 32.54 mm (1.281 in) | 442.92 mm (17.438 in) | 381.55 kg/m (256.34 lb/ft) |
| Sch 120 | 38.10 mm (1.500 in) | 431.80 mm (17.000 in) | 441.52 kg/m (296.65 lb/ft) |
| Sch 140 | 44.45 mm (1.750 in) | 419.10 mm (16.500 in) | 508.15 kg/m (341.41 lb/ft) |
| Sch 160 | 50.01 mm (1.969 in) | 407.98 mm (16.062 in) | 564.85 kg/m (379.53 lb/ft) |
Plain-end weight of carbon steel pipe, by the standard's own formula: 10.69 × (D − t) × t in lb/ft, with D and t in inches (0.0246615 × (D − t) × t in kg/m, in mm). Austenitic stainless weighs about 2% more.
Lay out on 20 inch pipe
The outside diameter and the wall of the chosen schedule go to the calculator, which opens with them filled in and draws without an account.
Questions
- What is the outside diameter of 20 inch pipe?
- 508 mm (20.000 in), in any schedule: it is the DN 500 pipe of ASME B36.10M. The wall changes with the schedule, and the inside diameter with it.
- What is the wall thickness of 20 inch schedule 40 pipe?
- 15.09 mm (0.594 in), with an inside diameter of 477.82 mm (18.812 in); carbon steel pipe weighs 183.43 kg/m (123.23 lb/ft).
- What is the difference between schedule 40 and 80 in 20 inch pipe?
- The wall: 15.09 mm (0.594 in) in schedule 40 and 26.19 mm (1.031 in) in 80. The outside diameter is the same, so schedule 80 has the smaller bore -- 455.62 mm (17.938 in) against 477.82 mm (18.812 in) -- and weighs 311.19 kg/m (209.06 lb/ft) against 183.43 kg/m (123.23 lb/ft).
Flanges for 20 inch pipe
By schedule
- Schedule 5
- Schedule 5S
- Schedule 10
- Schedule 10S
- Schedule 20
- Schedule 30
- Schedule 40
- STD
- Schedule 40S
- Schedule 60
- Schedule 80
- XS
- Schedule 80S
- Schedule 100
- Schedule 120
- Schedule 140
- Schedule 160
- XXS