BS 2871 Copper Tubes Table X, Y and Z - Working Pressures vs. Size
Working pressures of metric sized copper tubes according the BS (British Standard) 2871.
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The copper used in the manufacture of tubes is phosphorus deoxidized copper Cu-DHP defined by British Standard BS. 6017: 1981. This also corresponds to the ISO denomination Cu-DHP.
The minimum copper content is 99.85% and the residual phosphorus content is between 0.013 and 0.050%. This deoxidized copper is not affected by reducing atmospheres and consequently is well suited to welding and brazing. The density of copper is 8.9 g/cm3. its melting point is 1083 oC and its coefficient of linear expansion is 16.8 x 10-6 per oC (ranging 20 oC - 100 oC).
Note! - this standard is replaced with EN 1057 - Copper tubes for water and gas in sanitary and heating applications
For full table with Table Z - rotate the screen!
| Nom. Diameter (mm) | Outside Diameter (mm) | Table X Half hard light gauge tube | Table Y Half hard an annealed tube | Table Z Hard drawn thin wall tube | |||
|---|---|---|---|---|---|---|---|
| Thickness (mm) | Maximum Working Pressure (N/mm2) | Thickness (mm) | Maximum Working Pressure (N/mm2) | Thickness (mm) | Maximum Working Pressure (N/mm2) | ||
| 6 | 6 | 0.6 | 13.3 | 0.8 | 14.4 | 0.5 | 11.3 |
| 8 | 8 | 0.6 | 9.7 | 0.8 | 10.5 | 0.5 | 9.8 |
| 10 | 10 | 0.6 | 7.7 | 0.8 | 8.2 | 0.5 | 7.8 |
| 12 | 12 | 0.6 | 6.3 | 0.8 | 6.7 | 0.5 | 6.4 |
| 15 | 15 | 0.7 | 5.8 | 1 | 6.7 | 0.5 | 5 |
| 18 | 18 | 0.8 | 5.6 | 1 | 5.5 | 0.6 | 5 |
| 22 | 22 | 0.9 | 5.1 | 1.2 | 5.7 | 0.6 | 4.1 |
| 28 | 28 | 0.9 | 4 | 1.2 | 4.2 | 0.6 | 3.2 |
| 35 | 35 | 1.2 | 4.2 | 1.5 | 4.1 | 0.7 | 3 |
| 42 | 42 | 1.2 | 3.5 | 1.5 | 3.4 | 0.8 | 2.8 |
| 54 | 54 | 1.2 | 2.7 | 2 | 3.6 | 0.9 | 2.5 |
| 67 | 67 | 1.2 | 2 | 2 | 2.8 | 1 | 2 |
| 76.1 | 76.2 | 1.5 | 2.4 | 2 | 2.5 | 1.2 | 1.9 |
| 108 | 108.1 | 1.5 | 1.7 | 2.5 | 2.2 | 1.2 | 1.7 |
| 133 | 133.4 | 1.5 | 1.4 | 1.5 | 1.6 | ||
| 159 | 159.4 | 2 | 1.5 | 1.5 | 1.5 | ||
- 1 N/mm2 = 106 Pa = 1 MPa = 10 bar = 1.020x105 kp/m2 = 102.0 m H2O = 9.869 atm = 145.0 psi (lbf/in2)
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