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Engineering ToolBox > Copper Tubes to BS (British Standard) 2871 - Dimensions and Working Pressures
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 0C and its coefficient of linear expansion is 16.8 x 10-6 per 0C (between 20oC and 100oC).
(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 | ||