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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) Load Calculator!	Table X Half hard light gauge tube		Table Y Half hard an annealed tube		Table Z Hard drawn thin wall tube
Nom. Diameter (mm)	Outside Diameter (mm) Load Calculator!	Thickness (mm) Load Calculator!	Maximum Working Pressure (N/mm²) Load Calculator!	Thickness (mm) Load Calculator!	Maximum Working Pressure (N/mm²) Load Calculator!	Thickness (mm) Load Calculator!	Maximum Working Pressure (N/mm²) Load Calculator!
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)

ASTM B88 - Seamless Copper Water Tubes - Working Pressure Copper Tubes Type K, L and M

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