Copper Pipes - BS EN 1057: TABLE X    Suitable for use in hot and cold water supply system, sanitary drainage and wide variety of plumbing, building and engineering work. It is particularly suitable for bending.
These tubes may be joined using compression or capillary fittings manufactured to BS EN 1254. They may also be connected using silver brazing methods.

Size of Tube	Outside Diameter		Nominal Thickness	Maximum Working Pressures
	Maximum	Minimum
mm	mm	mm	mm	bar
15	15.045	14.965	0.7	58
22	22.055	21.975	0.9	51
28	28.055	27.975	0.9	40
35	35.07	34.99	1.2	42
42	42.07	41.99	1.2	35
54	54.07	53.99	1.2	27
67	66.75	66.60	1.2	20
76.1	76.30	76.15	1.5	24
108	108.25	108.0	1.5	17