scope:

This European Standard specifies materials, assembly dimensions and tolerances and test requirements for fittings of copper and copper alloys with or without plating or coating.
This Part of EN 1254 specifies short cup ends suitable only for capillary brazing in the size range 14,7 mm to 159 mm for the purposes of joining copper tubes intended for use in hot or cold or combined hot and cold water, heating and cooling systems, natural gas and liquified petroleum gas.
Permissible operating temperatures and maximum operating pressures are also established.
This standard is applicable to capillary fittings for joining the following tubes:
. Copper tubes to EN 1057;
. Pre-insulated copper tubes to EN 13349.
Fittings may also be suitable for joining other tubes provided the capillary joint with the specified tube meets the requirements of this standard.
Fittings may comprise a combination of any of the end types specified in EN 1254 or other standards, provided they are suitable for the fluid/gas being conveyed and provided that any components can either withstand the brazing operation or be removed temporarily.
The standard establishes a designation system for the fittings.