1 Scope
This European Standard specifies materials and test requirements for fittings of copper
and copper alloys.
This part of EN 1254 specifies push-fit end connections with or without plating or coating in the size
range 6 mm to 54 mm for the purpose of joining tubes of copper, plated copper, multilayer
pipes and plastics pipes, intended for use in hot and cold water systems according
to EN 806, which are designed for service lifetime up to fifty years, as well as heating and
cooling systems.
Permissible operating temperatures and maximum operating pressures are also established.
Fittings may comprise a combination of end types, specified in this European Standard,
EN 1254, or other standards, providing they are suitable for the fluid being conveyed.
The standard establishes a designation system for the fittings.
This European Standard is applicable to push-fit fittings for joining one or more
of the following tubes or pipes:
-
— Copper tubes to EN 1057;
-
— PE-X pipes to EN ISO 15875‑2;
-
— PB pipes to EN ISO 15876‑2;
-
— PP pipes to EN ISO 15874‑2;
-
— PE-RT pipes to EN ISO 22391‑2;
-
— Multilayer pipes to EN ISO 21003‑2.
Fittings may be suitable for joining other tubes and pipes provided the push-fit joint
with the specified tube or pipe meets the requirements of this standard.
Operating temperatures and pressures
For joints with copper tubes
It is essential that operating temperatures and maximum operating pressures for assembled
joints do not exceed the values in Table 1.
Table 1
—
Operating temperatures and pressures for fittings assembled to tubes
|
Operating temperature
°C
|
Maximum operating pressure (MOP) for nominal diameters from 6 mm up to and including 54 mm
bar
|
| 30 |
16 |
| 95 |
6 |
|
Intermediate pressure ratings are determined by linear interpolation.
Certain designs of push-fit fittings are suitable for use at temperature/pressure
ratings outside those given in this table. For such applications, the advice of the
manufacturer should be sought.
To allow for system malfunctions, it is essential that fittings be capable of temporary
excursions up to a temperature of 110 °C at a pressure of 6 bar.
|
For joints with multilayer and plastics pipes
The operating temperatures and maximum operating pressures for the assembled joints
should be determined in accordance with multilayer or plastics pipe material properties,
details of which are specified in the relevant multilayer and plastics piping system
standards.