Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings - Specification for cross-linked polyethylene (PE-X) pipes and associated fittings
This part of BS 7291 specifies requirements and test methods for
crosslinked polyethylene (PE-X) pipes and associated fittings
intended for use within buildings for the conveyance of cold water,
including drinking water, and heated water, for use in domestic hot
and cold water distribution and heating installations. These
requirements supplement the general requirements in BS 7291-1,
which are also applicable.
NOTE Before reading this part, it is essential to read BS 7291-1.
This standard specifies general requirements for materials to be used for
or in the form of PE-X pipes, with or without a barrier layer or
associated fittings and components. Particular requirements are also
specified for PE-X pipe alone or jointed with push-fit and compression
fittings conforming to BS 7291 or other British Standards intended for
use with pipes conforming to this part.
This part of BS 7291 provides for pipes dimensioned to suit two
established metric series: BS ISO 4065:1996 for thermoplastics pipes
generally and BS EN 1057, for compatibility with copper pipework
systems widely used for these applications.
This British Standard is applicable only to Class “S” pipes and
fittings.
It does not specify dimensional requirements for fittings because the
performance requirements specified for fittings, when tested
individually or in assemblies with pipe, are intended to ensure that the
dimensions of the fittings are satisfactory for jointing purposes and
pressure containment.