BS 7291-2:2006 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings - Specification for polybutylene (PB) pipes and associated fittings
This part of BS 7291 specifies requirements and methods of test for
polybutylene (PB) pipes and associated fittings intended for use within
buildings for the conveyance of 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 1 Before reading this part, it is essential that BS 7291-1 is read.
This standard specifies general requirements for materials to be used for
or in the form of PB pipes, with or without a barrier layer or associated
fittings and components. Particular requirements are also specified for
PB pipe alone or jointed with push-fit, fusion or 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 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.
NOTE 2 Pipes and fittings of non-barrier PB are to some extent permeable
to oxygen; hence, if they are used for the primary circuit(s) of a heating
system, it might be beneficial to add a corrosion inhibitor to the fluids
circulating therein. In such a case the manufacturer(s) of the pipe and/or
fitting should, upon request, provide advice in accordance with BS 5955-8.
This advice should include selection of a compatible corrosion inhibitor and/
or methods for reducing the permeability.
BS 7291-2:2006 history
2023BS 7291-2:2010+A1:2023 Thermoplastics pipe and ?tting systems for hot and cold water for domestic purposes and heating installations in buildings - Specification for polybutylene (PB) pipe and associated fittings
2010BS 7291-2:2010 Thermoplastics pipe and fitting systems for hot and cold water for domestic purposes and heating installations in buildings - Specification for polybutylene (PB) pipe and associated fittings
2006BS 7291-2:2006 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings - Specification for polybutylene (PB) pipes and associated fittings
2001BS 7291-2:2001 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings - Specification for polybutylene (PB) pipes and associated fittings