TSE CEN ISO/TS 15875-7

TSE CEN ISO/TS 15875-7 addresses guidance for assessing conformity of crosslinked polyethylene (PE-X) piping systems used in hot and cold water installations. Rather than defining the full performance profile of the system, this part focuses on how conformity for PE-X compounds, products and assemblies can be organised within a manufacturer’s quality plan and used as a basis for certification procedures.

What is covered in conformity assessment

The document applies to compounds, products and assemblies assessed in accordance with the relevant part(s) of ISO 15875. In practical quality-management terms, that means establishing a structured way to verify that materials and finished items remain consistent with the applicable technical requirements. The emphasis is on the assessment framework itself, not on replacing the product-specific requirements found in the other parts of the series.

Why PE-X systems need this kind of guidance

From a general technical perspective, PE-X is a crosslinked form of polyethylene widely used in plumbing because crosslinking improves resistance to heat deformation and supports long-term service behaviour. In hot and cold water installations, the distinction between raw compound, manufactured product and assembled system matters: each stage can affect durability, dimensional stability and overall reliability. Guidance on conformity assessment helps align these stages with quality control and certification practices.

• This part gives guidance for conformity assessment of PE-X systems.
• It covers compounds, products and assemblies.
• Assessment is tied to the applicable parts of ISO 15875.
• It is intended for inclusion in a manufacturer’s quality plan.
• It also supports the establishment of certification procedures.