Overview
CEN ISO/TS 15876-7:2018 - "Plastics piping systems for hot and cold water installations - Polybutylene (PB) - Part 7: Guidance for the assessment of conformity" provides requirements and practical guidance for assessing conformity of polybutene (PB) compounds, products and assemblies intended for hot and cold water and heating installations inside buildings. It is intended to be implemented in manufacturers’ quality plans and used to establish certification procedures. The Technical Specification complements the other parts of ISO 15876 and includes a basic test matrix in Annex A to help users plan conformity assessment.
Key topics and requirements
- Scope & applicability: Conformity assessment guidance for PB piping systems for domestic water and heating applications under the relevant design pressures and temperatures described in ISO 15876 series.
- Testing & inspection framework: Defines the organization and purpose of tests used for conformity assessment:
- Type testing (TT)
- Batch release tests (BRT)
- Process verification tests (PVT)
- Audit tests (AT)
- Indirect tests (IT)
- Grouping principles: Guidance on grouping by pressure class, pipe/fitting sizes and fitting groups to rationalize testing.
- Sampling, frequency & records: Guidance on test sampling, test frequency and maintenance of test records to support a manufacturer’s quality management system.
- Roles & competence: Describes responsibilities of manufacturers, testing laboratories, inspection bodies and certification bodies (references to preferred compliance with ISO/IEC 17065 and ISO/IEC 17020 where applicable).
- Informative tools: Annex A provides a basic test matrix to aid planning of type tests and factory control testing.
Practical applications
- Use this Technical Specification to design and document a conformity assessment scheme for PB piping products (pipes, fittings, joints, assemblies).
- Integrate the testing and inspection regimen into a manufacturer’s quality plan and quality management system.
- Support the development of third‑party certification procedures and audit criteria for PB piping systems.
- Provide structured evidence for regulators, specifiers and procurement teams that a PB system meets the applicable ISO 15876 requirements.
Who should use this standard
- PB piping manufacturers and compound suppliers - to establish factory tests and batch release procedures.
- Certification bodies and inspection bodies - to set certification and audit processes.
- Testing laboratories - to plan and perform type and audit tests.
- Specifiers, engineers and regulators - to interpret conformity evidence for building water and heating installations.
Related standards
Keywords: CEN ISO/TS 15876-7:2018, polybutylene (PB) piping, assessment of conformity, type testing, batch release tests, quality plan, hot and cold water installations.