ISO/TS 15874-7:2018 PDF

Overview

ISO/TS 15874-7:2018 - Plastics piping systems for hot and cold water installations - Polypropylene (PP) - Part 7 provides guidance for the assessment of conformity for PP compounds, products and assemblies. It sets out requirements to be included in a manufacturer’s quality plan and supports establishment of third‑party certification procedures. The technical specification applies to PP piping systems used in buildings for hot and cold water (domestic and heating systems) under the design pressures and temperatures defined in ISO 15874 series.

Key topics and requirements

• Scope and purpose: Guidance for conformity assessment of materials, compounds, pipes, fittings, joints and assemblies intended for water installations.
• Testing framework: Defines the roles and frequencies for:
  • Type testing (TT) - proving capability to meet standard requirements.
  • Batch release tests (BRT) - tests for releasing production batches.
  • Process verification tests (PVT) - periodic checks of production processes.
  • Audit tests (AT) - independent verification by inspection or certification bodies.
  • Indirect tests (IT) and witness tests (WT) where applicable.
• Grouping and sampling: Rules for grouping by pressure class, size and fitting type; sampling plans and sample sizes for different tests.
• Quality documentation: Inclusion of test records, sampling plans and a quality plan as part of a quality management system (e.g., ISO 9001 based).
• Support materials: Annex A provides a basic test matrix to assist manufacturers and certifiers in planning conformity assessment.

Applications and users

Who uses ISO/TS 15874-7:2018:

• Manufacturers of PP pipes, fittings, valves and assemblies for hot and cold water systems - to design quality plans and internal testing regimes.
• Certification bodies and inspection bodies - to define third‑party certification and audit procedures (preferably aligned with ISO/IEC 17065 / 17020).
• Testing laboratories - to implement and document TT, BRT, PVT and AT (preferably aligned with ISO/IEC 17025).
• Specifiers, consultants and regulators - to verify product conformity and support procurement or regulatory compliance. Practical use cases include conformity assessment for potable water distribution, central heating systems and building services installations where polypropylene piping systems are specified.

Related standards

• ISO 15874 series (Parts 1, 2, 3, 5) - core material, pipes, fittings and fitness for purpose for PP systems.
• Other system standards for similar applications: ISO 15875 (PE‑X), ISO 15876 (PB), ISO 15877 (PVC‑C), ISO 21003 (multilayer), ISO 22391 (PE‑RT).
• Relevant conformity and laboratory standards: ISO/IEC 17025, ISO/IEC 17020, ISO/IEC 17065, ISO 9001.

Keywords: ISO/TS 15874-7:2018, polypropylene PP piping systems, assessment of conformity, type testing, batch release, process verification, audit tests, certification, hot and cold water installations.