Plastics piping systems for non-pressure underground drains and sewers - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 4: Assessment of conformity

This technical specification addresses the conformity assessment procedures for structured wall pipe systems designed for non-pressure underground drainage and sewerage applications. The scope encompasses systems manufactured from unplasticized polyvinyl chloride (PVC-U), polypropylene (PP), and polyethylene (PE). It establishes the specific requirements and methodologies necessary to verify that these plastic pipe systems meet the technical performance criteria outlined in the broader family of standards. The document provides a structured framework for evaluation, focusing on the consistency of manufacturing processes and the adherence to defined material and dimensional properties. This part specifically deals with the verification of compliance, ensuring that the final products are suitable for their intended use in subsurface infrastructure. It details the assessment protocols that manufacturers and testing bodies must follow to demonstrate that the pipe systems conform to the applicable technical rules. By defining these assessment methods, the document supports the consistent quality and safety of underground drainage networks across the region, facilitating trade and technical harmonization without altering the fundamental design or material specifications of the pipe systems.