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Plastics piping systems for non-pressure underground drainage and sewerage — Structured-wall piping systems o…

Plastics piping systems for non-pressure underground drainage and sewerage — Structured-wall piping systems o…

Overview ISO 21138-2:2020 specifies definitions and requirements for structured‑wall piping systems of unplasticized poly(vinyl chloride) (PVC‑U), polypropylene (PP) and polyethylene (PE) intended fo…