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Overview ISO 21138-1:2020 specifies material requirements and performance criteria for structured‑wall piping systems made from unplasticized poly(vinyl chloride) (PVC‑U), polypropylene (PP) and poly…
Overview - ISO 21138-3:2020 (structured-wall piping systems, Type B) ISO 21138-3:2020 defines requirements for structured-wall piping systems made from unplasticized poly(vinyl chloride) (PVC‑U), pol…
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…