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AS/NZS 1462.22:2023 Methods of test for plastics pipes and fittings Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2016, IDT)
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AS/NZS 1462.22:2023 identically adopts ISO 9969:2016, which specifies a test method for determining the ring stiffness of thermoplastics pipes having a circular cross section