ISO 2507:2026Published

Thermoplastics pipes and fittings — Vicat softening temperature — General test method and test conditions for vinyl chloride-based (PVC-U, PVC-C, PVC-HI) and acrylonitrile-based (ABS, ASA) pipes and fittings

Tubes et raccords en matières thermoplastiques — Température de ramollissement Vicat — Méthode d'essai générale et conditions d’essai pour les tubes et raccords à base de chlorure de vinyle (PVC-U, PVC-C, PVC-HI) et à base d'acrylonitrile (ABS, ASA)

Abstract / scope

This document specifies a specific method for determining the Vicat softening temperature (VST) of thermoplastics pipes and fittings. It includes the adaption of method B 50 of ISO 306:2022 using a force of 50 N and a heating rate of 50 °C/h and the procedure for specimen preparation.

It includes the particular test conditions for determining the Vicat softening temperature (VST) of unplasticized poly(vinylchloride) (PVC-U) or chlorinated poly(vinylchloride) (PVC-C) pipes and fittings, for high impact resistance poly(vinylchloride) (PVC-HI) pipes and for acrylonitrile/butadiene/styrene (ABS) and acrylonitrile/styrene/acrylic ester (ASA) pipes and fittings.

This document can also be used for pipes and fittings from other materials (e.g. PE-UHMW).

Life cycle

Replaces

ISO 2507-1:1995WithdrawnThermoplastics pipes and fittings — Vicat softening temperature — Part 1: General test methodInternational Standard · Published 2 Feb 1995 · ISO/TC 138/SC 5 ISO 2507-2:1995WithdrawnThermoplastics pipes and fittings — Vicat softening temperature — Part 2: Test conditions for unplasticized poly(vinyl chloride) (PVC-U) or chlorinated poly(vinyl chloride) (PVC-C) pipes and fittings and for high impact resistance poly (vinyl chloride) (PVC-HI) pipesInternational Standard · Published 2 Feb 1995 · ISO/TC 138/SC 5 ISO 2507-3:1995WithdrawnThermoplastics pipes and fittings — Vicat softening temperature — Part 3: Test conditions for acrylonitrile/butadiene/styrene (ABS) and acrylonitrile/styrene/acrylic ester (ASA) pipes and fittingsInternational Standard · Published 2 Feb 1995 · ISO/TC 138/SC 5