BS EN 727:1995 Plastics piping and ducting systems. Thermoplastics pipes and fittings. Determination of Vicat softening temperature (VST)
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This standard specifies a method for determining the Vicat softening temperature (VST) of pipes and fittings (see note) of thermoplastics materials, based on method B of ISO 306: 1987, i.e. using aforce of (50 ±1) N and a rate of temperature
A measure of the temperature is obtainable only for those thermoplastics for which the softening BATA
NOTE. The term fittings is intended to also cover valves and other ancillaries made of thermoplastics material(s).