2018DIN EN ISO 2507-1:2018-01 Thermoplastics pipes and fittings - Vicat softening temperature - Part 1: General test method (ISO 2507-1:1995); German version EN ISO 2507-1:2017
1995DIN EN 727:1995 Plastics piping and ducting systems - Thermoplastics pipes and fittings - Determination of Vicat softening temperature (VST); German version EN 727:1994