2021UNE-EN ISO 15876-2:2017/A1:2021 Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 2: Pipes - Amendment 1 (ISO 15876-2:2017/Amd 1:2020)
2017UNE-EN ISO 15876-2:2017 Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 2: Pipes (ISO 15876-2:2017)