NF E39-016-1/IN1*NF EN 15632-1/IN1:2015 District heating pipes - Pre-insulated flexible pipe systems - Part 1 : classification, general requirements and test methods
2015NF E39-016-1/IN1*NF EN 15632-1/IN1:2015 District heating pipes - Pre-insulated flexible pipe systems - Part 1 : classification, general requirements and test methods