GB/T 40402-2021
ActivePre-insulated composite plastic pipes with polyethylene casing
聚乙烯外护管预制保温复合塑料管
Application Summary AI generated
This standard specifies the technical requirements, test methods, inspection rules, and marking for pre-insulated composite plastic pipes with a polyethylene outer casing. It is applied in the construction industry for buried or above-ground heating pipelines, particularly in district heating systems, where thermal insulation and corrosion protection are critical. The standard ensures the pipes meet performance criteria for long-term durability and energy efficiency in central heating networks.
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