GB/T 29047-2021
ActivePrefabricated directly buried insulating pipes and fittings with polyurethane foamed-plastics and high density polyethylene casing pipes
高密度聚乙烯外护管硬质聚氨酯泡沫塑料预制直埋保温管及管件
Application Summary AI generated
This standard specifies the technical requirements, test methods, and inspection rules for prefabricated insulated pipes and fittings used in direct-buried heating pipelines. It is applied in district heating systems for transporting hot water or steam, where the pipe assembly consists of a steel service pipe, rigid polyurethane foam insulation, and a high-density polyethylene outer casing. The standard ensures long-term thermal efficiency and mechanical protection for underground heating networks in urban construction and industrial applications.
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