Before the installation of plastic pipes, the construction unit shall organize the pipe manufacturers to provide technical training and technical disclosure to the operators engaged in hot-melt connection of plastic pipes, and make clear the technical points such as hot-melt working conditions, hot-melt temperature, heating time, socket operation time and socket size. Operators can only take up their posts after passing the examination.

Witness and sample the buried plastic pipes used in the heating system for inspection. For pipes of the same manufacturer, brand, material and specification, the number of sampling inspection and reinspection shall not be less than 1 time. It is forbidden to use plastic pipes without witness testing or unqualified testing in engineering.

Extended data:

Inspection requirements for PE water supply and drainage pipeline:

1, the construction unit shall, after passing the system strength leak test, backfill loose thermal insulation materials (such as composite silicate thermal insulation materials) before the cushion construction. Before the pipeline in the ditch is concealed, it should be concealed and accepted, and relevant photos or video materials of the concealed parts should be kept.

2. During the construction of indoor ground cushion, the pressure of buried plastic pipes in the cushion should keep the working pressure of the system. When the pressure drops, the cushion construction should be suspended and the leakage point should be found in time. After the maintenance is completed, the strength leakage test should be carried out again, and then the cushion construction should be continued with pressure maintenance.

3. Before the heating pipeline is concealed, the construction and supervision unit shall strictly carry out concealment acceptance, form the strength leak test record and concealed engineering acceptance data in time, and keep relevant photos or video data of concealed parts.

Beijing Municipal Commission of Housing and Urban-Rural Development-Notice on Strengthening the Quality Management of Buried Plastic Pipe and Thermal Welding Joint for Heating in Newly Built Civil Buildings