Installation of Coated Composite Pipes
Release time:
2020-11-04
Installation and operating conditions for coated composite pipes: (1) At locations where pipes pass through walls or floor slabs,预留 pipe openings or pre-installed sleeves shall be provided. The diameters of the openings and the specifications of the sleeves must meet the requirements, and their elevations must be accurate. (2) The supports and hangers for the coated composite pipes must be installed correctly and properly positioned. (3) Indoor sewage pipelines and fittings shall be arranged in situ according to the design drawings and the actual conditions of the building structure. After verification, the elevations, positions, opening dimensions, and spacing between pipes at all locations must be correct.
Installation and Operating Conditions for Coated Composite Pipes ： ( 1 )预留 pipe holes or pre-installed sleeves at locations where pipes pass through walls and floor slabs. The hole diameters and sleeve specifications meet the requirements, and the elevations are correct. 2 ) The pipe supports and hangers for the plastic-coated composite pipes are installed correctly, and the supports and hangers have been properly positioned. 3 ) Indoor sewage pipes and fittings shall be arranged in situ according to the design drawings and the actual conditions of the building structure. Upon verification, the elevations, positions, opening dimensions, and pipe spacing at each location are all correct.
Installation Preparation ： ( 1 ) All technical documents, including construction drawings, are complete. 2 ) The pipes and other materials have been inspected, and their quality certificates, specifications, models, and quantities have all been checked and confirmed by the supervising engineer. 3 ) The construction site for the plastic-coated composite pipe, as well as the water and electricity supply for construction, meet the required standards.
After undergoing technical training, the construction personnel have become familiar with the performance of steel-plastic composite pipes and have mastered basic operational skills. Installation preparations during construction. → Riser installation → Pipeline pressure testing → Pipeline flushing. The installation sequence for underground pipelines made of coated composite pipes follows these principles: perform ground-level operations first, starting with larger-diameter pipes, proceeding from high-pressure to low-pressure lines, and installing water supply and fire protection pipelines last. Before pipeline installation, each pipe must be individually inspected to ensure its interior is clean. If it isn't, clean it thoroughly. The molds used for pipeline installation shall be inspected, adjusted, and tested according to design specifications or relevant standards. Pipeline installation shall be carried out in accordance with the plan layout drawings and single-line diagrams for the coated composite pipes. Pay attention to elevation levels, medium flow directions, types and locations of supports and hangers, pre-tightening forces, and pipe materials. Without approval from the design department and relevant authorities, the installation direction of any valve shall not be altered.
Temporary supports and hangers are not permitted for installation on campsite roads. Wire and stones are prohibited for use as temporary supports and hangers. The permanent supports and hangers must be installed as soon as possible. Pipeline installation may proceed only after welding is completed and has been approved by the inspection personnel.
Straightness of the enterprise management committee: The allowable deviation for pipelines shall not exceed. 3mm/m ; The total length of the pipeline is greater than 5m At this time, the allowable deviation of the pipeline shall not exceed. 8mm Installation of water supply risers: When installing the water hoppers, the riser clamps should be installed from the top down, following a guideline to the basement. Prefabricated risers should be arranged layer by layer according to their assigned numbers and installed in sequential order. Align with the markings, expose the threads, and use... 2-3 Remove the nozzle and check whether the nozzle’s height and direction are correct. A Exposed threads and damaged areas of the galvanized layer should be coated with rust-preventive paint. Temporary plugs should be installed at branch openings. The installation direction of network valves should facilitate operation and maintenance. After installation is complete, use pipe hangers to align and seal the floor slab openings with the structural work.
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