What are the construction acceptance of aluminum alloy composite pipe fittings

1 The piping system shall undergo intermediate acceptance and completion acceptance according to the characteristics of the project.　　2 Concealed pipe installation should be concealed acceptance. The flatness of the pipe groove, pipe support, casing installation, anti-expansion measures should be emphatically inspected, and a hydraulic test and a water-passing capacity test should be carried out.　　3 When the exposed pipe is installed and accepted, check whether the spacing and type of supports and hangers meet the design requirements. 4 At the time of completion acceptance, the following documents should be available: '1) Construction drawings, completion drawings and design change documents; 2) Pipes and fittings factory certificate or on-site inspection records; 3) Concealed project acceptance records and intermediate acceptance records; 4) Water Records of pressure test and water flow capacity inspection; 5) Water cleaning and disinfection records of drinking water pipelines; 6) Project quality accident handling records; 7) Project quality inspection and evaluation records.　　5 The as-built quality does not meet the relevant requirements of the design requirements and construction specifications. During the completion acceptance, the following items should be checked and inspected: 1) the correctness of the coordinates, elevation and slope; 2) the neatness, firmness and airtightness of the connection points or interfaces; 3) the installation position and firmness of the supports and pipe clamps 4) The water supply capacity inspection of the water supply system, according to the design requirements, whether the maximum number of water distribution points that are open at the same time all reach the rated flow; 5) For buildings with special requirements, the water can be passed in layers and sections according to the pipeline layout Ability test; 6) The sensitivity of the instrument and the flexibility of the valve.