1. Working conditions: (1) Design drawings of all installation electromechanical works have been provided, and a joint review of drawings and design disclosure have been carried out. (2) The mechanical and electrical engineering construction technicians shall disclose the construction plan of the drawings to the team and fill in the construction technical disclosure records. (3) The installation should be carried out after the civil works are basically completed. (4) Check whether the construction water and electricity meet the construction needs. (5) Check the pipes, fittings and supporting equipment, and have product quality certificates.

2. Process flow: installation preparation→bracket production and installation→standpipe installation→branch pipe installation→pipeline pressure test, pipeline anticorrosion and heat preservation→pipeline flushing and disinfection→pipeline water supply.

3. Operating conditions: (1) The pipelines, pipe fittings and auxiliary schemes prepared according to the mechanical and electrical engineering design drawings have been prepared according to the quality requirements. (2) All drainage pipes and fittings are treated with anti-corrosion. (3) The civil construction of the drainage pipes in the ditch has been painted and cleaned up, and the construction can only be carried out after the acceptance is qualified. The technical process of mechanical and electrical engineering installation: installation preparation → drain pipe installation → support and hanger installation → riser installation → hole sealing and sealing → closed water test → water test → ball test.

Fourth, drain pipe installation: measure and record the size of the horizontal pipe, and prefabricate it on the ground according to the correct size and installation difficulty. Installation of drainage branch pipes and risers: Before installing the support camp, check whether the position and size of the reserved holes meet the requirements of the drawings and specifications according to the types and specifications of drainage equipment accessories. First, draw a crosshair on the ground that is larger than the diameter of the pipe, according to the correct size. After repairing the wound, the branch and riser can be prepared according to the size of the center of the reticle. The preparation of the riser should be closely coordinated with the civil works. Electrical construction method for mechanical and electrical engineering installation: grounding is to facilitate the grounding of users and pipelines. Piping work is one of the reasons why its installation quality in electrical engineering directly affects the success or failure of the excellent work.

If the quality of the hidden piping in the mechanical and electrical engineering is not good, it will cause a large area of civil engineering to be rough, which will seriously affect the structural strength; the quality of the exposed piping will directly affect the appearance. Concealed piping includes pipe laying in walls, roof structure, cast-in-place pipes, and pipe connections. And the bending straightness of the pipe should not be greater than 0.1 times the outer diameter of the pipe, and there should be no obvious wrinkles and depressions. When the steel pipe casing is connected, the length of the casing should be 2.5 times the diameter of the pipe, the diameter of the casing should match the diameter of the pipe, the butt joint should be located in the middle of the casing, the welded joint should be firm and tight, and the thin-walled steel pipe should not be connected with the casing. . The crimping depth of the HT fastener type thin-walled steel pipe and the pipe connection is not less than 1.0mm. After buckling, the joint gap should be sealed. The installation and piping of the mechanical and electrical engineering shall not be half-lit and half-dark, and the open pipes shall not be used to replace the blocked pipes.