How to maintain rigid waterproof casing through the wall in the application.

How to maintain the rigid waterproof casing through the wall Waterproof casing corrosion prevention and painting: before shot blasting rust removal, check the ellipticity of all the pipeline, thickness and material is not in line with the standards of raw materials, otherwise it can not be applied. Shot blasting rust removal should remove the surface layer of the pipe paint, vegetable grease, metal oxides, etc., to be agreed by QC units and community owners and make a good record, you can anti-corrosion and painting. The pipeline corrosion prevention is carried out according to the engineering drawings and standard regulations. Brush paint before sufficient mixing and blending primer, with cotton yarn head or air compression to remove the dust and water on the surface of the pipeline, the same day the anti-rust treatment of the pipeline on the same day to brush the primer, the primer is not dry before, not the primer, the pipeline surface primer should be proportional, no leakage. Both sides of the pipe stay 50mm above the paint, the same specification type, thickness and material of the pipe as far as possible to put together antirust treatment, antirust treatment should be marked to move, brush primer finished, each pipe has to be marked to move the pipeline antirust treatment, brush paint finished both sides of the pipe should be closed, transport and lifting the whole process to avoid the pipeline plating is destroyed, should be used to protect measures.
Rigid waterproof casing should be based on building construction drawings, structural pipe surface drawings and its building elevation drawings, to clarify the length of the casing. Then based on the water supply and drainage plan and construction drawings, and refer to the building atlas to make. Water supply and drainage casing should be made with attention to the installation of the branch pipe and the wall, beam, column for face level. Steel casing shall be welded through with the water stop wing ring nearby. After the installation of electrical equipment casing branch pipe on both sides should be stretched out of the wall, beam, face 5cm -10cm. when making waterproof casing, wing ring and casing thin and thick should meet the requirements of the provisions, waterproof casing wing ring on both sides should be welded through on both sides, and weld round, neat, smooth, no weld tumor, no bubbles, no cracks and other conditions. After welding on, the weld marks are handled neatly, and then brush two times above the anti-corrosion paint.