A. Flexible waterproof casing: external welding water wing ring, inside a gasket, flanges connection, according to the actual situation of piping design customized made, used for waterproof wall on both sides need to do, it is recommended that you use flexible waterproof casing. Such as submersible pump water supply and drainage system pipe wall at both ends to give waterproof processing, waterproofing
structure.
B. Rigid waterproofing casing: the outer wall of casing welding waterproof wing ring. In advance according to the engineering drawings design institute issued structure waterproof casing embedded in the concrete wall, if only consider the pipe wall,
without considering the wall, the wall on both sides of the waterproof performance and displacement of pipeline deformation, can choose rigid waterproofing casing, usually for the basement, civil air defense engineering wall waterproof.
1: Waterproof casing head adopt nodular cast iron pipe, rubber ring socket interface, the pipe bridge using D325 x 8 welded steel pipe, along the embedded pipe using D219 x 6 welded steel pipe.
2: Before construction needs to test of pipe fittings and valves, their level of stress should not be below the pipeline working pressure of 1.5 times, after the material approach and tested before pipe to pipe and accessories, including documentary evidence and physical examination.
3: Waterproof casing pipe in the transportation, loading and unloading and stacking process it is forbidden to throw or fierce collision. The laid of the pipeline shall be carried out in the inspection qualified rear can, before laying pipes for pipe material, pipe fittings and so on to conduct a appearance inspection, found that there is a problem of pipe and pipe fittings shall be used.
4: Lifting of waterproof casing pipe into the slot, should use reliable soft belt spreader, smooth groove, shall not be violent collisions with the tank bottom and wall. Scattered along the groove configuration when the piping, reduce the secondary handling, in order to ensure the accurate position of the scale level, should be placed in a tube with a center inspection when the pipeline coordinates of center line is flagging whether the center alignment with the center of the level of overlap.
