What are the roles of rigid and flexible waterproof casing?
Rigid waterproof casing is suitable for buildings that are not subject to pipeline vibration and expansion deformation when passing through the wall. For areas with seismic requirements, if rigid waterproof casing is used, a flexible connection should be provided near the pipe entering the building wall or exterior wall.
1. Rigid waterproof casing is suitable for non-metallic pipes and cast iron pipes, but should be adjusted according to the thickness of the pipe wall.
2. After wing ring and steel casing processing, the outer wall is painted once with primer (primer containing lead or cold primer oil).
3. The material weight listed in the casing size table is the weight of steel casing.
4. If there is no concrete wall, the casing through the wall should be changed to concrete wall. The diameter of Class II casing should be 200mm larger than the machine wing ring. casing is poured into the wall and the material in the casing should be pressed tightly.
5. the thickness of the concrete wall at the waterproof casing shall not be less than 200mm, otherwise the side or sides of the wall shall be thickened, the diameter of the thickened part shall be less than the diameter of the machine wing ring greater than 200mm. rigid waterproof casing shall be filled with oil hemp and asbestos cement.
Rigid waterproof casing is steel pipe plus wing ring, installed in the wall, for general pipeline wall penetration, conducive to wall waterproofing; flexible waterproof casing in addition to the outer wing ring, there are flanges inside the line, there are sales, but also can be processed by themselves. For example, when the pipeline is connected to the pump, that is, if we consider the waterproof performance of both sides of the wall, we should choose flexible waterproof casing. If we only consider the walls of the pipe, without considering the waterproof performance of both sides of the wall and the displacement deformation of the pipe, we can choose rigid waterproof casing.
