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What are the differences between flexible waterproof casing and civil air defense airtight casing

Time: 04-27 󰃯 Reading times: 712 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: The flexible waterproof sleeve is different from the civil air defense closed sleeve. The flexible waterproof sleeve is integrated into the structure with vibration or tight waterproof requirements where the pipeline passes through the wall. Refer to 02s404. Civil air defense sealed sleeve is used to pass through civil air defense area. Flexible waterproof sleeve

flexibility Waterproof casing It is different from the air defense sealing sleeve, Flexible waterproof casing Refer to 02s404 for structures with vibration or tight waterproof requirements where the pipeline passes through the wall. Civil air defense sealed sleeve is used to pass through civil air defense area. Flexible connection is used between flexible waterproof casing and pipeline, and rigid connection is selected for civil air defense sealing sleeve. Civil air defense sealing sleeve and Rigid waterproof casing The structure is similar, only one more wing ring than the rigid waterproof casing, and there is also a baffle to prevent shock wave. The baffle plate is directly welded with wing ring and pipeline. If the civil air defense airtight casing is set between the two defense areas, the wing ring and shock wave baffle must be set on both sides of the civil air defense closed sleeve.
Because the flexible waterproof casing has airtight wing ring and protective resistance piece, it should be treated carefully when the pipeline passes through the closed partition wall, and the reserved hole is not allowed, otherwise the civil air defense works will be scrapped; When the pipeline passes through the foundation beam or basement wall, it can prevent the basic settlement pressure on the pipeline. When the thermal pipeline is too long, it is necessary to install a square waterproof sleeve to reduce the "thermal expansion and cold contraction" on the pipeline. The extended waterproof sleeve can also be used, which is suitable for the structure where the pipeline passes through the wall and does not bear the pipe vibration and expansion deformation Structure, suitable for pipeline through the wall space is limited or pipeline installation first with the structure or pipeline transformation. For areas with seismic protection requirements, if rigid waterproof casing is selected, flexible connection should be set near the pipe entering the side wall or building wall.
When making air defense sealed casing, the thickness of wing ring and casing shall meet the requirements of national standard. Both sides of casing wing ring shall be fully welded on both sides, and the weld shall be full, flat and smooth without slag inclusion, air hole, bubble and crack. After welding, clean up the welding slag and spray the antirust paint. After the installation of civil air defense sealed casing, the pipe orifice shall be level with the wall, beam and column surface, and the two ends of the casing shall be clamped and fixed by more than three sides of reinforcement, and shall not be skewed.
The civil air defense airtight casing adopts rigid connection, which is similar to the structure of rigid return casing, except that one or more wing rings are added outside the rigid waterproof casing, and the baffle plate is also provided to prevent shock wave. The baffle plate is directly welded with the wing ring and pipeline.
Civil air defense sealed sleeve electrical need to cut 5cm (additional resistance piece). The length of the pipe hoop from the inner side (pipe hoop) to the wall is 5cm. The length of the pipe hoop should be reserved, about 10cm as a whole. The rest do not need to go out of the wall. If the civil air defense sealed casing is set between two personal defense areas, wing ring and shock wave baffle should be set on both sides of the civil air defense closed casing.