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1. Rigid waterproof sleeves are suitable for cast iron pipes as well as non-metallic pipes, but the relevant dimensions must be adjusted according to the wall thickness of the pipe being used. 2. After the wing rings and steel sleeves are processed, apply a coat of primer to their outer surfaces (the primer may be red lead or linseed oil). 3. The material weight listed in the sleeve size table refers to the weight of the steel sleeve (with the sleeve length L assumed to be 200 mm) and the wing ring. The steel sleeves and wing rings are made of A3 material and welded using T42 electrodes. 4. When the sleeve passes through a wall other than a concrete wall, a concrete wall should be used instead; for Type II sleeves, the range over which concrete is poured should be 200 mm larger than the diameter of the flange (D4). 5. The thickness of the concrete wall at the waterproof sleeve shall be not less than 200 mm; otherwise, one or both sides of the wall shall be thickened, and the diameter of the thickened portion shall be at least 200 mm larger than the diameter of the flange ring (D4). 6. Rigid waterproof sleeves are usually filled with jute and asbestos cement, which is then compacted tightly after filling. Inspection standards: The welding requirements and inspection standards for rigid waterproof sleeves; ordinary sleeves are usually made of welded pipes, and their ends should be mechanically cut (using a toothless saw, for example). There are no strict requirements regarding wall thickness. These are specially designed sleeves that are used when pipes need to pass through buildings or structures where waterproofing is required, such as basements. Commonly used rigid waterproof sleeves. For rigid waterproof sleeves, there are strict requirements regarding the wall thickness of the water-stop ring wings that are welded outside the sleeve. The base materials and welding materials used in such projects must be inspected before use to ensure that they match the specified material specifications, and that their properties comply with the design documents and relevant engineering standards; only then can they be used. In engineering design documents in which the weld coefficient for waterproof sleeves is specified as 1, or in projects where relevant engineering standards or welding procedure specifications require radiographic or ultrasonic testing of all welds, the base material and welding materials used must be retested. Installation 1: Before fabricating the sleeves, carefully study the drawings and analyze how to manufacture and install the embedded sleeves. 2. When manufacturing water supply and drainage sleeves, care should be taken to ensure that after installation, the openings of these sleeves are at the same level as the finished surfaces of walls, beams, and columns. 3. The steel sleeve must be fully welded around the water-stop wing ring. 4. The slope of the pipes should be uniform, with no reverse slopes; the slope of the pipes at the roof outlet should be increased appropriately. 5. Check all pipe fittings for cracks, sand holes, and ensure that the wall thickness is uniform. 6. Before use, the pipes should be inspected for cracks and sand holes by examining their appearance, filling them with water, and flushing their outer surfaces one by one. 7. Check whether the used socket and spigot are in place, secure, and tight. 8. Support and hangers should be installed for pipeline installation in accordance with the construction acceptance specifications.