Four key points should be noted when installing flexible waterproof sleeves during construction

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This post was last edited by At the foot of Hengshan Slope on 2017-8-16 at 13:34. Four key points should be considered when installing flexible waterproof sleeves during construction. As we know, flexible waterproof sleeves are generally used in structures where pipes pass through walls and where there is vibration or a strict requirement for waterproofing, in order to protect the pipes from damage. When a building settles, the gap between the pipe and the sleeve allows for compensation for the difference in settlement, thereby reducing the pressure exerted by the building on the pipes. So, what should be taken into account when installing waterproof sleeves during construction? 　　1: The main waterproof sleeve pipe is made of ductile iron, with a rubber ring socket joint; the bridge-crossing pipe is a welded steel pipe of D325×8, while the branch pipes embedded along the route are welded steel pipes of D219×6. 2: Before construction, the pipe fittings and valves must be tested; their pressure rating should be no less than 1.5 times the operating pressure of the pipeline. Upon arrival at the site and before installation, the pipes and associated components must be inspected, including through documentary verification and physical checks. 　　3: During transportation, handling, and stacking, waterproof sleeve pipes must not be thrown or subjected to severe impacts. Piping installation shall only proceed after the trench has been inspected and found to be satisfactory. Before installing the pipes, a visual inspection of the pipes, fittings, etc. must be carried out again; any pipes or fittings with defects must not be used. 　　4: When lifting and placing the waterproof sleeve material into the trench, a reliable soft strap lifting device should be used to lower it gently, avoiding any severe impact against the bottom or walls of the trench. During piping, the pipes are arranged dispersedly along the trench to reduce secondary handling. To ensure the accuracy of the pipe placement, a level with a central scale is placed inside the pipe; during inspection, it is checked whether the centering wire hanging down along the central axis of the pipe’s coordinates coincides with the center of the level.