Flexible waterproof casing is a short pipe with a caliber larger than the outside diameter of the installed pipe and meets the requirements when the pipeline passes through the inner wall of the foundation, floor slab and other parts to avoid leakage or interference with the building during the use of the pipeline, and also to facilitate the installation and maintenance of the pipeline. Flexible waterproof casing is generally used in the pipeline through the wall by vibration or strict waterproof requirements of the building; mainly used in construction, steel, chemical, water, sewage treatment and other units.
Flexible waterproof casing specifications DN50, DN80, DN150, DN200 and so on, it can be said that there are many kinds of steel pipe on how many kinds of waterproof casing, waterproof casing using the size of the specifications to be determined according to the size of the steel pipe, usually the size of waterproof casing to be larger than the size of steel pipe. In other words, the key basis for the specification of flexible waterproof casing is the type of steel pipe worn.
