The scope of application of extended waterproof casing.

Extended flexible waterproof casing is divided into two types are extended flexible waterproof casing and extended rigid waterproof casing.
Longer flexible waterproof casing is in the original national standard flexible waterproof casing structure based on the same case, lengthen the length of the body to make, usually when some pipelines encounter the thickness of the wall penetrated more than the length of the national standard flexible waterproof casing 300mm, you can no longer use the length of the national standard waterproof casing on the 02S404 waterproof casing atlas.
Extended flexible waterproof casing is mainly used to protect the pipeline from damage, the pipeline through the railway, cross the road, go to the street, etc., in order to prevent the pipeline from being crushed by the load, and set up a protective casing outside the pipeline, such as large diameter concrete pipes, large diameter steel pipes, etc. to avoid external forces acting directly on the outer wall of the pipeline, causing the pipeline to break, and measures.
Extended flexible waterproof casing is generally used in areas with seismic requirements, in these areas, the wall of the pipe will be subject to vibration and the pipe will be deformed or the structure will be affected; rigid waterproof casing is generally used for the general waterproof structure where the pipe passes through the wall; waterproof casing is used in construction, chemical industry, steel, water, sewage treatment and other units.