The application of flexible waterproof casing in sewage treatment works.

Waterproof casing for sewage treatment projects, this paper discusses the application of flexible waterproof casing in sewage treatment projects construction quality control.
 
Waterproof casing classification, scope of application and selection of waterproof casing in accordance with the form of structure can be divided into three types of flexible casing, rigid waterproof casing and rigid waterproof wing ring. (The difference between rigid waterproof casing and flexible waterproof casing)
 
1 . Flexible waterproof casing scope of application of flexible waterproof casing is suitable for pipelines through the pool body at the vibration and pipeline expansion and deformation, or the external wall of the building with tight waterproofing requirements. The same specification flexible waterproof casing price is 2 to 3 times the rigid waterproof casing, and in terms of installation costs, flexible waterproof casing is also slightly higher. In the sewage treatment project, flexible waterproof casing is generally used for the inlet of various pumps on the pool, or the installation of a small amount of deformation of the structure allowed.
 
2 . Rigid waterproof casing range of application rigid waterproof casing is suitable for pipeline through the wall does not bear the pipeline vibration and expansion deformation of the building. When the pipe through the wall for steel pipe, the use of A-type rigid waterproof casing; when the pipe through the wall for ductile iron steel pipe and cast iron pipe, the use of B, C-type rigid waterproof casing. Therefore, in the sewage treatment project, the process pipeline needs to cross the wall of the pool, in order to enhance the waterproof performance of the pool wall, usually using rigid waterproof casing; when the pipe through the rigid waterproof casing using steel pipe, generally plus the wing ring.
 
3 . Rigid waterproof wing ring range of application of rigid waterproof wing ring is suitable for pipeline through the wall does not bear the pipeline vibration and expansion deformation of the building. In the sewage treatment project, rigid waterproof wing ring is often used in the pipeline through the wall of the pool where space is limited or the installation of the pipeline before the pool or the renewal and transformation of the pipeline.
 
4 . Waterproof casing selection of the project used in the pump are self-priming function, the pump outlet pipe are not through the pool wall, the pipeline through the wall are not subject to pipeline vibration and expansion deformation, and, according to the design requirements, through the pool body pipeline are steel pipes, therefore, the project uses A-type rigid waterproof casing.