What is the difference between rigid and flexible waterproofing casing?

Rigid waterproofing is relatively poorer than flexible waterproofing in terms of strain on temperature differences and more prone to cracking and seepage.
Rigid waterproof casing is a steel pipe plus wing ring structure is simple, installed in the concrete wall, and rigid casing is mainly used in the basement areas that need to wear pipe. And flexible casing by the flange casing, sealing ring, flange pressure plate, wing ring, bolt, nut composition, complex structure, with internal retaining ring, mainly for the use of human defense wall, commonly used in sewage treatment, chemical industry, construction, etc..
Flexible casing-high tensile strength, high elongation, light weight, easy construction, can adapt to certain deformation and expansion, not easy to crack. Rigid casing-rigid waterproofing long service life, simple construction process, convenient materials, easy maintenance.
Only waterproof requirements, the use of rigid waterproof casing; not only waterproof requirements, and vibration and displacement requirements, the use of flexible waterproof casing. Therefore, flexible waterproof casing is more expensive than rigid waterproof casing.