Brief Introduction and Difference between Flexible Waterproof Casing and Rigid Waterproof Casing Waterproof sleeve structure is divided into three types: flexible waterproof sleeve, rigid waterproof sleeve and rigid waterproof wing ring. Today, Gong Yihongsheng takes you to know the little knowledge of flexible waterproof sleeve and rigid waterproof sleeve and the difference between them. Flexible waterproof sleeve is suitable for areas requiring seismic fortification, where pipelines pass through walls to withstand vibration, pipe expansion and deformation, or external walls of structures or buildings requiring strict waterproofing. Rigid waterproofing sleeves are suitable for structures (buildings) where pipelines pass through walls and do not withstand pipeline vibration and expansion deformation. For areas requiring seismic fortification, if rigid waterproofing sleeves are used, flexible connections should be installed near pipes entering pool walls or building exterior walls. Summary: Flexible waterproofing sleeve is generally applicable to structures where pipelines pass through walls under vibration or strict waterproofing requirements. Rigid waterproofing sleeve is generally used in structures where pipelines pass through walls requiring general waterproofing; Flexible and rigid waterproofing sleeve is used in walls where pipelines pass through walls; Rigid waterproofing sleeve is used when encountering non-concrete. Concrete walls should be replaced, and casing must be solidified in the wall at one time. Packing in casing should be compactly tampered. Waterproof sleeve is used in construction, chemical industry, steel, tap water, sewage treatment and other units. Structural description of steel flexible waterproof sleeve: 1. Flexible filling materials: asphalt bast fiber, polystyrene board, polyvinyl chloride foam board. 2. Sealing paste: polysulfide sealant, polyamine grease sealant. 3. In case of non-concrete wall, concrete wall should be used locally, and the casing must be cast in the wall at one time. 4. The weight of casing is calculated by L=300. If the wall thickness is greater than 300, it should be calculated separately. Over the past few years, our Gongyi Hongsheng Pipeline Equipment Co., Ltd. has continuously developed new products, improved product quality, done a lot of research and experiments, put forward a new product structure, greatly improved the performance of the products, and won the praise of the vast number of users. If special specifications of products are needed, they can be designed and manufactured according to user's requirements. And sincerely hope that new and old customers, design units recommend the use of our company's products.