Waterproof casing is a pipe across the railway, roads, streets, etc., in order to prevent the pipe being crushed by the load waterproof casing size, and in the pipeline externally set protective casing. Waterproof casing is divided into rigid waterproof casing and flexible waterproof casing. Rigid waterproof casing is a steel pipe plus wing ring; flexible waterproof casing addition to the external wing ring, internal as well as stalls circle like that. Waterproof casing wall bushing called waterproof casing manufacturers, wall pipe. Flexible waterproof casing is applied to place the pipe through the wall by vibration or water tight structures required hardware fittings external waterproof casing, the general production enterprises are developed in accordance with Building Research design standard set of manufacture. Flexible waterproof casing wall at the wall, in case of non-concrete should switch to concrete walls, it must be solidified in a casing wall; flexible waterproof casing is applied widely used in construction, chemical, steel, water, sewage treatment, etc. units. Flexible waterproof casing | waterproof casing | Serco supply materials provided by Serco Gongyi City Water Supply Materials Limited. Serco Gongyi City Water Supply Materials Co., Ltd. (www.gyxjbcq.com/) strong, credible, in Zhengzhou, Henan valve industry has accumulated a large number of loyal clients. The company better work attitude and constantly improving innovative ideas will lead Serco supply material and you work into the brilliant, for a better future!