Building "waterproof casing" pipeline crossing basement waterproof requirements, when structures, set up a special production casing. Common rigid waterproof casing. Rigid waterproof casing, the need to weld sealing ring wing outer casing wall thickness of the sleeve, the wall thickness of the ring-wing have strict requirements specification waterproof casing, the new lengthened waterproof casing, for the thicker wall custom lengthened waterproof casing, to meet regulatory requirements through thick walls. Wear an actual diameter pipe work, and enlarge the mouth with more, strictly speaking, is a special type, for engineering requirements are very strict waterproof casing Which is good, and the latter part of the pipeline dredge media after waterproof casing Which is cheap, there will be greater pressure inside the tube so necessary to use relatively thick wall pipes for construction, but also take DN100 example: the same casing pipe diameter or 146mm, the gland will need further machining lathe needs to be processed into the inner diameter of 133mm, suitable to wear tube outer diameter 114mm pipe therethrough. Which is good waterproof casing, Serco supply material (certified), waterproof casing provided by Serco Gongyi City Water Supply Materials Co., Ltd. Serco Gongyi City Water Supply Materials Co., Ltd. (www.gyxjbcq.com/) is Zhengzhou, gate leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Serco leadership material in the water with the staff warmly welcome all inquiries negotiations to create Serco supply material a better future.