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Cast iron pipe, a tube cast from cast iron. Cast iron pipes are used for water, drainage and gas transfer lines, which include cast iron straight pipes and fittings. Labor intensity is small. According to different casting methods, it is divided into continuous cast iron pipe and centrifugal cast iron pipe. The centrifugal cast iron pipe is divided into sand type and metal type. According to the material, it is divided into gray cast iron pipe and ductile iron pipe. According to the interface form, it is divided into flexible interface, flange interface, self-anchored interface, rigid interface and so on. Among them, the flexible cast iron pipe is sealed with rubber ring; the flange interface cast iron pipe is fixed by flange, the inner pad rubber flange gasket is sealed; the rigid joint generally has a large cast iron pipe socket, and the straight pipe is inserted and sealed with cement. This process is now basic elimination.
Ordinary drainage cast iron sockets and fittings. The flexible anti-vibration interface drains the cast iron straight pipe. The cast iron pipe is sealed by rubber ring and bolted, and has good flexibility and flexibility under internal water pressure. It can adapt to large axial displacement and lateral deflection, and is suitable for indoor drainage pipes of high-rise buildings, especially suitable for seismic zones. From the interface form, it can be divided into: W-type flexible cast iron drain pipe, B-type flexible cast iron drain pipe, and A-type flexible cast iron drain pipe.
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