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           Trench pipe connection is an advanced way of pipe connection, that is, it can be set up or buried, that is, there are steel joints and flexible joints. Therefore, it has a wide range of applications.

    (1) according to the system: it can be used for the firewater system, air conditioning cold and hot water system, water supply system, petrochemical pipeline system, thermoelectric and military pipeline system, sewage treatment pipeline system and so on.

    Material according to pipe material: can be used to connect steel pipe, copper pipe, stainless steel pipe, lining plastic pipe, ductile cast iron pipe, thick wall plastic pipe and hose and valve with pipe joint and flange joint.

           The design specification of automatic sprinkler system suggests that the connections of the system pipes should be connected by grooved connectors or wire buckles and flanges. The pipes in the system with or larger than 100mm should be connected by flanges or grooves.
           The trench pipe fittings connection technology, also known as clamp connection technology, has become the first push technology of liquid and gas pipeline connection. Although the technology has been developed in China later than abroad, it is quickly accepted by the domestic market because of its advanced technology. Since its development in 1998, after several years of development and application, it has gradually replaced the two traditional pipe connections of flanges and welding. It is not only technically more mature, but also widely recognized by the market, and has been actively guided by national laws and policies.
    The application of trench pipe connection technology makes the complicated pipe connection process simple, quick and convenient. It made a big step forward in the pipe connection technology.

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