Abstract:Plastic composite pipes, also known as steel-plastic pipes or plastic-lined pipes, are steel pipes connected by high-density polyethylene and have the...
Plastic composite pipes, also known as steel-plastic pipes or plastic-lined pipes, are steel pipes connected by high-density polyethylene and have the characteristics of steel pipes and plastic pipes. Steel-plastic composite pipes generally use threaded connections for specifications within 100 mm, slotted connections for 100-200 mm specifications, and flange welding for specifications above 200 mm.
Before connecting pipes and joints, it is necessary to check the adhesive in the pipes. Then connect the joint to the button at the upper end of the pipe. After checking whether the lined (coated) steel pipe is inserted into the joint of the joint, connect the pipe to the joint with a pipe wrench.
After the pipe is connected to the joint, any exposed threads, pliers marks or scratches on the surface should be coated with rust inhibitor. Pipe joints made with anaerobic sealants must not be pressure tested for a period of time. Composite steel pipes and plastic pipes cannot be directly connected with valves, but special transition pipe fittings whose internal and external threads are plastic-lined brass. The connection with the pipe fittings can be done in various ways to save work and effort, such as twisting, sleeves, flanges, grooves and welding.
In our daily life, the status of steel-plastic composite pipes is becoming more and more important, not only because of its very good connectivity, but also because of its anti-corrosion properties and strong bonding properties in many fields. The steel-plastic composite pipe not only has a very smooth inner wall, but also has a very low friction, which makes it tough, impact resistant, pressure resistant and light.
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