Yanshan Xingsong Steel Pipe Co

Steel-in-steel insulated steel pipes are divided into three structures (Manager Wang
They are steel-in-steel directly buried
insulated steel pipes, steel-in-steel steam
insulated steel pipes and steel-plastic composite pipes. Steel-in-case steel The quality of the external waterproof and anti-corrosion layer of the directly buried insulated steel pipe protection structure (external waterproof and anti-corrosion layer) is mainly a matter of hardness. Without hardness, there is no effectiveness.
In the early stage, the outer protective layer mostly used plastic-coated steel type and high-density Polyethylene pipe is used as the outer casing. Engineering practice shows that this kind of outer casing has good waterproof and anti-corrosion properties and is easy to construct, but its fatal weakness is its poor temperature resistance. The patching problem cannot be solved, and water is easy to enter from the joints. When the local heat flow in the pipe leaks out, , easily destroyed by hot melt and creep, and are not suitable for directly buried steam pipes.
Xingsong Steel Pipe Watermark
During this period, fiber reinforced plastic (glass fiber reinforced plastic) pipes were also used for external protection, which were resistant to The temperature capacity is much higher than that of FRP, it has good waterproof and anti-corrosion properties, high strength, and is easy to construct. It is an ideal material for the outer sheath. However, the manufacturing process of FRP is different and the difference is very big. The quality of the FRP made is very different, so fiberglass must be used. Mechanical winding process.