"European and American sub-direct-melting aluminum-plastic steady-state tubes use overlapping aluminum tubes as the middle layer, and the inner layer is made of PE-RTII material.(2) it is in direct contact with the output fluid, which mainly protects the aluminum layer and also has certain compression resistance.(3) The outer pressure-bearing layer made of PPR is a pipe made of special hot melt adhesive and compounded by extrusion molding.Product advantages: ① The European and American sub-direct-melting aluminum-plastic steady-state pipe not only has the corrosion resistance, anti-aging, good fluidity, no scaling and other properties of plastic pipe.(2) At the same time, it also has the advantages of high pressure resistance, light tightness, oxygen permeability, low linear expansion coefficient and difficult deformation. "