Advantages and disadvantages of PPR lined stainless steel pipe and PPR aluminium plastic pipe
PPR lined stainless steel tubeAdvantage：Stainless steel lining pipe, high temperature resistance, can transport hot water, boiling water, steam, and safety and health. The installation of stainless steel tube after the whole bearing pipe resistance, impact resistance, corrosion resistance and other properties to strengthen and enhance the original tube, not only can be used for civilian water and gas, can also be used for fluid transportation industry.shortcomingOnce the processing is not well controlled, it is easy to cause stainless steel and PPR delamination.
1 、 aluminum plastic composite pipe including lap welding aluminum plastic composite pipe and butt welding aluminum plastic composite pipe, butt welding, the thickness of the aluminum strip and welding process requirements are relatively high.2, the existence of lap welding aluminum layer, increased the modulus of the pipe, and the wall thickness is more thick, installation of pipe is more difficult to bend, need to use more pipe fittings for connection, therefore, field construction is more difficult than PP-R. And the plastic aluminum steady state composite tube must first strip off the outer protective layer, the adhesive layer and the aluminum layer before welding, and then can connect. If the adhesive layer is not clean, it will lead to welding unreliable and leak point.
1 、 excellent resistance to temperature and pressurePP-R tube and aluminum layer organic combination, with higher strength and better temperature resistance, pressure resistance performance, more suitable for high temperature hot water field use2, small thermal expansion deformationThe thermal expansion coefficient is small (3 x 10-5m/m - C), similar to metal pipe, avoid the pipe deformation due to temperature changes, reduce the number of free arm compensation for pipe deformation, is ideal for heating and central air-conditioning system.3, light blocking oxygenThe intermediate aluminum layer is insulated from oxygen to avoid the oxidation and corrosion of the metal parts in the heating and central air conditioning system, thus effectively prolonging the service life of the system.
PP-R aluminium plastic steady tubePP-R aluminium plastic steady tube is a composite pipe made of PP-R tube and aluminum layer. It is based on maintaining the original PP-R tube size unchanged, using hot melt adhesive technology on the outer surface and the thickness of 0.15-0.25mm aluminum strip under high temperature organic adhesive, then coated with 0.2mm around the PP-R (or PE) protective layer produced. It has five layers of polypropylene, aluminum, gum and polypropylene. Its intermediate aluminum layer acts as a strengthening agent to combine PP-R plastic with metal. It also has flexibility of plastic pipe and rigidity of metal tube. Through the integration of aluminum layer to achieve stable mechanical properties, with higher strength and better resistance to high temperature.Advantage：PP-R steady-state aluminum plastic pipe into the PP-R tube and the metal tube in one of the advantages, at the same time with PP-R tube health and sealing and metal pipe rigidity, forming a unique superior general plastic pipe has special properties, linear expansion coefficient, impervious to physical properties of oxygen, anti UV, high strength, high temperature resistance so excellent.
