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RUIDUO pipe is five layer composite pipes, consisting of an overlapped or butt welded aluminum core with an inner and outer layer, made of High-Density polyethylene (HDPE) Cross-Linked (PEX) or polyethylene Raised Temperature (PE-RT) . All layers are permanently bonded together by intermediate adhesive layers. The pipe combines the advantages of a metal and plastic pipe and eliminates the disadvantages of both materials at the same time. The aluminum core is absolutely tight. A special welding technique ensures high reliability. The aluminum thickness for Ruiduo pipe has been selected to meet compressive and flexural strength requirements. It reliably prevents oxygen/ gas from permeating into pipe. It compensates and reduces snap-back forces and heat expansion with change of temperature.

1. Overlapped welded pipe is co-extruded with one step with perfect adhesive between inner layer and aluminum, high and stable pressure resistance, of which welding style is ultrasonic.
2. Butt welded pipe is moulding with several steps that is argon-arc welding style.