1, the material is different, can use live metal connection, large diameter can be flange connection. Looking for a double live connection, one is PB, one is PERT, PB is different from PERT raw material, can not be directly welded.
2, PP-R (polypropylene random) tube called type three polypropylene pipe and is also called the PP-R pipe or PPR pipe, with energy saving, environmental protection, high strength, corrosion resistance, with smooth inner wall has the advantages of scale, construction and easy maintenance, long service life, widely used in building water supply and drainage, urban and rural areas city water supply and drainage, gas, electricity and cable sheath, industrial fluid transportation, agricultural irrigation construction, municipal, industrial and agricultural fields. The PP-R pipe is made of random copolymerized polypropylene and is extruded into tubes and molded into tubes.
3, PE-RT tube, heat resistant polyethylene pipe is Polyethylene of raised temperature resistance pipe English acronym, is a kind of hot water can be used for non crosslinked polyethylene pipe, is also highlighting its non crosslinked characteristics, called it "the high temperature non crosslinked polyethylene pipe".