... .process :Butt-welded&Overlap2.cold or hot water,gas series3.ISO,CE,AENOR, EMI certificate4.top ... pipePERT-AL-PEX Composite pipeapplication1. Hot water and cold water pipe for production and domestic use;2 ... for buildings in northern, park, airport,and so on;3. Pipe used for solar energy water heater;4. ... Coal gas and natural gas pipe;5. Drinking water within a certain ...