1.process :Butt-welded&Overlap 2.cold or hot water,gas series 3.ISO,CE, ... materials aluminum and plastic .1.process :Butt-welded&Overlap2.cold or hot water,gas series3.ISO,CE,AENOR, EMI ... best after service Main Composite Pipe(Butt-welded and Overlapping-welded) can beclassified as follow:PPR-AL-PPR ... ;10. Pipes used for irrigation project in agriculture or garden;11. Pipes used for gas suction under ...