1.Five layers PE(PE-X,PPR,PE-RT),STEEL,PE 2.OHSMS,R.I.SO9001,ISO Certificate 3.For both cold ... of five layers,both outer and inner layers are Plastic,Steel in the middle,and two layers glues. Out Diameter from ... to 200mm 3.This PE(PE-X,PPR,PE-RT)-STEEL-PE composite pipe is widely use for hot & cold ... .I.SO9001 Certificates verify,PE(PE-X,PPR,PE-RT) STEEL PE pipe is in top quality. 5.The goods must ...