1.Five layers PE(PE-X,PPR,PE-RT),STEEL,PE 2.OHSMS,R.I.SO9001,ISO Certificate 3. ... .Raw material:PE(PE-X,PPR,PE-RT)& Steel2.PE(PE-X,PPR,PE-RT) STEEL PE pipe is made of five ... 20mm to 200mm 3.This PE(PE-X,PPR,PE-RT)-STEEL-PE composite pipe is widely use for hot & cold ... ;R.I.SO9001 Certificates verify,PE(PE-X,PPR,PE-RT) STEEL PE pipe is in top quality. 5.The goods ...