1.Five layers PE(PE-X,PPR,PE-RT),STEEL,PE 2.OHSMS, ... life 1.Raw material:PE(PE-X,PPR,PE-RT)& Steel2.PE(PE-X,PPR,PE-RT) STEEL PE ... Diameter from 20mm to 200mm 3.This PE(PE-X,PPR,PE-RT)-STEEL-PE composite pipe is widely ... corrosion4.With LRQA ISO9001:2000;ISO14001;CJ/T 183-2008;CJ/T 253;OHSMS;R.I.SO9001 Certificates verify ... ,PE(PE-X,PPR,PE-RT) STEEL PE pipe is in top ...