... RT)& Steel2.PE(PE-X,PPR,PE-RT) STEEL PE pipe is made of five layers,both outer and inner ... layers are Plastic,Steel in the middle,and two layers ... -X,PPR,PE-RT)-STEEL-PE composite pipe is widely use for hot & cold water,underfloor heating,no leakage,no corrosion4 ... Certificates verify,PE(PE-X,PPR,PE-RT) STEEL PE pipe is in top quality. 5.The goods must ...