Rifeng Multilayer PE/AL/PE and PERT/AL/PERT pipes

non-crosslinked multilayer pipes includes PE/AL/PE and PERT/AL/PERT pipes. They are structure for five-layer composite which materials from inside to outside are respectively PE or PERT, adhesive, aluminium, adhesive, PE or PERT, that combines the advantages of a metal and plastic pipe. The Aluminium core is preformed tight by overlapped welded or butt welded to reliably prevent oxygen or gases from permeating. Inner layer and outer layer are PE or PERT material. PE refers to polyethylene material and PERT refers to polyethylene material of raised temperature resistance. 

Complied with ISO 21003:2008 for cold and hot water supply and ISO 17484:2014 for gas installation, Rifeng multilayer PE/AL/PE and PERT/AL/PERT pipes are designed to be used under normal working pressure and temperature condition for 50 years. It offers a high degree of flexibility and toughness, coupled with high pressure and temperature resistance. It reduces snap-back force and minimizes thermal expansion. Rifeng multilayer PE/AL/PE pipe could be used for gas application with normally yellow for outer layer and black for inner layer. Multilayer PERT/AL/PERT pipes can be used for cold and hot water supply, under-floor heating applications. There are different colours for reference of outer and inner layers to indicate different applications and to achieve specified performance. White is used to water supply while yellow is gas installation. As well, other colours like red, blue, purple, orange can be customized.