The Insulated Copper Pipes with Super Thick 3-layer Insulation produced with WICPE technology is developped for VRF air conditioning systems because the pipe insulated with normal thickness insulation can not effectively prevent the dewing. It does not need onsite pipe insulating nor pipe end expansion. The installer just needs to insert the pipe and weld it. It saves time and engery.The installation quality is also well guarranteed.This product fits for the requirements in refrigerant pipe lines in domestic and commercial air conditioning systems.