... raw material and added other accessory materials.This kind of pipe boasts such advantages as closed-cell structure, good aging ... apply to solar energy and air-conditioner heat preservation pipe/sheet, insulating pipe and sheet, sealing strips, top grade handle, sleeve ... heat loss.We also provide PE, PP, PPR, PB, PVC pipes, sealing strips and corrugated pipe (sylphon bellows) , etc. with high quality ...