▎ 摘　　要

NOVELTY - The utility model claims a new type heat preservation pipe, comprising stainless steel inner tube and graphene, in the stainless steel pipe is provided with a polyethylene layer, the polyethylene layer in the surface is plated with silver, the stainless steel in pipe outer surface is covered with a polyurethane resin layer. the polyurethane resin layer bonded with a stainless steel inner pipe, the polyurethane resin layer is provided with overhead, the overhead layer are integrated with the polyurethane resin, the overhead and the graphene layer, between the polyurethane resin layer and the graphene layer is sealed. the polyurethane resin layer and the graphene layer are filled with carbon dioxide gas, the graphene layer is coated on the outer surface of insulated heat preservation paint, the graphene layer is coated on the outer surface of insulating silicon rubber sleeve; the insulating tube has excellent heat preservation and insulation effect, and has flame retardant function.