▎ 摘　　要

NOVELTY - The pipe has a heat preservation layer that is provided on the outer side of a working pipe structure (1). The outer side of the heat preservation layer is filled and fixed with the polyethylene layer. The polyurethane resin layer is provided on the outer side of the polyethylene layer. The outer side of the polyurethane resin layer is filled and fixed with the graphene layer. The polyurethane resin layer and the graphene layer are sealed. An air barrier layer filled with carbon dioxide gas between the polyurethane resin layer and the graphene layer. The outer surface of the graphene layer is coated with thermal insulation material. The outer side of the graphene layer is filled and fixed with the aluminum foil radiation layer, and the waterproof layer is provided outside the aluminum foil reflective layer. The material used for the waterproof layer is neoprene. The mounting base (10) includes a round stainless steel sleeve (101) and a stainless steel base (102). USE - Large-diameter insulated pipe used for transportation of liquids, gases and other media. ADVANTAGE - The insulated pipe has good insulation, heat reflection, heat insulation and anti-radiation functions, the fire extinguishing performance is achieved, has rational design and precise structure and the function of reducing heat loss is achieved. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the large-diameter insulated pipe for reducing heat loss. Working pipe structure (1) Mounting base (10) Stainless steel sleeve (101) Stainless steel base (102) Mounting hole grooves (103)