3ply adhesive tape is composed of inner wrap tape, outer wrap tape, joint wrap tape and primer. Adhesive tape is a kind of tape anticorrosion material formed by extruding polyethylene base membrane and two butyl rubber adhesive layers and the outer tape is made up by an adhesive layer that is covered thermally on the former. The product, safe and clean, performs well in insulation, anticorrosion, mechanical strength and anticollision, moreover it is of low water absorption, long service life, wide usage and convenient in application. It is extensively used in the pipe work of oil and natural gas transportation, petrochemical industry, electric power, metallurgy, urban natural gas network of pipes, the outside anticorrosion project of the metal pipes involved as well as the outside anticorrosion project of the underground and overhead metallic conduit of the works of petrochemical industry, natural gas and coal transportation.