HEAT-INSULATING COMPOSITE STRUCTURE PIPE BODY

摘要

PURPOSE: To raise thermal insulation efficiency and heat collision resistance by chill molding an elastic thermal insulation layer formed by surrounding the outer periphery of an inner pipe with a thermal insulation body having a thermal insulation space into an outer pipe of cast metal. CONSTITUTION: A thermal insulation composite pipe used in a ventilation manifold 1 has a composite structure comprising an inner pipe 4 of compact sintered ceramics, an elastic thermal insulation layer 5 formed by surrounding the outer periphery of the inner pipe 4 with a thermal insulation body having a thermal insulation space sealed and maintained in a bag formed by metal sheets, and an outer pipe 6 of cast metal formed by chill molding the elastic thermal insulation layer 5.