DOUBLE PIPE, DOUBLE PIPE CONNECTING MEMBER AND MANUFACTURING METHOD OF DOUBLE PIPE AND DOUBLE PIPE CONNECTING MEMBER

摘要

PURPOSE: A double pipe, a double pipe connecting member and a manufacturing method of a double pipe and a double pipe connecting member are provided to easily manufacture a double pipe and a double pipe connecting member and to easily assemble a double pipe with a double pipe connecting member. CONSTITUTION: A double pipe is formed by filling an insulation material(30) between an inner pipe(10) and an outer pipe(20). A double pipe connecting member comprises an inner pipe connecting member, an outer pipe connecting member, and an insulation material filled between the inner pipe connecting member and the outer pipe connecting member. Female threads(40) are formed on the end portions of the inner pipe and the outer pipe. Male threads(50) are formed on the outer circumferences of the inner pipe connecting member and the outer pipe connecting member.