COAXIAL PIPE ELBOW AND METHOD OF MANUFACTURING THE PIPE ELBOW

摘要

A coaxial pipe elbow and a method of manufacturing the pipe elbow; the coaxial pipe elbow, comprising an outer conductor (10) and an inside conductor (20) stored in the outside conductor pipe (10) having bent parts (12, 21D) bent to specified angles, wherein the longitudinal cross sectional shape of the bent part (12) of the outside conductor pipe (10) is formed in an arc shape, and the longitudinal cross sectional shape of the bent part (21D) of the inside conductor (20) should desirably be formed in a partially cut out arc shape; the method of manufacturing the outside conductor pipe (10), comprising the steps of filling a metal with low melting point into a linear outside conductor pipe, bending the pipe in a metal mold in that state, and fusing the metal with low melting point by heating to remove the metal so as to provide the bent outside conductor pipe (10), whereby the coaxial pipe elbow formed of less number of parts and allowed to be assembled without using brazing can be provided.