To provide a pipe connection device that can be inexpensively manufactured.
A right end of a header linking tube 3 is fitted to a left end of a connection tube 13, and a left end of a first header piece 2A is fitted to a right end. Annularly extending first and second engagement surfaces 11c, 12c are formed on a right end outer circumferential surface of the header linking tube 3 and a left end outer circumferential surface of the first header piece 2A, respectively. First and second engagement protruding parts 14, 15 engaged with the first and second engagement surfaces 11c, 12c, respectively, are formed on a left end inner circumferential surface and a right end inner circumferential surface of the connection tube 13. The first and second engagement protruding parts 14, 15 are arranged so that ends thereof adjacent in the circumferential direction of the connection tube 13 are in contact with each other or separated from each other in the circumferential direction.
TAKAHASHI YOSHIKATSU
SAITO TATSUHIKO
IWAKATA MARIO
WATANABE HIROKI
MIYAZAKI TAKAYUKI
KOYO SANGYO LTD
Harada Sanjugi