Patent ID: 9644774
Date: 2017-05-09
CPC Classifications: B29C,F16L

Claim:
1. A welding joint, said welding joint comprising a joint body, a synthetic resin-made tube and a synthetic resin-made holder, said joint body having a pipe end portion into which an end portion of said synthetic resin-made tube can be inserted and being configured so that said pipe end portion is welded to said end portion of said synthetic resin-made tube by heating of a heater which externally surrounds said pipe end portion, and said synthetic resin-made holder having a body portion and a flange which are fitted and externally attached onto said pipe end portion so as to be positioned between said pipe end portion of said joint body and said heater, said flange being connected to said body portion so as to make it possible to ensure a radial expansion gap between said body portion and said heater, and an outer diameter of said flange attached onto said pipe end portion being larger than an outer diameter of said body portion attached onto said pipe end portion, wherein an end surface, in a direction of an axis of said synthetic resin-made holder, of said body portion of said synthetic resin-made holder is coplanar with an end surface, in a direction of an axis of said joint body, of said pipe end portion.