| 摘要 |
<p>PURPOSE:To prevent the corrosion of a metallic tube by fusing the end part of a duplex tube and the fitting main body of a tube fitting by the exothermicity of an exothermic body. CONSTITUTION:Synthetic resin layers 12 and 13 of a heat melting property are coated on the inner and outer peripheral surfaces of a metallic tube 11 made of aluminum, a fitting main body 22 is formed with the synthetic resin of a heat melting property, and an exothermic body 22c is buried in the connection part 22b of the body 22. In this case, when the body 22c is made exothermic, the end part of a duplex tube 10 and the body 22 can be made to fuse, consequently the inner peripheral surface of the connection part is surely sealed. Accordingly the corrosion of the tube 11 can be prevented with the possible infiltration of water in the interface of the tube 11 and a synthetic resin layer in the tube 10 eliminated.</p> |
