| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding implement that can reduce work burden of maintenance, and to provide a welded structure, welding method, and a method for removing the welding implement. SOLUTION: Spacers 4a, 4b, which are formed in the thickness of a required gap using a lost material having sublimation and solubility in water or oil, are interposed between the opposing end faces of a projecting annular part 1c in a socket 1 and of pipes 2a, 2b respectively, consequently the required gap for the thickness portion of the spacers 4a, 4b is secured between the opposing end faces of the projecting annular part 1c in the socket 1 and of the pipes 2a, 2b. In this state, both ends of the socket 1 and the outer circumference of the pipes 2a, 2b are welded together. COPYRIGHT: (C)2011,JPO&INPIT
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