| 摘要 |
PURPOSE:To absorb errors in the dimensional accuracy of piping and to weld pipings without welding rods by disposing rings onto both ends of a sleeve which joins both pipings indirectly and sleeves 2 on the outer sides of the rings respectively then melting the rings. CONSTITUTION:After a piping 5 is first set, a sleeve 2, a ring 3, as sleeve 4, a ring 3 and a sleeve 2 are positioned onto the piping 5 successively and a piping 1 is so set with the sleeve 4 that the groove face thereof is mated with the groove face of the piping 5. The sleeve 2, 4 and the rings 3 are brought into tight contact with each other. Thereafter, a torch of a welder is located at the center of the rings 3 and an arc is generated to melt and join the sleeves 4, 2, 2, the pipings 1, 5 and the rings 3, 3 together. If penetration beads are produced in this case, this welded joint has the strength equal to that of the base materials. |
