Automatic welding method of nuclear island main pipes
A welding method and main pipeline technology, applied in the field of nuclear power, can solve the problems of inability to guarantee welding quality and welding thickness, lack of timely treatment measures, breakdown of filled weld beads, etc., and achieve the effects of reducing the quantity, shortening the construction period, and shortening the welding period.
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[0039] The welding bead distribution diagram of the nuclear island main pipeline automatic welding welding method according to the embodiment of the present invention is as follows figure 2As shown, it is suitable for all-position automatic welding of narrow gaps in pipes with a diameter ≥ 325 mm and a wall thickness ≥ 40 mm. 0 ~ 1.0mm, the combined groove includes the upper groove and the lower groove, the lower groove includes the lower blunt edge and the root blunt edge protruding from the bottom of the lower blunt edge, and the width of the top of the upper groove ranges from 16 to 24mm; Rooting welding is performed on the bottom of the root blunt edge and the lower blunt edge to form a root weld bead, which includes: penetration weld bead, first fusion bead, second fusion bead, first support bead, The second supporting welding pass, the third supporting welding pass, and the fourth supporting welding pass; perform filling welding on the lower blunt edge and the upper gro...
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