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Hitachi Ltd
Hitachi Power Engineering Co Ltd
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Hitachi Ltd
Hitachi Power Engineering Co Ltd
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Application filed by Hitachi Ltd, Hitachi Power Engineering Co LtdfiledCriticalHitachi Ltd
Priority to JP18101687ApriorityCriticalpatent/JPS6427778A/en
Publication of JPS6427778ApublicationCriticalpatent/JPS6427778A/en
Butt Welding And Welding Of Specific Article
(AREA)
Abstract
PURPOSE:To improve the weld quality by inserting and fixing filler metal between base metals and performing the welding in the state. CONSTITUTION:The outside diameter of the external side 1 of a small diameter pipe as the base metal is cut and a square cross-sectional filler ring 3 is inserted into the spigot surface. Further, the external side 1 is inserted into the base metal 2 whose inside diameter is cut. By this method, the filler ring 3 is fixed between the base metals and in the state, the automatic fillet welding is performed. Accordingly, at the time of performing all position welding, the burn through of the filler ring 3 is eliminated and satisfactory deposited metal is formed. As a result, the welding quality is remarkably improved.
JP18101687A1987-07-221987-07-22Method for welding pipes
PendingJPS6427778A
(en)