SHAPE OF GROOVE IN ONE-SIDE BUTT WELDING AND INSPECTION METHOD OF WELD ZONE IN ONE-SIDE BUTT WELDING

摘要

PROBLEM TO BE SOLVED: To provide a shape of a groove and an inspection method which enables a sure identification of an existing weld defect in a weld zone made by a one-side butt welding with an arc welding, by such a non-destructive testing as a radiographic testing, an ultrasonic testing, or the like. ;SOLUTION: In a welding by a fusion welding method using a filler metal, a recessed part 5, whose depth D along pipe thickness is 1 to 50% of the pipe thickness and width 2W recessed at both sides of butted planes 1b and 2b is approximately 1 to 60% of the width of a penetration bead, is formed on the butted planes 1b and 2b of pipes 1 and 2 which are objects to be welded, and used as a shape of a groove. Then a welding by one-side butt welding is so executed as the recessed part 5 does not remain, and the weld zone is inspected by such a non-destructive testing as a radiographic testing, an ultrasonic testing, or the like.;COPYRIGHT: (C)2001,JPO