If a welded joint lacks sufficient strength and fails under design load, which process requirement was most likely overlooked?
Correct edge preparation before welding
The strength of a welded joint depends on the filler and base metal fusing completely across the full thickness of the joint, giving a sound, load-bearing cross-section.
Correct edge preparation, such as beveling the plate edges and setting a proper root gap, opens the joint so the arc can reach and melt right down to the root.
If this preparation is overlooked, the weld penetrates only shallowly, leaving an incomplete throat that cannot carry the design load and fails.
Post-weld grinding only improves the surface appearance after welding, so skipping it affects finish, not the internal strength of the joint.
Marking the weld centre line with a scriber is a layout aid that helps positioning but does not determine how deeply the weld fuses.
Using the maximum nozzle size changes gas coverage or bead width, not the root fusion, so it is not the requirement whose absence caused the failure.
Hence, the answer is Correct edge preparation before welding.
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Important Questions from Welding
The flame which contains excess oxygen than theoretical required:
In gas welding, the inclination of the blow pipe with respect to the plate in Leftward welding is-
In resistance welding, the SCR contactor will close during ____
In the flash butt welding:
Carburising flame is used to weld metals like _____.
