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SOLUTIONS: Evaluation of welds

Remember:

50% of quality is edge preparation Faults to look for:

Disalignment

If the gap is too narrow, the weld will bridge the gap, leaving slag at at the root.

Inspection prior to welding also includes verification of correct process and procedures are to be employed – that the electrode type and size and the equipment settings for voltage and amperage are as specified – and that provisions are made for required preheat or post heat.

Improperly cut edges

Groove angle and root opening

If the root opening is too wide, it will melt through

2.10

Check at regular intervals that the consumables used match specification

Each welding process has its advantages and limitations, and each introduces problems affecting joint preparation, welding procedures and operator training.

In most inspection situations the welding process is decided beforehand. So are the welding consumable (filler metals), but it is important that they have been stored properly in unopened containers unharmed by moisture.

To ensure uniform results the welders procedures must be spelled out in detail and followed rigorously during welding. Only qualified people must be assigned to the job. 119