| Visual Inspection | |
| The check is based
on test welding. The test welding have to be repeated with the values that
are adjusted later on. For the simplified shop test there are two possible procedures: • visual inspection • impact bending test A purely visual inspection is only permitted if you have weld joints which are not subject to increased pressure. |
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Good welding The weld fillet is accurate, even and closed.With St 37 (mild steel) the surface is smooth and shining blue. |
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Dipmeasure or welding current too low, lift too small The weld fillet is flat or incomplete.The tip of the stud is only just melted on. |
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Welding time too long or welding current too high The weld fillet is flat and inaccurate. There are splashes around
the |
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Welding time too short or welding current too low The weld fillet is flat, uneven, shows hardly any visible pores and is dull. |
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Blowing action The weld fillet is one-sided and not closed. |
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Stud hang-up Heavy undercut or contraction in the welding area. |
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