Incompletely Filled Groove - Underfill

This is a continuous, or intermittent, channel in the surface of a weld, running along its length, due to insufficient weld metal. Comm...

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Overlap (Cold Lap)

This is an imperfection at a toe or root of a weld caused by metal flowing on to the surface of the parent metal without fusing to it. It m...

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Slag inclusions

The characteristic features and principal causes of slag imperfections are described Identification Slag is normally seen as elongated li...

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Lack of sidewall and inter-run fusion

Demagnetising a pipe This article describes the characteristic features and principal causes of lack of sidewall and inter-run fusion. ...

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Incomplete root fusion or penetration

Identification Incomplete root fusion is when the weld fails to fuse one side of the joint in the root. Incomplete root penetration occu...

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