Group items tagged

Welding Variables: Amperage : controls fusion and penetration. Voltage : controls arc length. Travel speed :controls depth of penetration. Gas flow rate :protects weld from atmosphere. Electrode extension :affects penetration.

Below sample Liquid Penetrant Training Level I and II outline course for your reference before select right one:

A special dye is applied to the surface of the article to be tested. A suitable time interval allows it to soak into any surface defects. The surface is then freed from surplus dye and the dye in the crack revealed by either

Lack of fusion/penetration cause by : Too large an electrode for weld preparation. Incorrect angle of electrode for weld preparation. Current too low. Travel speed too high etc