Gammax Independent Inspection Services Ltd non destructive testing
Gammax UK Radiography  
Gammax UK Magnetic Particle Inspection, Ultrasonic Testing, Liquid Penetrant Inspection, Penetrant and PMI,
LPI
Liquid Penetrant Inspection
LPI

Used mainly on stainless steels. It uses the principal of capillary action in order to draw a coloured dye into a crack type defect.

 

Once the dye has had time to enter the defect, usually between 10-20 minutes the surplus dye is removed by a clean lint free cloth and the remaining dye removed using a solvent moistened cloth.

 

A chalk like spray developer is applied to the object and any defects present are shown by the appearance of a red line appearing.

 

There are several methods of using liqiud penetrants including fluorescents.The most common method is red visible,solvent removable.

LPI LPI LPI
LPI LPI