Monday 20 February 2017

Q:- Why is it essential to clean the surrounding parent metal adjacent to the weld metal made by MMA(SMAW)which is to be ultrasonically tested?


  1. Sound waves will not travel though paint 
  2. Remove any rust 
  3. The spatter will impede the contact of the probe and the parent material surface 
  4. Spatter will reflect the back will echo signal and give spurious indications 

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