Using non-destructive testing for weld verification

Regular weld testing is essential for the continued operation of industries. Inevitably, all welds experience fatigue and wear over their lifetime. Weld testing catches flaws before problems can arise. For most industries, weld failure would lead to costly repairs and put others at risk. Welds are tested by Magnum NDT using non-destructive testing methods such as ultrasonic testing, radiography, magnetic particle inspection, and liquid penetrant testing.



1. Porosity

Porosity: Gas trapped by solidified weld metal before the gas can rise to the surface and escape the weld metal. Creating a void in the material.

The radiographic image shows circular spots darker than the surrounding area because they will have a higher radiographic density. (Individual, scattered and wormhole) Gas trapped by solidified weld metal before the gas can rise to the surface and escape the weld metal. Creating a void in the material.

2. Slag Inclusions

Slag Inclusions: Nonmetallic material entrapped in weld metal or between weld and base metal.

The radiographic image shows dark jagged asymmetrical shapes within the weld or along the weld joint. Nonmetallic material entrapped in weld metal or between weld and base metal.

3. Cracks

Cracks: Cracks can only be detected when they have spread in a direction that produces a change in the weld thickness that is parallel to the x-ray beam.

The radiographic image shows indications that appear as jagged and often very faint irregular lines Cracks can only be detected when they have spread in a direction that produces a change in the weld thickness that is parallel to the x-ray beam.

4. Incomplete Penetration

Incomplete Penetration or Lack of Penetration: Incomplete filling of the weld root when the weld metal fails to penetrate the joint. High vulnerability to cracking.

The radiographic shows a dark area with well-defined, straight edges that follow the root face down the center of the weld Incomplete filling of the weld root when the weld metal fails to penetrate the joint. High vulnerability to cracking.

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Whatever the flaw may be, Magnum NDT's technicians have you covered. Contact us today to schedule a free consultation about our NDT services.