Radiographic testing (RT) (x-ray) is a method of non-destructive examination (NDE) used to check the integrity of welds.  It is utilized when:

  • It is a design requirement
  • Specified by customer
  • Placement of a fitting is close to another weld
  • Other methods of NDE cannot be used
  • Required by ASME code for new tanks or modification/repairs of existing ASME tanks
  • May be used during ASME welder qualification testing

Certain conditions will exclude x-ray for NDE:

  • Unable to obtain a clear image of the weld
  • Safety (from radiation) of the people working nearby
  • Prohibited by certain weld processes.

RT examines the welds for internal material defects. It is most often used to assess the quality of butt joints, circumferential and longitudinal weld joints. X-ray is rarely selected to examine the attachment welds of fittings and other appurtenances.

The image below shows a spot x-ray of a 6” section of weld (from point A to B). It shows the weld is good with no pits or holes. The labeling corresponds with the weld map, identifying where on the tank the shot was taken.

Learn more about our quality program here: https://www.stainlessfab.com/quality-control.html

X-ray of a 6-inch section of weld

<< Back to our blogs