NDT Level III and auditor

Hi everyone, I am Naveed possessing ASNT NDT Level III (MT, PT, RT, UT) and ISO 17020 auditor based in Pakistan. I would be loving to share ideas and experiences in the field NDT and related fields. 

3 Replies

  • I have some UT questions I could use some help with. I test structural steel to D1.1 using conventional UT. Occasionally I'll have a flaw show up inside the weld according to the depth and surface readings due to the surface of the weld being less than smooth. I've contoured these welds with a grinder myself and rescanned the area and it's clean. Can you explain how/why this happens? Is there any way to eliminate the weld as the location of what I'm picking up without grinding the weld?
  • In reply to Justin Mixon:

    OK, if there is in-even welding, there would be chances for the sound waves to bounce. Since the depth shows the surface reflection. Finger damping would be the advantageous in this case. Don't remove the weld cap with out the consents of welding inspector.
  • In reply to Justin Mixon:

    I agree with an earlier thought of using finger damping to eliminate some signals. I have inspected thousands of full pen welds with AWS/UT and I found that plotting the sound path helped me recognize what was relevant or not. Try plotting your scan with the angles and plate thicknesses you're using and then you'll know where these non-relevant signals should pop up while scanning. Keep on scanning.
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