Mock up recently created
The image shown is an example of a Tubular T-connection, part of a high-profile hospital 14-story Hospital Expansion Project
One of our Level III inspectors, Jamie Standley, encountered this connection and developed a UT TYK procedure, along with a mockup for UT personnel to demonstrate their skills.
“When examination of T-, Y-, and K-connections is to be performed, the operator shall be required to demonstrate an ability to apply the special techniques required for such an examination. Practical tests for this purpose shall be performed upon mock–up welds that represent the type of welds to be inspected, including a representative range of dihedral angle and thickness to be encountered in production, using the applicable qualified and approved procedures. Each mock–up shall contain natural or artificial discontinuities that yield UT indications above and below the reject criteria specified in the approved procedure. Performance shall be judged on the basis of the ability of the operator to determine the size and classification of each discontinuity with an accuracy required to accept or reject each weldment and accurately locate the unacceptable discontinuities along the weld and within the cross section of the weld. At least 70% of the unacceptable discontinuities shall be correctly identified as unacceptable.” This is also proof that the UT equipment and techniques proposed can actually work and find the flaws.
