ASNT NDT III UT case studies
ASNT NDT III UT · Put your knowledge to work in context.
The ASNT NDT Level III Ultrasonic Testing (UT) credential is a professional certification offered by the American Society for Nondestructive Testing, the society describes as "global leaders in nondestructive testing (NDT)" whose certifications validate "NDT professionals' competency." Level III is the highest of the three NDT levels and is aimed at experienced UT practitioners who develop, qualify, and administer test techniques and procedures, interpret codes and specifications, evaluate and report results, and take responsibility for the UT method within an employer's written practice. This page is an independent study resource and is not affiliated with, endorsed by, or sponsored by ASNT. The ASNT NDT III UT case studies are 6 cases and about 2,842 words.
1Contact Shear-Wave Screening of a Nozzle Weld with a Curved Surface
A Level III is asked to qualify a contact shear-wave technique for a 25 mm thick carbon steel nozzle-to-shell weld. The nozzle OD is 168 mm and the accessible surface is the curved shell side, not the nozzle bore.
637 words, about 3 min2System Performance Drift on a Calibration Block After Probe Change
A UT system is set up on a 1018 steel calibration block with 1.5 mm side-drilled holes at 10, 20, 30, and 40 mm depth. The instrument is a digital flaw detector with a 5 MHz, 12.7 mm diameter contact transducer and a 0-degree wedge.
509 words, about 3 min3Writing a Procedure for a Thick-Section Weld with Limited Access
A Level III must write a UT procedure for a 60 mm thick low-alloy steel weld in a pressure vessel. Access is limited to one side, and the weld cap is ground flush on that side only.
504 words, about 3 min4Evaluating an Indication at a Weld Root with Ambiguous Echo Dynamics
A Level II is inspecting a 20 mm thick carbon steel butt weld. At the root region, a signal appears at 22 mm sound path with a 45-degree probe.
436 words, about 2 min5Qualification Records and Code Conflict for a Level II Inspector
A Level II inspector holds a certification from a national scheme that recognizes UT Level II for welds. The project specification invokes a code that requires certification to a different scheme and also requires a specific practical examination on the project's reference blocks.
406 words, about 2 min6Training Plan for a Technician Transitioning from Radiography to UT
A technician with five years of radiography experience is being transitioned to UT. The employer's written practice requires a minimum of 40 hours of training and a practical examination before certification at Level II.
350 words, about 2 min