ASNT NDT Level III PT case studies
ASNT NDT Level III PT · Put your knowledge to work in context.
The ASNT NDT Level III - Penetrant Testing (PT) credential is a professional certification for experienced penetrant testing personnel. It is intended for individuals who already understand penetrant testing mechanics and who want to demonstrate the broader competence expected of a Level III: method selection, technique and materials control, procedure and technique development, interpretation and evaluation of indications, and the management responsibilities that accompany Level III status, such as personnel qualification and certification oversight within an employer's written practice. The ASNT NDT Level III PT case studies are 5 cases and about 2,670 words.
1Fluorescent Penetrant Sensitivity Drift During Extended Dwell
A Level III is auditing a fluorescent penetrant line used for aerospace forgings. The line uses a Level 3 sensitivity fluorescent penetrant (per AMS 2644) with a 10-minute dwell, followed by a 30-second water spray rinse at 20 psi, then a 5-minute hydrophilic emulsifier dip (20% concentration), a 2-minute rinse, and a 5-minute oven dry at 70°C.
510 words, about 3 min2Developer Application Consistency on Complex Geometries
A Level III is evaluating a penetrant testing process for a set of cast aluminum impellers with intricate internal cooling passages. The specified developer is a nonaqueous wet developer (suspension) applied by spraying.
492 words, about 2 min3Procedure Qualification for a New Alloy and Geometry
A Level III is tasked with qualifying a penetrant testing procedure for a new type of nickel-based superalloy turbine blade with a complex internal cooling circuit and a thermal barrier coating (TBC) on the external surface. The existing procedure was written for stainless steel blades without TBC and uses a post-emulsifiable penetrant with a lipophilic emulsifier.
599 words, about 3 min4Evaluating a Linear Indication in a Critical Weld
A Level III is reviewing a penetrant inspection report for a critical weld on a pressure vessel. The weld is a circumferential seam in a 50-mm-thick stainless steel vessel, and the penetrant testing was performed per ASME Section VIII, Division 1, using a solvent-removable penetrant (Method C) with a visible dye.
518 words, about 3 min5Qualification of a Level II Inspector for a New Technique
A Level III is responsible for the NDT qualification and certification program at a fabrication facility. The facility is expanding its penetrant testing capabilities to include fluorescent penetrant testing (Method A) for aerospace components, which they have not previously performed.
551 words, about 3 min