PCN NDT Ultrasonic Testing Level 2 Exam case studies
PCN NDT Ultrasonic Testing Level 2 Exam · Put your knowledge to work in context.
The PCN NDT Ultrasonic Testing Level 2 credential is issued under the PCN certification framework administered by The British Institute of Non-Destructive Testing (BINDT), whose registered office is Midsummer House, Riverside Way, Bedford Road, Northampton NN1 5NX, UK. PCN is a personnel certification scheme: a Level 2 certificate attests that the holder has been examined and found competent to perform ultrasonic testing to the standard required by the certification scheme, and it is used by inspectors, technicians and supervisors working in manufacturing, construction, pressure equipment, aerospace and in-service inspection who need third-party evidence of competence. The PCN NDT Ultrasonic Testing Level 2 Exam case studies are 5 cases and about 2,243 words.
1Transfer correction on a thick ferritic nozzle weld
A 60 mm thick ferritic steel nozzle-to-shell weld is to be examined from the shell surface with 2 MHz, 45° shear-wave probes. The written procedure requires a DAC from 2 mm side-drilled holes in a 25 mm thick reference block.
503 words, about 3 min2High-frequency shear wave on an austenitic pipe weld
A 316L austenitic stainless steel pipe butt weld, 88.9 mm outside diameter and 7.62 mm wall, is examined 24 hours after welding. The procedure uses a 5 MHz, 70° shear-wave probe on a curved shoe and a 2 mm side-drilled-hole DAC.
450 words, about 2 min3Calibration drift during a plate-weld scan
During a site inspection of a 25 mm thick carbon steel plate butt weld, you use a 4 MHz, 60° shear-wave probe and a DAC made from 3 mm side-drilled holes. The procedure requires a sensitivity check before and after each 4-hour scan period.
416 words, about 2 min4Backwall loss in a forged shaft
A 42CrMo4 forged shaft, 300 mm diameter and 500 mm long, is examined from the cylindrical surface with a 2 MHz, 20 mm diameter straight-beam probe. In a clean area the backwall echo is 80% FSH.
432 words, about 2 min5Root response in a thin-wall stainless tube weld
A 25.4 mm outside diameter, 2.77 mm wall 304 stainless steel tube butt weld is examined with a 5 MHz, 70° shear-wave probe with a 6 mm element and a curved shoe. The internal root bead is visible and the cap is ground flush.
442 words, about 2 min