ASNT NDT Level III case studies

ASNT NDT Level III · Put your knowledge to work in context.

The ASNT NDT Level III credential is the advanced certification tier in the American Society for Nondestructive Testing's personnel certification structure. Where Levels I and II focus on performing and interpreting a specific test method, Level III is built around the broader technical and managerial responsibilities that sit above the method itself: choosing methods and techniques for a given product form and discontinuity type, writing and validating procedures, interpreting codes, standards and specifications, setting acceptance criteria, and training, qualifying and certifying other personnel. The ASNT NDT Level III case studies are 5 cases and about 4,872 words.

The 100 mm Cr-Mo Shell: Two Radiographers, Two Answers

A fabricator finishes longitudinal SAW seams in a 100 mm (4 in.) thick 2¼Cr-1Mo (SA-387 Gr.22 Cl.2, P-No. 5A) hydrocracker shell.

947 words, about 5 min 2

Austenitic Girth Welds: UT Substituted for RT

An EPC contractor directs that girth welds in a 304L stainless line (323.9 mm OD × 12.7 mm wall) be examined by manual UT instead of RT; the line is congested and radiography would need a night shift and a 30 m exclusion zone. The Level II uses a 5 MHz, 70°, 6 mm single-crystal shear-wave probe and builds a DAC from a carbon steel block with a 1.5 mm side-drilled hole.

913 words, about 5 min 3

Which Document Governs? Precedence, Coverage and Digital Radiography

A shop builds a 25 mm SA-516 Gr.70 vessel to ASME Section VIII Div. The purchase order carries an order-of-precedence clause: PO, then owner specification NDT-100 Rev.

998 words, about 5 min 4

Sour Service Girth Weld: ECA Versus Cut-Out

A 323.9 mm OD × 9.5 mm wall API 5L X52 gas line is designated sour by the owner (H₂S partial pressure 4.5 kPa), so ISO 15156 applies. Automated PAUT on one girth weld reports a 20 mm long, 3 mm through-wall indication at the fusion line at 6 o'clock, characterised as lack of fusion - 32% of the wall.

937 words, about 5 min 5

The ASNT Level III Certificate and the Nuclear Job

Your written practice is written to SNT-TC-1A (2020). A new hire presents an ASNT NDT Level III certificate in UT (current), a previous employer's Level II certificates in MT and PT, six years of UT experience on pressure vessels, and a vision record dated 14 months ago: Jaeger 2 at 12 in., Ishihara 14-plate with 12 correct.

1,077 words, about 5 min