Radiographic detection of crack-like defects in thick sections
The detection of crack-like flaws during in-service inspection of thick-wall piping systems is usually assigned to ultrasonic testing (UT). However, there are circumstances where UT may prove difficult or currently inapplicable. Inspection of centrifugally cast austenitic piping or bimetallic weldments are cases in point. In such circumstances, radiographic testing (RT) warrants consideration. Conventional field RT methods, based largely on isotopic sources, may be inherently limited in sensitivity to crack-like flaws for thick section applications. However, such proscriptions are often eliminated by linear accelerators (linacs), and the availability of MINAC (miniature linear accelerator) as a field-portable linac facilitates RT applications. This paper provides a summary of experience and applications of MINAC usage for crack-like flaw detection, including field usage. Data permitting the assessment of alternate RT methods are also provided.
- Research Organization:
- Electric Power Research Inst.
- OSTI ID:
- 6402254
- Journal Information:
- Mater. Eval.; (United States), Journal Name: Mater. Eval.; (United States) Vol. 42:6; ISSN MAEVA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420205* -- Engineering-- Transport & Storage Facilities-- (1980-)
ACCELERATORS
ALLOYS
AUSTENITIC STEELS
CASTING
CRACK PROPAGATION
CRACKS
DIMENSIONS
EQUIPMENT
FABRICATION
IN-SERVICE INSPECTION
INDUSTRIAL RADIOGRAPHY
INSPECTION
IRON ALLOYS
IRON BASE ALLOYS
LEAK DETECTORS
LEAK TESTING
LINEAR ACCELERATORS
MINNESOTA UNIV LINAC
PERFORMANCE
PIPELINES
PORTABLE EQUIPMENT
STEELS
TESTING
THICKNESS