|Principles||Automated ultrasonic scanners map out and record the size and shape of corrosion and flaws.|
|How and where is it used?||Can be deployed via robotic vehicle, tethered crawlers or specialized track systems to permit inspection in difficult to access, high temperature or unusually shaped areas. Permits testing while the inspected vessel remains in operational service.|
Wide variety of in-service and construction/fabrication applications, including weld inspection, boiler tube inspection and flaw sizing.
Petrochemical, pipeline, power, fabrication and pulp & paper industries
|AUT has been used in lieu of radiography for Code work|
|Form of report or deliverable?||C-Scan report mapping wall thickness and position|
Provides ease of comparison over time
|Advantages||High penetrating power|
Fast speed of test with 100% coverage over large areas
High temperature tolerance (used at temperatures up to 700 degrees F)
Automatic deployment mechanism improves test results due to a consistent pressure on the transducer, with steady motion and uniform coverage.
Advances in equipment technology and reporting capability have resulted in cost savings.
|Limitations||Advanced technician knowledge required for development of procedures|
Surface must be prepared by cleaning and removal of loose scale
Couplant required to provide transfer of ultrasonic wave energy
Rough, irregular parts are hard to inspect
|Certifications of technicians performing the work?|
|Rope access applicable?|