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DACON INSPECTION SERVICES ADVANCE ADVANCE ULTRASONIC INSPECTION ULTRASONIC INSPECTION C-SCAN Who we are Conventional and Oil and Gas, Refinery, Over 400 personnel Thailand headquarters Advanced NDT and Petrochemical, Heavy including more than with International Inspection Services Industry, Mining 300 inspectors expertise since 1979 Operational Excellence - Our Customers DACON INSPECTION SERVICES FOR ALL YOUR INSPECTION NEEDS Advanced Ultrasonic Inspection Corrosion Mapping • Also called See-scan or C-scan • The C-scan presentation is typical for this technique. A color graphic image of the object’s thickness is made, representing the nominal thickness in a certain color and wall thinning or erosion/corrosion in other colors • Ultrasonic data is normally gathered with a straight beam ultrasonic probe • Information of the probe position is gathered together with the ultrasonic data and is processed by a computer, which generates the C-scan image DACON INSPECTION SERVICES FOR ALL YOUR INSPECTION NEEDS Advanced Ultrasonic Inspection Corrosion Mapping Probe position can be determined in several ways (depending on system used): Semi automated: • Camera system that tracks a light emitting diode on the probe • Acoustic system that tracks a sound emitter on the probe • System where the probe position is determined with a wire connected to the probe The semi automated systems may be less accurate but can also be used on difficult shapes like elbows etc. DACON INSPECTION SERVICES FOR ALL YOUR INSPECTION NEEDS Advanced Ultrasonic Inspection Corrosion Mapping Probe position can be determined in several ways: Fully Automated: • Wheel encoders on mechanical scanners DACON INSPECTION SERVICES FOR ALL YOUR INSPECTION NEEDS Advanced Ultrasonic Inspection Corrosion Mapping Example C-scan of a corroded area Under the C-scan there is a B-scan presentation which shows the cross section of the component DACON INSPECTION SERVICES FOR ALL YOUR INSPECTION NEEDS Advanced Ultrasonic Inspection Corrosion Mapping Advantages & Disadvantages Advantages • Gives information about defect Geometry • Gives a permanent record • Easy analysis of big amounts of data DACON INSPECTION SERVICES Disadvantages • For semi automated systems, readings often have a low accuracy • Paint compensation may be difficult and therefore paint may need to be removed FOR ALL YOUR INSPECTION NEEDS How Can We Help? Contact Tim Shaw Chief Marketing Officer Email : [email protected] Mobile Phone : +66 (0) 89 245 9966 www.dacon-inspection.com DACON INSPECTION SERVICES FOR ALL YOUR INSPECTION NEEDS
