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Ultrasonic A-Scan Thickness Measurement - Level  II

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Course Duration:     3 Days (24 Hours)  
Objective:
Ultrasonic A-Scan Thickness Measurement - Level II, Classroom NDT training course is developed to meet the requirements of ASNT SNT-TC-1A, CP -189 and other equivalent standards and customer specific written practice for training and certification in this method of Non-Destructive Testing personnel.
After completion of Ultrasonic A-Scan Thickness Measurement testing level II course, you will get in-depth knowledge of Ultrasonic Testing principles, sound waves, and attenuation of sound, transducers, equipment and application of Ultrasonic Testing techniques to test various product forms.
Training Examination & Certification Requirement:
During this Ultrasonic A-Scan Thickness Measurement classes, you will give examination in General theory, Specification, and Practical. You are required to successfully pass these three examinations with minimum of 70% grading in each examination and average grading of all three examinations should be 80% minimum as per the requirement of ASNT SNT-TC-1A 2011.
OJT Hours: As per requirements of ASNT SNT-TC-1A, you need to have a minimum of 175 Hours on-job training (OJT) after completion of training classes for certification in this method.

Basic Principle of Ultrasonic A-Scan Thickness Measurement Testing
In the ultrasonic testing method, high-frequency sound waves transmitted into a material to detect the imperfections or to locate changes in material properties. The most commonly used ultrasonic testing technique is pulse echo, wherein sound is introduced into a test object and reflections (echoes) are returned to a receiver from internal imperfections or from the part's geometrical surfaces.
Course Description:

  • Wave modes
  • Wave interaction & Interference  
  • Piezoelectric Transducer   UT-BScan
  • Ultrasonic Pulsar and Receiver  
  • Attenuation of sound
  • Major Variables in Ultrasonic Testing
  • Test Blocks and Instrument Calibration
  • Straight Beam Testing
  • Code and Standard

Hands on Training (Practical) Outlines:

  • Range Calibration
  • Resolution Check
  • Dead Zone Check
  • Velocity Comparison
  • Attenuation Check
  • Corrosion Mapping
  • Lamination Check
  • Flaw Sizing
  • Flaw Interpretation and Evaluation

Training Material:

Training Course material is supplied at the start of training and divided into different sections followed by practice worksheets and quizzes. Training books also include some referencing code & specifications for examination procedure and for acceptance.

Referencing Code and Standards:

 

  • ASTM E 0797 – Measuring Thickness by Manual Ultrasonic Pulse - Echo Contact Method
  • ASTM SA 435 – Straight-Beam Examination of steel plate.