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Hybrid Valve Inspection Technology (HVIT)


INTRODUCTION
PASSING / LEAK DETECTION
Inspection Approach
Valve Leakage Inspection using acoustic emission
Valve Body Stress Inspection using Metal Magnetic Memory Technology
EVALUATION OF METAL LIMITING STATE
  • The structure Born Noise is developed due to movement of the product. It is the rapid release of energy from a mateiral under stress.
  • AE may be generated by propagating Cracks, Active Corrosion % Turbulent Flow.
  • The system detects the leak "hiss" caused by turbulent flow, which is measured in dB (AE)
STRESS DETECTION
  • Points (+) show the points of conventional NDT using UT, hardness measurement, ET. The points (+) have been inspected for Stress Concentration Zones detected by MMM.
  • MMM inspects circumferentially for 100% coverage area to cover all the potential defects
  • Based on MMM,cracks were detected in between the inspection points of NDT.
MMM technology is used to assess the stress condition in determine the weak area in material based on established correlation between accumulated stress-strain state that has been experienced by ferrous/ paramagnetic material with the uniformity of natural magnetic fields distribution.
VALVE INTEGRITY ASSESSMENT SYSTEM
STAGE 1 Desktop Review
STAGE 2 PASSING / LEAKING DETECTION STRESS DETECTION
STAGE 3 EVALUATION OF LOSSES Evaluation of metal limiting state in accordance ISO 24497:2007 and damage mechanism utilizing flaw detection
STAGE 4 INTEGRITY EVALUATION
Prior to taking any inspection work, desktop review is a crucial process in understanding the process and design mechanism which can assist the team in establishing the potential damage mechanism before conduction the inspection work.
STRESS DETECTION
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