Ultrasonic Thickness Gauging (UT TKY) is a highly reliable and non-destructive testing (NDT) method used to evaluate the wall thickness of materials, helping to detect internal degradation caused by corrosion, erosion, or manufacturing defects. This technique is essential for maintaining asset integrity, extending service life, and ensuring safety in industrial environments.
UT gauging enables accurate wall thickness measurements of in-service components to assess corrosion rates over time. This helps in:
Preventing unexpected failures
Planning maintenance schedules
Extending the lifespan of equipment
Supporting RBI (Risk-Based Inspections) Stratergies
Used on metals, plastics, composites, and ceramics, UT provides precise single-point or grid-based thickness measurements:
Ideal for pressure vessels, storage tanks, pipelines, and structural components
Capable of measuring through coatings (with echo-to-echo technique)
Thickness gauging supports weld inspection by:
Verifying weld reinforcement profiles
Checking for undercut, root erosion, or internal corrosion
Complementing full weld UT or radiography
While primarily used for thickness measurement, UT can detect flaws such as:
Localized thinning
Pitting
Mid-wall anomalies
Cracks and inclusions (if present along measurement path)
UT TKY is crucial for inspecting D Category welds and joints as per ASME & other global codes:
Ensures compliance with pressure vessel integrity standards
Avoids costly repairs by early detection of thickness loss or defects
Lamination can compromise material integrity, especially before fabrication or during pipeline inspection:
UT detects delaminations, inclusions, or trapped gases.
Critical for pipeline integrity, shipbuilding, and structural steel
UT gauging assesses thickness consistency and flaw-free surfaces in:
Complex cast components
High-stress forgings
Helps qualify components for high-pressure or structural use
Modern UT devices offer:
Digital readouts and B-scan imaging
Cloud-based data capture and comparison over time
Integration with asset management platforms
Improved traceability and trending for corrosion mapping
All inspections are conducted as per industry codes (ASME, API, ISO, etc.) and client-specific standards:
Certified inspectors
Standardized reporting formats (PDF, Excel, CAD overlays)
Reports include location maps, thickness trends, and anomaly flags
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