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UTT

UTT — Ultrasonic Thickness Testing

A non-destructive testing method that uses ultrasonic measurements to determine the wall thickness of materials and components.

Definition

Ultrasonic Thickness Testing (UTT) is a non-destructive testing (NDT) technique that uses high-frequency ultrasonic sound waves to accurately measure the thickness of materials without requiring access to both sides of the component. UTT is widely used to monitor corrosion, erosion and other degradation mechanisms affecting pressure equipment, piping and structural components throughout their operational life.

Why It Matters

Ultrasonic Thickness Testing provides accurate wall thickness measurements to support asset integrity management and corrosion monitoring.

In Practice

Ultrasonic Thickness Testing is one of the most widely used inspection techniques for integrity management and is commonly performed at designated Thickness Measurement Locations to support corrosion monitoring, Remaining Life assessments and Risk-Based Inspection programs.

Common Misuse

Ultrasonic Thickness Testing is a specific application of Ultrasonic Testing used to measure wall thickness, whereas Ultrasonic Testing encompasses a broader range of inspection techniques including flaw detection and weld examination.

Term Details
Synonyms:
UTT; Ultrasonic Thickness Testing; Ultrasonic Thickness Measurement; Thickness Gauging
Classification:
Inspection & NDT
Methodology
Intermediate
Applications

Non-Destructive Testing; Asset Integrity; Inspection.

Where It's Used

Oil and gas.; Petrochemical.; Pipelines.; Power generation.; Manufacturing.

References

ASME BPVC Section V Article 5; API 570

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