Ultrasonic Thickness Testing

Ultrasonic Thickness Testing

Ultrasonic thickness testing (UTT) is a non-destructive method used to measure the thickness of materials by transmitting high-frequency sound waves through the test object. It is the most reliable technique for monitoring corrosion, erosion, and wall thinning.

Service Details

An ultrasonic thickness gauge generates a sound pulse that travels through the material and reflects back from the opposite surface (back wall). The time taken for the sound wave to travel through the material and return is measured. The gauge then calculates the thickness based on the known sound velocity of the material.

Ultrasonic thickness testing requires access to only one side of the material, making it ideal for in-service inspections of tanks, pipes, and pressure vessels.

Ultrasonic Thickness Testing Methods

• Single Echo Mode – Measures time between the initial pulse and the first back wall echo.

• Echo-to-Echo Mode – Measures time between two successive back wall echoes, ignoring surface coatings.

• Thru-Coating Mode – Eliminates errors caused by protective coatings.

• A-Scan Display – Shows the full waveform for verification of readings.

• B-Scan Display – Provides a cross-sectional profile of the test piece.

Applications

Ultrasonic thickness testing is used for:

• Corrosion and erosion monitoring in pipelines

• Wall thickness measurement of storage tanks and pressure vessels

• Boiler tube and heat exchanger inspection

• Ship hull and marine structure thickness assessment

• Quality control during manufacturing

Our Ultrasonic Thickness Testing Capabilities

Our facility is equipped with:

• High-precision ultrasonic thickness gauges with A-scan and B-scan

• High-temperature transducers for hot surfaces up to 500°C

• Small-diameter and dual-element transducers for rough or coated surfaces

• Thru-coating measurement capability

• Data logging and reporting software

We perform thickness testing on:

• Carbon steel and alloy steel

• Stainless steel

• Aluminum, copper, and brass

• Plastics and composites

All ultrasonic thickness testing is performed by ASNT Level 2 certified technicians following ASTM E797 and API 574 standards.

Contact Us

Phone: +91-9811159123

Email: info@mayankndtengg.com