Ultrasonic Testing (UT)
Ultrasonic Testing (UT)
Ultrasonic Testing (UT) is a powerful non-destructive testing method used to detect internal flaws, wall thickness variations, and material degradation in a wide range of components. At Assessfie, our ultrasonic inspections provide accurate, quantitative data on defects such as cracks, laminations, lack of fusion, inclusions, and corrosion. By combining certified inspectors, advanced ultrasonic equipment, and proven inspection procedures, we help ensure the integrity and reliability of safety-critical assets without causing damage or service disruption.
How Ultrasonic Testing Works
- A high-frequency ultrasonic sound wave is introduced into the test material using a transducer.
- The sound waves travel through the material and reflect back when they encounter defects or material boundaries.
- The returning signals are received and analyzed by the UT instrument.
- Trained UT inspectors interpret signal responses to determine defect size, depth, and location, and issue a detailed inspection report with recommendations.
Technologies We Use
- Conventional Ultrasonic Testing (A-scan, B-scan, C-scan)
- Straight Beam Ultrasonic Testing
- Angle Beam Ultrasonic Testing
- Thickness Measurement & Corrosion Mapping
- Manual and Semi-Automated UT Systems
- Portable UT equipment for field and offshore inspections
Ultrasonic Testing Applications in the Oil & Gas Industry
Ultrasonic Testing is widely used across upstream, midstream, and downstream operations due to its accuracy and ability to provide quantitative results. Key applications include:
Pipeline Integrity — Wall thickness measurement, corrosion mapping, and weld inspection
Pressure Vessels & Storage Tanks — Shells, heads, nozzles, and weld joint inspections
Heat Exchangers & Boilers — Tube wall thickness measurement and defect detection
Structural Steel & Fabrication — Detection of internal flaws in plates, beams, and welds
Valves, Flanges & Forgings — Internal discontinuity detection in critical components
Offshore & Marine Structures — Weld inspection in jackets, risers, and load-bearing members
In-Service Inspection — Monitoring corrosion and erosion without interrupting operations
Weld Quality & Repair Verification — Confirmation of weld integrity before and after repairs
Standards & Regulations
Our Ultrasonic Testing services comply with internationally recognized standards, ensuring inspection reliability, repeatability, and global acceptance.
International Standards
- ISO 16810 — General principles of ultrasonic testing
- ISO 17640 — Ultrasonic testing of welds
- ISO 11666 — Acceptance levels for ultrasonic testing of welds
- ISO 23279 — Characterization of weld discontinuities
ASTM Standards
- ASTM E164 — Standard practice for ultrasonic examination
- ASTM E317 — Evaluation of ultrasonic transducers and systems
- ASTM A388 — Ultrasonic examination of steel forgings
- ASTM E213 — Ultrasonic testing of metal pipe and tubing
Industry-Specific Standards
- API 1104 — Welding and inspection of pipelines
- API 570 — In-service piping inspection
- API 650 — Weld inspection for storage tanks
- ASME Section V — NDT requirements for pressure equipment
Personnel Qualification Standard
- SNT-TC-1A — Qualification and certification of NDT personnel
