TOFD

Standards & Compliance

• Inspection methodologies aligned with ASME BPVC Section V Article 4 Mandatory Appendix III
• TOFD inspection practices in accordance with ISO 10863
• Compliance with applicable API inspection requirements
• Validated encoded ultrasonic inspection procedures
• Code-compliant reporting and digital inspection records

Inspection Methodology

• Highly accurate detection and sizing of weld discontinuities
• Inspection of pipelines, pressure vessels, and structural welds
• Advanced diffraction-based ultrasonic evaluation techniques
• Applicable during fabrication, shutdown, and in-service inspections
• Support for critical integrity assessment and fitness-for-service evaluations

Calibration & System Validation

A key aspect of our methodology is calibration and validation of system performance prior to inspection activities. This ensures reliable flaw detection sensitivity, accurate depth sizing, and repeatable encoded inspection performance under actual field conditions.

• TOFD calibration blocks with side-drilled holes (SDH)
• Backwall and lateral wave calibration references
• Encoder-based scan calibration and position verification tools
• Verification of time base (range), velocity, and probe center separation (PCS)
• Validation of lateral wave and backwall signal performance
• Establishment of accurate depth sizing through diffraction signals
• Verification of system resolution and flaw detection sensitivity

TOFD Applications

• Inspection of butt welds in pipelines and pressure vessels
• Detection of cracks, lack of fusion, and incomplete penetration
• Accurate through-wall sizing of planar defects
• Inspection of structural welds and critical fabrication joints
• Suitable for both new fabrication and in-service inspections

Inspection Controls & Best Practices

• Proper selection of probe frequency, wedge configuration, and PCS
• Development of optimized scan plans for complete weld coverage
• Use of encoded scanning systems for precise position tracking
• Interpretation of A-scan and D-scan imaging data
• Integration with PAUT or conventional UT for comprehensive inspection coverage
• Verification of signal quality, scanning speed, and data integrity

Industry Applications

• Oil & Gas and Petrochemical Facilities
• Power Generation and Process Industries
• Pressure Vessels, Pipelines, and Storage Tanks
• Marine and Offshore Structures
• Fabrication, Infrastructure, and Heavy Engineering Projects

Why Choose AIE?

By integrating advanced TOFD technologies with robust calibration and validation practices, AIE delivers highly accurate, repeatable, and code-compliant inspection solutions. Our methodology significantly improves defect detection capability, enhances sizing accuracy, and supports long-term asset integrity and operational reliability.