As part of our portfolio of Non-Destructive Testing (NDT) services, NECIT Services provides Phased Array Ultrasonic Testing (PAUT). This highly flexible and accurate ultrasonic method is capable of detecting, sizing, and characterising internal discontinuities with exceptional precision. NECIT’s NDT operations are independently verified under our UKAS ISO/IEC 17020 accreditation, ensuring impartiality, technical competence, and consistent conformance with international standards.
Phased Array Ultrasonic Testing (PAUT) is a sophisticated ultrasonic testing method that utilises multi-element probes. Unlike conventional UT, which uses a single-element transducer with a fixed beam angle, PAUT employs multiple independently controlled elements to generate focused ultrasonic beams at variable angles. This allows operators to scan and inspect a component without physically moving the probe, increasing reliability and repeatability.
A major enhancement within PAUT is the Total Focusing Method (TFM), which uses Full Matrix Capture (FMC) data to focus the ultrasonic beam at every pixel in the inspection zone. This provides high resolution imaging of flaws, increasing sensitivity and detection confidence.
PAUT is carried out in accordance with several international standards, including:
PAUT allows for the rapid inspection of large areas in a single pass, significantly reducing inspection time and associated labour costs compared to traditional methods. These inspections generate permanent, auditable digital records which support traceability, quality assurance, and regulatory compliance. PAUT requires a higher initial investment in equipment and operator training, but these are offset by increased inspection speed, flexibility, and data quality.
PAUT offers significant technical and operational advantages over conventional UT, Radiographic Testing (RT), and surface methods such as MT (Magnetic Particle Testing) and PT (Penetrant Testing):
Probability of Detection (POD) is a statistical measure used to quantify the reliability of an NDT method in detecting flaws of a specific type and size. It represents the likelihood that a given defect will be detected under defined inspection conditions.
PAUT exhibits higher POD values compared to many conventional methods due to:
Independent studies and standards-based validation (e.g. ASTM E2862 and E2491) demonstrate that PAUT achieves >90% POD for many types of planar and volumetric defects in welds, particularly when performed under qualified procedures by competent operators.
PAUT can inspect hard-to-access or hazardous areas with reduced need for scaffolding or extensive access equipment, improving site safety and reducing costs. The high degree of automation and digital control in PAUT ensures repeatable, consistent results, which is especially valuable for periodic inspections and lifecycle asset management.
This makes PAUT especially valuable for safety critical applications in industries such as rail, power generation, pressure systems, oil and gas, and aerospace.
NECIT’s Phased Array Ultrasonic Testing services are led by a fully qualified in-house ISO 9712 Level III NDT specialist, who oversees all aspects of method validation, technique development, and compliance with international codes and client-specific requirements. We invest heavily in training and certification for PAUT operations, ensuring inspections are performed by highly competent personnel in line with the latest industry standards.
We also offer:
All equipment used in PAUT inspections is calibrated by UKAS ISO/IEC 17025 accredited laboratories, ensuring metrological traceability and compliance with customer specifications and regulatory frameworks.
For high integrity inspections backed by proven methodology, trusted qualifications, and UKAS accredited independence, NECIT Services Ltd is your partner of choice for Phased Array Ultrasonic Testing.
