Conventional NDT
Our conventional methods remain industry-proven for a reason: speed, reliability, and cost-effective insight into
material integrity and surface defects.
We deliver all core techniques with certified technicians, calibrated tools, and compliance to international codes
— whether on-site, offshore, or during critical shutdowns.
Services include:
- Ultrasonic Testing (UT): Wall thickness, lamination checks, corrosion profiling.
- Radiographic Testing (RT): Weld integrity and internal flaw detection using film or digital imaging.
- Magnetic Particle Inspection (MPI): Surface/sub-surface crack detection on ferromagnetic materials.
- Liquid Penetrant Testing (LPI): Surface-breaking flaw detection on non-porous materials.
- Visual Testing (VT): Manual and camera-assisted inspections by trained eyes with a checklist mindset.
Phased Array Ultrasonic Testing ( PAUT )
PAUT is an advanced ultrasonic technique using multiple transducer elements arranged in an array. Each emits timed pulses to create a focused, steered ultrasonic beam — enabling high-resolution scanning of complex geometries without moving the probe.
Ideal for oil & gas and aerospace, PAUT detects critical flaws like cracks, corrosion, and inclusions with precision.
Time of Flight Diffraction ( TOFD )
TOFD uses diffracted ultrasonic waves to accurately size internal flaws such as cracks. Highly sensitive and reliable, it’s often paired with PAUT to enhance defect sizing and depth measurement.
Tube Inspection (ECT - ECA - MFL - RFET - RFA - NFA - IRIS)
Critical for heat exchangers, boilers, condensers, and pipelines — tube inspection detects corrosion, cracks, wall thinning, blockages, and other issues threatening equipment life and plant reliability.
Methods We Use:
🔹 ECT (Eddy Current Testing): Surface & near-surface flaw detection.
🔹 ECA (Eddy Current Array): Enhanced mapping for detailed surface inspections.
🔹 MFL (Magnetic Flux Leakage): Detects wall loss and corrosion in ferromagnetic tubes.
🔹 RFET (Remote Field ET): Internal flaw detection using low-frequency fields.
🔹 RFA (Remote Field Array): Higher sensitivity with advanced sensor arrays.
🔹 NFA (Near Field Array): Ideal for corrosion near internal surfaces.
🔹 IRIS (Internal Rotary Inspection): Ultrasonic tool for precise wall thickness.
Together, these techniques allow us to adapt to various tube types and degradation modes — helping prevent failure, reduce downtime, and extend service life.
Magnetic Flux Leakage (MFL) -> Tank Floor Inspection
MFL tank floor mapping is a proven NDT method for detecting corrosion and metal loss in carbon steel tanks. The system uses magnets to saturate the tank floor with a magnetic field, detecting discontinuities by monitoring leakage signals.
- Modern MFL tools provide:
- Top and bottom defect discrimination
- Real-time signal acquisition
- Accurate defect sizing with reliable repeatability
This method is ideal for in-service storage tanks in petrochemical and power plants, helping teams plan maintenance, prioritize repairs, and improve asset reliability.
Note: MFL is best suited for ferromagnetic materials and may be supplemented with UT for depth confirmation or non-magnetic surfaces.
Remote Visual Inspection (RVI)
Remote Visual Inspection (RVI) uses specialized visual tools — such as video borescopes, cameras, and robotic crawlers — to inspect confined, hazardous, or hard-to-reach areas without disassembly. This method is essential for evaluating internal surfaces in piping, tanks, turbines, and engines where direct access is limited.
RVI enables visual confirmation of defects like corrosion, cracking, or foreign object intrusion. It's widely used in oil & gas, aerospace, and power generation to ensure safety and operational continuity during inspections without shutdowns.
Long Range Ultrasonic Testing (LRUT)
Long Range Ultrasonic Testing (LRUT), also known as Guided Wave Ultrasonic Testing, is a Non-Destructive Testing (NDT) technique used for inspecting long sections of pipelines or structures. It employs low-frequency guided ultrasonic waves that travel along the length of the material, detecting flaws such as corrosion, erosion, and cracks.
LRUT is highly efficient, capable of inspecting hundreds of meters of pipe from a single test point it can detect both internal and external flaws , even in challenging conditions like buried, insulated, or elevated pipelines. This method provides 100% coverage of the pipe wall, making it a cost-effective solution for industries like oil and gas, petrochemicals, and power generation.
Short Range Ultrasonic Testing (SRUT)
SRUT is a Non-Destructive Testing (NDT) method used to detect corrosion and material loss in hard-to-access areas — such as beneath pipe supports, tank floors, or localized insulation zones. It uses conventional ultrasonic pulse-echo techniques to scan short sections of pipe and detect wall thinning or pitting.
SRUT is particularly useful for screening corrosion under insulation (CUI) and other high-risk zones without requiring full disassembly. While it helps locate defects, it does not measure remaining wall thickness with high precision — it’s primarily used for risk-based screening.
Holiday Detector Test ( Spark Test )
The Holiday Test — also called a Spark Test or Pinhole Test — is a non-destructive method used to identify flaws in protective coatings, such as pinholes, cracks, or thin spots. It’s commonly applied to pipelines, tanks, and vessels with dielectric (non-conductive) coatings.
Using a high-voltage probe, the system detects breakdowns in the coating by identifying current leakage through exposed metal, indicating a defect. This helps prevent corrosion, leakage, and early coating failure.
Radiography Testing (RT)
Radiography Testing (RT) is one of the most established and reliable Non-Destructive Testing (NDT) methods. It uses X-ray or gamma radiation to penetrate materials and capture images that reveal hidden flaws such as cracks, porosity, lack of fusion, inclusions, and wall-thickness variations. RT delivers permanent image records for documentation and verification.
Key advantages:
- Detects both surface and internal flaws.
- Provides a permanent record of inspection (XRAY-films).
- Suitable for welds, castings, and complex structures.
- Effective even on thick materials.
Digital Radiography System (DRT)
Digital Radiography (DR) is the modern evolution of radiographic testing. Instead of film, it uses flat-panel digital detectors to instantly capture high-resolution X-ray images. This provides faster inspection, reduced radiation exposure, and easier data storage and sharing.
Key advantages:
- Instant image capture and analysis in the field.
- High-resolution, precise flaw detection.
- Faster inspection cycles compared to film.
- Digital archiving and easy reporting.