Non-Destructive Testing Advanced NDT Techniques

Magnetic-Flux Leakage (MFL) & Surface Topology Air-Gap Reluctance Sensors (STARS) – Our floor map tank inspection system combines MFL and STARS for completing top and bottom plate corrosion views. MFL & STARS offer the following advantages:

  • Speed: The inspection system is capable of 1 m/s (3.2 ft/s) floor mapping
  • Customization: Advanced defect sizing and classification tools
  • Flexibility: Full tank floor mapping, free-scan and stop-on-defect
  • Data Output: Auditable inspection data & full data recording with inspection confidence
  • Precision & Quality: High Probability of Detection (POD)
  • Ruggedness: Field-tested durability and reliability

Long Range Ultrasonic Testing (LRUT): Alhoty’s LRUT advanced technology detects and analyzes corrosion in difficult or limited access locations.  LRUT offers the following advantages:

  • Affordability: Low-cost screening with 100% coverage even for clamped, insulated, elevated, sleeved or buried pipes
  • Targeted Testing: Evaluate corrosion distribution around the pipe circumference
  • Flexibility: Test ranges beyond 60 meters from a single location for pipes up to 48” diameter
  • Ruggedness: Test service piping up to 125 °C
  • Precision & Quality: Detection of metal loss > 3%

Phased Array Ultrasonic Testing (PAUT) – Alhoty’s phased array system utilizes a specialized ultrasonic transducer that pulses multiple elements in a programmed sequence to identify defects.  PAUT offers the following advantages:

  • Flexibility: Applicable for various shapes and geometries and can be used in a contact mode, or immersion testing
  • Safety: No Radiation or X-rays
  • Precision & Quality: High Probability of Detection (POD), Flaw Characterization, and Depth Determination
  • Data Outputs: Real-time recordable results

Time of Flight Diffraction (ToFD) – This is an advanced technique of ultrasonic inspection incorporates existing UT methods for precisely detecting crack tips through diffraction. ToFD offers the following advantages:

  • Affordability: Simplified configuration (single pulsar and receiver) with conventional probes
  • Flexibility: Indifferent to weld bevel angles and flaw orientation, applicable to irregularly shaped areas
  • Precision & Quality: High sensitivity to precisely detect all weld flaw sizes and types
  • Speed: Large coverage area with minimal equipment, rapid scanning options
  • Data Output: Complete imaging and full data recording

Alhoty offers four options for tube testing (ECT, MFL, IRIS & RFT):

  • Eddy Current Testing (ECT): A non-contact technique suitable for inspecting non-ferromagnetic tubing. ECT detects and sizes metal discontinuities caused by corrosion, erosion, wear, pitting, baffle cuts, wall loss, and cracks
  • Ultrasonic Internal Rotary Inspection System (IRIS): A technique suitable for inspecting ferrous, nonferrous, and non-metallic tubing. IRIS detects and sizes wall loss caused by corrosion, erosion, wear, pitting, cracking, and baffle cuts
  • Magnetic flux leakage (MFL): A fast inspection technique suitable for inspecting aluminum-finned carbon steel because the fins do not affect the magnetic field. MFL
  • measures wall loss and detects sharp defects such as pitting, grooving, and circumferential cracks
  • Remote Field Testing (RFT): A technique suitable for inspecting ferromagnetic tubings such as carbon steel or ferritic stainless steel. RFT detects and measures volumetric defects caused by erosion, corrosion, wear, and baffle cuts. Alhoty uses that Olympus remote field probes and the MultiScan™ MS 5800 to inspect heat exchangers, feedwater heaters, and boiler tubes