Guided Wave Pipe Screening often referred to as “GUL”, or “LRUT” is a Long Range Ultrasonic Screening system which uses Low Frequency Ultrasound to propagate both up and down stream from one fixed attachment point, providing 10 to 300m of Integrity Assessment Data from one point without the need to excavate or remove insulation on the entire section being inspected, Inspection is non-intrusive and can be performed while the line is in service with temperatures of up to 180 degrees Celsius.



Ideal uses would include:
• Buried Pipe
• Road Crossings
• Elevated or Hard to Reach Piping (Pipe Racks)
• Insulated Piping (Corrosion Under Insulation Campaigns)
• Supported Piping (Corrosion Under Supports)
• Offshore Risers
• Bulk Product Lines
• High Temperature Pipes
• Desert and Jetty Lines

Corrosion Mapping using the Automated Robotic Rapid Motion Scanner allows for the Thickness Corrosion Mapping of large areas of Pipe, Plate, Tank, Vessel or Structure by utilizing a Emersion Probe and Water Feed Tethered to Ultra High Tech Software able to provide analytics of the area scanned as well as features such as Post Processing of Data, 3D Rendering of Indications as well as Modelling and Integration of other Inspection Activities on the same Asset.

Ideal uses would include:
• Direct Assessments (Dig Site Verification of Pigging or Cathodic Protection Audits)
• Internal and External Condition Assessment of Steel Pipelines
• Ducting Assessment
• Eroded Pipes
• Corroded Pipes
• Stress Corrosion Cracking Detection
• Remaining Life Assessment of Pipelines
• Ship Hull Assessment
• Tank/Vessel/Plate Assessment (Thickness Survey)

Twilight has Researched and Developed a Saturated Low Frequency Eddy Current Scanner with the ability of Scanning Materials up up to 100mm thick for the detection of Corrosion, Erosion, Stress Corrosion Cracking and Disbonding. The T-SEC Technology is able to inspect the asset being inspected through certain coatings such as Epoxy and Bitumen with a maximum thickness of 12mm. Surface preparation requirements are kept to a minimum as the scanner does not need to make direct contact with the surface being scanned. The T-SEC Technology is available in a Large Scanner Module which has a foot print of 200mm wide and the Bracelet Version which is modular and can be incremented up to 128 Channels with each of the 128 Modules having a 30mm wide foot print.

Ideal uses would include:
• Heavily Corroded or Scalled Pipes/Plates/Tanks/Structures
• Direct Assessments (Dig Site Verification of Pigging or Cathodic Protection Audits)
• Internal and External Condition Assessment of Steel Pipelines
• Ducting Assessment
• Eroded Pipes
• Corroded Pipes
• Stress Corrosion Cracking Detection
• Remaining Life Assessment of Pipelines
• Ship Hull Assessment

Ideally suited for the inspection of the following tubes:
• Boilers
• Feed-Water Heaters
• Air Coolers
• Heat Exchangers

The Ultrasonic IRIS option is used to Inspect a wide range of materials, including Ferrous, Nonferrous, and Nonmetallic Tubing. This technique detects and sizes wall loss resulting from Corrosion, Erosion, Wear, Pitting, Cracking, and Baffle Cuts.

IRIS Inspection Technology is used extensively as a prove-up technique for Remote Field Testing, Magnetic Flux Leakage, and Eddy Current Inspections, verifying and quantifying the losses indicated.

Ideally suited for the inspection of the following tubes:
• Condensers
• Feed-Water Heaters
• Heat Exchangers
• Air Conditioners

Eddy Current Testing is a Non Contact method used to Inspect Non Ferromagnetic Tubing. This technique is suitable for detecting and sizing metal discontinuities such as Corrosion, Erosion, Wear, Pitting, Baffle Cuts, Wall Loss, and Cracks in Nonferrous materials.

Two coils are excited with an electrical current, producing a Magnetic Field around them. The Magnetic Fields penetrate the Tube material and generate opposing Alternating Currents in the material. These currents are called Eddy Currents.

Any defects that change the eddy current flow also change the impedance of the coils in the probe. These changes in the impedance of the coils are measured and used to detect defects in the tube.

Ideally suited for the inspection of the following tubes:
• Boilers
• Feed-Water Heaters
• Carbon Steel Heat Exchangers

Remote field testing (RFT) is being used to successfully inspect FerroMagnetic tubing such as Carbon Steel or Ferritic Stainless Steel.

This technology offers good sensitivity when detecting and measuring volumetric defects resulting from Erosion, Corrosion, Wear, and Baffle cuts.

Remote Field is used all around the world to successfully inspect heat exchangers, Feed Water Heaters, and Boiler Tubes.

Ideally suited for the inspection of the following tubes:
• Feed-Water Heaters
• Air Coolers
• Carbon Steel Heat Exchangers

Magnetic Flux Leakage (MFL) is a Rapid Inspection Technique, suitable for measuring Wall Loss and detecting sharp defects such as Pitting, Grooving, and Circumferential Cracks.

MFL is effective for Aluminum-finned Carbon Steel Tubes, because the Magnetic field is almost completely unaffected by the presence of such fins.