Utilizing Magnetic Flux Leakage technology together with the state of the art Acquisition and Analysis software from Silverwing, we are able to provide:

• Full 3D Tank Floor Mapping
• Top & Bottom Defect Discrimination
• Enhanced Probability of Corrosion Detection
• Advanced Defect Sizing and Classification Tools

Together these innovative features achieve significant advances in Tank Inspection Corrosion Measurement, with the potential to reduce inspection times and significantly enhance the quality of a Tank Inspection. This enables tank engineers to determine the optimum repair strategy and improve the outcome of Fitness For Service (FFS) Assessments, Remaining Life Assessment (RLA), and Risk Based Inspection (RBI) programs

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

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 an 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.

Bubble leak testing or vacuum box testing is an integral part of a tank inspection process as recommended by API and other international standards to establish the condition of a tank bottom plate weld or shell to bottom plate weld.

ACFM® is an electromagnetic inspection technique that introduces an alternating current into the surface of the component to detect surface-breaking cracks. The presence of a crack disturbs the electromagnetic field and the return signal is instantaneously converted by advanced mathematical techniques, so that the operator is alerted to the presence of a defect. Immediate defect sizing and recording is a major benefit compared to alternative NDT methods.

Results from independent testing shows that ACFM® matches the performance of MPI for inspecting underwater structural welds, but the level of missed and spurious signals is significantly lower when using ACFM® compared to MPI and conventional Eddy current testing.