Advanced NDT Techniques

• Guided Wave Testing
  Quick Enquiry

  Guided wave testing is a form of ultrasonic testing in which the sound waves are sent along the length of a pipe to get information about the condition of pipe.

  Here tens of meters of piping are examined in one setting. It can be applied economically for buried, insulated or elevated piping. It is cost-effective, because, with minimal removal of insulation, scaffolding or excavation, the plant operator can assess the condition of long lengths of pipe work.

  Guided Wave Testing-Capabilities

  • The test can be carried out at elevated temperatures without taking the pipe out of service.
  • 100% of the pipe is inspected (within the diagnostic length of a test).
  • Pulse echo type operation provides information on feature position and severity.
  • Sophisticated analysis aids interpretation of results.
  • Interpretation possible between defects and standard pipe features.
  • Ability to detect metal loss and planar defects at long range.
  • Metal loss may be internal or external.
  • Sensitivity can be as good as 1% loss of cross-section in ideal conditions (but is typically set at 5%).
• Phased Array Testing - PAUT
  Quick Enquiry

  PAUT is an advanced method of ultrasonic testing that has applications in industrial testing. PAUT image shows a slice view that may reveal defects hidden inside a structure or weld. It uses an array of elements, all individually wired, pulsed and time shifted. The technique also provides a combination of various scans in the same equipment set-up like B-Scan, C-Scan and the S-Scan. The phased array beams can be steered, scanned, swept and focused electronically.

  Phased Array Testing- Key Features:

  • Electronic scanning permits very rapid coverage of the components, typically an Order of magnitude faster than a single probe mechanical system.
  • Beam steering (usually called sectorial scanning) can be used for mapping Components at appropriate angles to optimize Probability of Detection. Sectorial Scanning is also useful for inspections where only a minimal scanning length is possible.
  • Beam forming permits the selected beam angles to be optimized ultrasonically by orienting them perpendicular to the predicted defects, for example Lack of Fusion in welds.
• Time of Flight Diffraction: TOFD
  Quick Enquiry

  Time of Flight Diffraction (TOFD) is an advanced automated computerized UT based NDT technique, used for in-service inspection of welds for heavy walled pressure vessels. TOFD system is capable to scan, store and evaluate flaw indications in terms of height, length and position with greater accuracy.

  • Two probe method – highly damped, short pulse Compression probes are attached in an array at a fixed distance
  • It does not rely solely on reflected sound to provide data; it uses a combination of both reflected and more important Diffracted sound energy

  TOFD provides

  • High POD
  • Accuracy
  • Real-time Sentencing
  • Transparent Recording of Results
  • Permanent Record
  • Repeatability
  • TOFD data should be used in with pulse echo data for effective signal characterization

  TOFD: Advantages

  • Fast
  • Proven
  • Cost Effective
• Tank Floor Inspection - MFL
  Quick Enquiry

  The FloormapVS2i from Silverwing TM (UK) Ltd.'s is a computerized MFL system designed to detect, size and map corrosion on storage tank floors and is currently the most widely operated MFL tank inspection system in the world. The battery powered, motorized FloormapVS2i scanner is complimented by powerful, yet easy to use dedicated software packages that work seamlessly to enhance efficiency and simplify the data collection and reporting workflow. The off-line reporting software package produces a comprehensive yet easy to read report and provides several useful tools to assist with post inspection decision making.

  Key features

  • Automatic CAD Drawing
  • Patch Plate Design Feature
  • Ruggedized Touch Screen Computer
  • Real Time Data Acquisition and Analysis
  • Hard Copy and Electronic Report Function
  • Combined Defect Profiling and Amplitude Analysis
  • Add Data from Visual, UT, Vacuum Box and MPI Inspection
• Tube Inspection: ECT / IRIS / MFL / RFET
  Quick Enquiry

  MultiScan MS 5800â„¢ The powerful MultiScan MS5800 acquisition unit pushes the limits of NDT inspection with its all-in-one solution. IRIS (Internal Rotary Inspection System) of ferrous/non ferrous tubes, RFET (Remote Field Electromagnetic Testing) of Ferro magnetic tubes, Heat Exchanger Tubes, Boiler tubes, Boiler swage tube region, Fin Fan, ET of Tubes (non-ferrous tubes), MFL testing of Ferro-magnetic tubes

• Eddy Current Testing (ECT)
  Quick Enquiry

  Eddy current testing is a noncontact 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.

• Internal Rotary Inspection System (IRIS)
  Quick Enquiry

  TThe 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. Olympus digital IRIS inspection technology is used extensively as a prove-up technique for remote field testing, magnetic flux leakage, and eddy current inspections.

• Remote Field Electromagnetic Testing (RFET)
  Quick Enquiry

  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.

• Magnetic Flux Leakage Testing (MFL)
  Quick Enquiry

  Magnetic flux leakage (MFL) is a fast 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.