Alpha Sonix NDT Solutions Private Limited

Near Field Array NFA tube testing is an electromagnetic testing method for detecting discontinuities on the internal surface of fin-fan type tubes and ferromagnetic (Carbon steel) heat exchanger tubes.
NFA – Near field Array testing uses an array of coils (up to 30 coils) that activate in sequences, similar to ECA – Eddy current array testing. Unlike traditional Eddy current testing, which only uses a bobbin coil, NFA – Near field Array testing includes tangential coils that help gather detailed data and discontinuities in all directions.The most efficient test method for examining Aluminum finned carbon steel tubes is NFA – Near field Array tube testing. Because the external aluminium fins interfere with the quality of the signals acquired, aluminium finned carbon steel tubes are the most difficult to check. Internal pitting, internal cracks at the tubesheet, internal erosion, and the resulting wall loss can all be detected with NFA – Near field Array tube testing, which can also discriminate the location and size of discontinuities.For signal analysis and reporting,
This NFA method is:
Fast, Accurate, Traceable, and Archivable a digital paper trail
LMATS employs Eddyfi's Magnifi software. The software allows NFA – Near field Array tube testing data to be shown and reported in 2D and 3D 'C' scan formats, which can help asset owners make informed decisions based on the accurate position and precision of the discontinuity.

Ideal Applications:

• Most ideal for efficient and reliable inspection of Aluminum finned tubes and ferromagnetic heat exchangers
• NFA – Near field Array tube testing is ideal for inspecting tubes in the range of 19.05mm to 38.10mm diameter
• NFA – Near field Array tube testing is ideal for detecting internal diameter discontinuities such as pitting, cracks at tube sheet, erosion and wall loss on finned heat exchanger ferromagnetic tubes.

• Advantages:

  • NFA – Near field Array tube testing can provide 2D and 3D ‘C’ scan images to assist the asset owner to locate exact location of the discontinuity and its precise size
  • NFA – Near field Array tube testing can precisely measure volumetric discontinuities of approximately 3mm in a single pass
  • NFA – Near field Array tube testing can detect both axial and circumferential cracks
  • NFA – Near field Array tube testing can be performed comfortably at 6meters per minutes enabling to reduce downtime of the heat exchanger maintenance
  • NFA – Near field Array tube testing does not use magnets and hence the pull speed does not affect the sensitivity s compared to MFL -Magnetic flux leakage technique
  • NFA – Near field Array tube testing does not use water (Unlike IRIS – Internal Rotary Inspection System) and hence post cleaning and drying is not required minimizing the risk of water contamination pitting.

Time of Flight diffraction Welding flaws can compromise the welded structure’s stability and integrity. When it comes to testing welds, Time of Flight Diffraction, high-performance non-destructive testing ndt technique, provides accurate detection and sizing of cracks, slag, and lack of fusion in true wall direction, allowing you to access the vessel’s life. We will be with you throughout your testing project and will provide you with tailored solutions. Weld testing using the TOFD technique, data processing, and report preparation using the developed software are all part of our capabilities. We believe that using our tofd inspection service will result in significant time savings throughout the life cycle of new construction and replacement projects. It is an excellent and widely accepted pre-service and in-service inspection tool that is recognized internationally, with defined codes, standards, and acceptance criteria available for its use.

Magnetic flux Leakage  This method provides the detection of corrosion, pitting, and erosion of pipes.Magnetic flux leakage  mfl is an ndt method that is used to detect corrosion, pitting, or erosion in steel structures like pipes, floors, storage tanks. These can lead to loss of product and damage equipment hence it becomes necessary to inspect such parts to prevent the occurrence of such problems.

MFL provides high-speed and reliable inspection of steel structures. Our highly qualified inspectors have gained years of experience in inspection and mapping structures. We use highly advanced MFL instruments to carry out inspection.
This method uses permanent magnets or electromagnets to magnetize the part up to the saturation point and changes in the magnetic field are recorded. If there are any discontinuities the magnetic field leaks and then this leakage is analyzed to determine the location and nature of the defect both near the surface and far away.  
A map can be created using the data recorded which in turn helps in proper remedial action to be taken and for future planning and scheduling.

Alpha Sonix is committed to providing Total Quality Assurance and ensuring inspections meet deadlines, standards, and are carried out safely and efficiently. While the schedule of maintenance is coordinated in such a way that minimizes disruption in business occurs while providing an optimum level of inspection within minimum possible time.