NDT/NDE
AIW Tech Offers a wide variety of NDT/NDE Services. We offer NDT Level 2/3 Services & Consulting. AIW Tech specializes in procedure creation based on client specific scope and specifications. We inspect in all fields inclusive of sugar plants, coffee plants, gas plants, petro-chemical plants, power plants, utility plants. Training & Certification to all NDT methods/disciplines (General/Specific/Practicals). Deep Sea Underwater diving VT/NDT Inspections. AIW tech also specializes in remote visual (Borescope) inspections. AIW TECH provides highly skilled, experienced and motivated personnel qualified and certified in accordance with international certification schemes (e.g. PCN (EN 473/ IS0 9712), ANSI CP-189 and SNT-TC 1A/NAS-410/SAFA/SACA/EASA) in the conventional techniques that have underpinned the NDT industry from its earliest days. AIW Tech also provides Brinell Hardness Testing, Ferrite Testing & Positive Material Identification.
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Services:
* Liquid Penetrant Testing:
(Fluorescent/Visible/Solvent/Water Washable) The liquid penetrant examination (1/2,1,2,3,4) Sensitivity methods as an effective means for detecting discontinuities which are open to the surface of nonporous metals and other materials such as plastics, glass, and ceramics. Typical discontinuities detectable by this method are cracks, seams, laps, cold shuts, laminations, and porosity.
The liquid penetrant contains either a colored dye easily seen in white light, or a fluorescent dye visible under black (ultraviolet) light. The penetrant is applied by dipping, spraying, brushing, or flowing. After penetrant application, a sufficient time (dwell time) is provided to permit the penetrant to permeate the flaw.
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* Magnetic Particle Testing:
The magnetic particle testing Dry/Wet method may be applied to detect cracks and other discontinuities on or near the surfaces of ferromagnetic and electrically conductive materials. Magnetic particle examination techniques thus allow the detection of surface breaking cracks in steel objects of complex geometry, which typically is a challenge for RT methods. The sensitivity is greatest for surface discontinuities and diminishes rapidly with increasing depth of subsurface discontinuities below the surface. Typical types of discontinuities that can be detected by this method are cracks, seams, laps and cold shuts.
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* Ultrasonic Testing:
Ultrasonic Testing, also called Ultrasonic Flaw Testing or UT Thickness/Shear-wave/Phased Array, uses high frequency ultrasonic waves to detect surface breaking and internal imperfections, measure material thickness and determine acceptance or rejection of a test object based on a reference code or standard. Flaw detection is a fast and accurate inspection method to evaluate internal product integrity. Ultrasound penetrates deeply into materials searching for defects, cracks, delamination, lack of bonding and other discontinuities.
Shear wave Ultrasonic Testing or A-scan testing transmits an ultrasonic wave at a predetermined angle into the test material. Surfaces normal to the beam path and cornertraps reflect the wave energy back to the transducer. The display shows the distance the wave travelled to the imperfection and the relative strength of the energy.
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* Eddy Current Testing (Tubular/Surface/Rotary):
Eddy current testing (EC) or Eddy Current Surface Testing is used to inspect metallic parts and perform highly reliable flaw detection and alloy sorting of surface and near-surface defects. Eddy current probes generate magnetic fields that induce current that flows in a test piece influencing the magnetic field and magnitude and phase of voltage in the coil.
Eddy current testing is widely used in the inspection industry and in other manufacturing and service environments that require inspection of thin metal for flaws and defects. In addition to crack detection in metal sheets and tubing, eddy current can be used for certain metal thickness measurements and one of its advantages is that surface coatings (up to a certain thickness) do not need to be removed prior to inspection. We perform surface/rotary/tubular inspections.
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* Visual Testing:
Visual inspection (VT) is the original method of nondestructive testing (NDT) and is considered the most effective NDT testing technique for detecting surface defects. AIW Tech visual inspectors approach each job with a deep understanding of the applicable code requirements, products and processes, anticipated service conditions and acceptance criteria. Our certified technicians leverage their expertise to ensure that all defects are recorded. VT inspection captures 90% of In-Process Production defects prior to final.
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* Radiographic Testing:
Radiographic testing (RT) (ISOTOPE), a source of X or gamma radiation is used to produce an image of the component on photographic film (by placing the radiation source on one side of the component and the film on the other). Following exposure to radiation, the film is then processed and then viewed on an illuminated screen for visual interpretation of the image. Radiography gives a permanent record (the exposed film), which is a major advantage of the method, and is widely used to detect volumetric flaws (surface and internal).
X-ray equipment ranges from about 20kV to 20MV (the higher the voltage the greater the penetrating power of the radiation and the greater the thickness of component that can be tested). Gamma radiography is carried out using radioactive isotope sources (e.g. Cobalt-60, lridium-192) although its sensitivity is generally less than that achievable by X-ray radiography. lt is widely used for fieldwork because of its greater portability. We specialize in petrochemical construction & aerospace (Boeing, Airbus, Cessna, Learjet, Gulf-stream Aircraft).
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* Infrared Thermography:
In case of composite materials we have to deal with the presence of both high mechanical resistance parameters and low specific gravity. Hence in recent years their use rapidly grows in structures for which these characteristics are of paramount importance. There are mainly aerospace structures. Typical defects of composite materials are: delaminating, lack of adhesion, cracks, concentrations and deformations. These defects can come into being both in manufacturing processes and during exploitation. With the development of technology for producing composite materials the requirements are growing for assessment of their quality. For this purpose nondestructive testing (NDT) is used. NDT procedures using (IR) thermography can be divided into passive and active. For the diagnosis of defects in composite materials of aerospace applications the active IR thermography methods are used in many cases for verification of water ingress among other items.
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* Positive Material Identification:
PMI use of X-ray tube. The unit provides a quick field or laboratory method for chemical analysis or sample identification (sorting) directly from metal samples of various forms. The unit will determine the metallurgy elements & compounds. Carbon steel materials will be measured with a different instrumentation but carbon equivalent is also identified by our inspectors at AIW Tech. It obtains the grade ID of a sample in two to five seconds, with full report in five to 10 seconds. The reports are automatically generated and identify all main element groups. All stored data can be transferred to a PC via USVB cable. The unit is small and portable and ideal for data collection and storage in the field and is operated by only 1 inspector. The accuracy of the PMI unit is +/- 5%. The unit is calibrated by a 3rd party yearly and is accurate for elements including Cr, Ni, Mo, Ti, Cb, Ta, W, Co, V. Approximately 100 locations can be analysed per day. Grinding/preparations of sample surface are required prior to inspection.
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* Remote Visual Inspection:
Remote Visual Inspection can be used to visually inspect every possible tube. RVI doesn’t provide any information about defect depth. However it can be useful to obtain information about defect geometry and the possibly present degradation mechanisms in a tube. Defects can be photographed and the image of the whole tube can be videotaped. Remote Visual Inspection is mainly used as a backup tool to verify the result of other inspection techniques. RVI can be used to determine sugaring (Oxidation fail to purge) & Laminations among other internal defects that can not be identified externally by the naked eye. We concentrate on internal process tubing & identification parameters based off client specifications.
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* Brinell Hardness Testing (Digital/Antique):
A Nondestructive testing method that determines the hardness of a metal by measuring the size of an indentation left by an indenter on base metals, heat affected zones & welds. At a defined ball diameter and test force, larger indents left in the surface by the Brinell Hardness Testing Machine indicate a softer material. Hardness is the property of a material that enables it to resist plastic deformation (Unlike Toughness is the ability to take an impact). Also refers to resistance to bending, scratching, abrasion or cutting. We can measure & convert in any impressions to Brinell, Vickers, Rockwell Scales.
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* Ferrite testing:
Referred to as a ferrite-scope test, is a rapid non-destructive inspection method used to measure the amount of delta ferrite on austenitic stainless steel and duplex stainless steel materials. Ensuring proper ferrite content ensures corrosion resistance, durability and crack prevention.
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