Continuous wave eddy current testing is one of several non-destructive testing methods that use the electromagnetism principle. Conventional eddy current testing utilizes electromagnetic induction to detect discontinuities in conductive materials.
Visual Inspection
Visual inspection is one of the most common and most powerful means of non-destructive testing. Visual testing requires adequate illumination of the test surface and proper eye-sight of the tester. To be most effective visual inspection does however, merit special attention because it requires training (knowledge of product and process, anticipated service conditions, acceptance criteria, record keeping, for example) and it has its own range of equipment and instrumentation .Often the equipment needed is simple for internal inspection, light lens systems such as bore scopes allow remote surfaces to be examined. ALPHA providing testing facility contain s light meters, welding gauges, magnifiers, lenses, other measuring instruments and equipments for precise control of surface quality. Our NDT inspectors, engineers and technicians are qualified to NDT Level I, II as per written practice prepared according to ASNT recommended practice SNT-TC-1A and in-house ASNT NDT Level IIIs for providing inspection and consulting services.
Radiography Test
Radiographic testing method is useful for the detection of internal flaws in many different materials and configurations especially used for quality assurance of castings, forgings and welds. An appropriate radiographic film is placed behind the test specimen and is exposed by passing either X-rays or gamma rays through it. The intensity of the X-rays or gamma rays while passing through the product is modified according to the internal structure of the specimen and thus the exposed film, after processing, reveals the shadow picture, known as a radiograph, of the product. It is then interpreted to obtain data about the discontinuities present in the specimen.
Magnetic Particle Test
Magnetic particle testing is a method for detecting cracks and other discontinuities on surface and subsurface of Ferro-magnetic materials. Sensitivity of detection is maximum at the surface and diminishes rapidly with increasing depth of sub-surface defects. Detection of defects depend on the fact that when a material is magnetized, discontinuities which lie transverse to the direction of magnetization cause distortion of the magnetic lines of flux and a leakage field is formed at or above the surface, some of these particles are held by the leakage flux. These magnetically held collection of particles form outline of effects and show location, shape and extent of the discontinuities. A number of factors such as direction and strength of the magnetic field, magnetic character of the part, location and orientation of discontinuities and type of the magnetic powder applied, affect the formation of the powder pattern, and therefore exact location of the flaw is indicated by the method.
Ultrasonic Test
Ultrasonic Testing (UT) uses high frequency sound energy to conduct examinations and make measurements. Ultrasonic inspection can be used for flaw detection/evaluation, dimensional measurements, material characterization.
Dye Penetrant Test
Dye Penetrant Testing is a technique by which a specially designed colored dye is used in conjunction with specially formulated developers to detect surface breaking indications on any ferromagnetic or non-ferromagnetic material to assist in determining the material integrity.
Phased Array
The TD Focus-Scan is a multifunction ultrasonic inspection system, designed to seamlessly perform multi-channel Phased Array, Time-Of-Flight-Diffraction (TOFD), Pulse Echo, Corrosion Mapping and ASME complaint Girth/Seam weld examinations in every area of engineering. It is mostly using to reduce the manpower loss occurring due to Radiation work and unlike conventional ultrasonic a permanent image is available which make the interpretation more standardize and can cross verify at any time.
PWHT
Post Weld Heat Treatment Services (PWHT) is defined as the stress relieving method after welding to improve the mechanical and chemical properties of welds.
Positive Material Identification (PMI)
Positive Material Identification (PMI) is One of the more specialized non-destructive testing methods. With Positive Material Identification the alloy composition of materials can be determined. If a material certificate is missing or it is not clear what the composition of a material is, then PMI offers the solution. PMI is particularly used for high-quality metals like stainless steel and high alloy metals.
Hardness Test
Hardness testing does not give a direct measurement of any performance properties. But hardness correlates with strength, wear resistance, and other properties. ALPHA is using the latest technology hardness testers for getting the more reliable and on the spot results.
CC TV Inspection
CCTV inspection generally consists of a remotely operated camera, mounted on a self-propelled robotic crawler that is connected to a video monitor at the surface. These systems are contained within a cargo van or a box truck; however, for easements or difficult-to-access locations, HUSA has portable CCTV systems mounted on easement machines or all-terrain, amphibious vehicles .this system using to find out cracks, rust, Pipe inclination, debris and other imperfection inside the line.
Magnetic Flux leakage Test (MFL)
Magnetic flux leakage (MFL) is a magnetic method of nondestructive testing that is used to detect corrosion and pitting in steel structures, most commonly pipelines and storage tanks.
Tank Calibration
In a world where business margins are shrinking, cost control in transaction of petroleum, LNG, LPG, chemicals and oils is very essential. While storing, transferring, blending or processing, strict consistency in volumetric measures is imperative. Accurate calibration of storage and process vessels is indispensable in maintaining a very high standard of your products. A high standard of calibration not only ensures quality products, but also less trouble with customers, govt. department, internal stock taking and accountability. Calibration of tanks is a science of accurately determining the volume in a confined vessel at various stages.