NON-DESTRUCTIVE TESTING

MAGNETIC TESTING (MT)


Magnetic Particle Inspection is used for detecting surface and shallow sub-surface discontinuities in ferromagnetic materials with the implementation of a magnetic field. Dry particle and Wet Suspension (using visible or fluorescent particles) are the two (2) basic techniques which are selected based on the sensitivity and surface configuration of the part. MT is extremely portable, and does not require excessive pre-cleaning of the material. It is also one of the best options for detecting fine, shallow surface cracks and will work through thin coatings.




LIQUID PENETRANT TESTING (PT) (Dye & Fluorescent)


Liquid penetrant testing is a highly sensitive, relatively fast, low cost and extremely reliable method of detecting surface-breaking flaws in non-porous materials. Some of these flaws include porosity, cracks, fractures, pin holes, etc. which may be caused by fatigue, impact, quenching, machining, grinding, forging, bursts, shrinkage or overload. The two basic types of penetrants used are Visible and Fluorescent which is selected based on the sensitivity required to detect an indication.




ULTRASONIC TESTING (UT)


Ultrasonic employs high frequency sound energy to propagate ultrasonic waves in a test part for the purpose of flaw detection/evaluation and dimensional and thickness measurements. This inspection can be used to detect cracks, inclusions, weld defects etc. and can be used in the following applications:- structural welds, forging, casting, pipelines, tank shell and plates, engines, turbines, ship hulls, etc.




EDDY CURRENT TESTING (ET)


Eddy Current testing is one of several non-destructive testing methods that use the electromagnetism principle. Eddy current testing utilizes electromagnetic induction to detect discontinuities in conductive materials. The two major applications of eddy current testing are surface inspection and tubing inspections. Surface inspection is used extensively in the petrochemical industry and aerospace industry. The technique is very sensitive and can detect tight cracks. Surface inspection can be performed on both ferromagnetic and non-ferromagnetic materials, even through coating. Tubing inspection is generally limited to non-ferromagnetic tubing and is known as conventional eddy current testing. Conventional ECT is used for inspecting heat exchanger and chiller tubing in the power and petrochemical industries. This technique is very sensitive to detect pits, cracks and general wall loss, both on the tubes internal and external surfaces.




REMOTE FIELD TESTING (RFT)


Remote field testing (RFT) is a non- destructive electromagnetic testing technique used to find defects in ferromagnetic boiler and heat exchanger tubes. This method of inspection has the advantage of detecting defects on both the inner and outer surfaces of a ferromagnetic tube. This technique can detect defects such as pitting and general wall loss.




INFRARED THERMOGRAPHY TESTING (IR)


Infrared Thermography involves the mapping of surface temperatures to produce a thermal image and identify problematic “hot spots” for processes and equipment in the mechanical and electrical industries. A main advantage of this method of testing is that the equipment does not have to be in contact with the area being monitored.




BORESCOPE INSPECTION


A Borescope is a device that is mainly used to non-destructively inspect industrial systems and equipment of its condition by internally viewing them, it is a tool used to view areas that would otherwise not be visible. Some common inspections include internal viewing of pipes, heat exchangers, and pressure vessels, welds manufactured of machined parts, internal combustion engines, gear boxes, turbine engines etc.




PAINT & COATING INSPECTION


Painting and Coating inspection ensures quality assurance and quality control at every stage of the coating process in compliance to all specifications. From the preparation of the surface to be coated, through climatic condition monitoring to the dry film thickness evaluation, visual assessment and gauge-based testing, all to ensure the intended service life of the corrosion protected system.




ACCOUSTIC EMISSION TESTING (AE)


Acoustic emission (AE) testing involves the detection of released energy in the form of transient elastic waves via sensors installed on the test object. These elastic waves are a direct result of a sudden redistribution of stress in a material. In AE testing the elastic waves are converted to electrical signals to give information relating to the strength of the material and detection of defects. AE testing can be performed on storage tanks, vessels, cylinders, hydrogen and nitrogen bullets, etc.




MAGNETIC FLUX LEAKAGE TESTING (MFL)


MFL testing is a largely used, non-destructive testing method for detecting corrosion and pitting in steel structures. It is often used for integrity assessment of piping and storage tanks. The basic principle of MLF involves magnetizing a ferrous metal object to saturation level with a powerful magnetic field. If the object has no flaws, the magnetic flux will remain undisturbed. It is usually supplemented by UT testing to verify the extent of wall loss in the suspected areas. Corrosion of tank floors can lead to loss of product and damage to the environment thus making MFL testing necessary to prevent the occurrence of these problems.




ULTRASONIC TESTING VIA ROBOTIC CRAWLER


Ultrasonic inspection via the robotic crawler allows for remote access on ferro-magnetic surfaces such as pipeline, tanks, vessels etc., to acquire thickness measurements, corrosion mapping or profiling and identifying defects without the need for scaffolding or rope access.




PRESSURE TESTING


Hydrostatic or Pneumatic testing is carried out in accordance with ASME section VIII, UG-99 – UG101for vessels, after the construction, installation or repairs to verify design parameters, workmanship, etc. Piping systems are pressure tested to ASME B.31.3 Section 345 to ensure reliability, verify maximum capacity, check for leaks, etc. Pressure Testing of miscellaneous equipment such as LPG cylinders and piping, manifolds, hoses, etc.




VACUUM LEAK TESTING


Vacuum leak testing is the principal leak test method for testing parts with potential leakage from an external source into their housings and casings. Parts like underwater sensors or housings, outdoor electrical housings, sealed components, and components associated with vacuum sources are all prime candidates for vacuum leak testing.





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