Gulf Line Oil & Gas Services (GLOGS)
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Eddy current testing, also known as ECT, is a non-destructive testing (NDT) method that uses electromagnetic induction to detect flaws and evaluate material properties in conductive materials and it is very sensitive to a great number of variables such as cracks, corrosion, fretting, erosion, material thickness, coating thickness, material changes; making it a powerful examination tool. In addition to fault detection, this technique can measure material and coating thickness and determine heat treatment condition.
The eddy current method of non-destructive testing is widely used in a number of industries, including mining, aerospace, automotive, power generation, manufacturing and in the military. The technique is popular as it provides accurate as +/- 5% sensitivity results and is fast in comparison to other NDT methods.
Radiographic testing, or Industrial Radiography technique contains the use of penetrating gamma or X-radiation to examine parts and products for imperfections. An X-ray machine or radioactive isotope is used as a source of radiation. Radiation is directed through a part and onto film or other media. The resulting shadowgraph shows the internal soundness of the part. Possible imperfections are indicated as density variations in the film.
Radiographic applications fall into two distinct categories evaluation of material properties and evaluation of manufacturing and assembly properties. Material property evaluation includes the determination of composition, density, uniformity, and cell or particle size. Manufacturing and assembly property evaluation is normally concerned with dimensions, flaws (voids, inclusions, and cracks), bond integrity (welds, brazes, etc.), and verification of proper assembly of component pieces.
Magnetic Particle Testing (MT) is a non-destructive testing (NDT) process for detecting surface and shallow subsurface discontinuities in ferromagnetic materials such as iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part. The piece can be magnetized by direct or indirect magnetization. Direct magnetization occurs when the electric current is passed through the test object and a magnetic field is formed in the material. Indirect magnetization occurs when no electric current is passed through the test object, but a magnetic field is applied from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current, which may be either alternating current (AC) or some form of direct current (DC).
Ultrasonic Inspection is a non-destructive method in which beams of high-frequency sound waves are introduced into materials for the detection of subsurface flaws in the material. The sound waves travel through the material with some attendant loss of energy and are reflected at interfaces (cracks or flaws). The reflected beam is displayed and then analyzed to define the presence and location of flaws or discontinuities.
The most commonly used ultrasonic testing technique is pulse echo, wherein sound is introduced into a test object and reflections (echoes) are returned to a receiver from internal imperfections or from the part’s geometrical surfaces.
Applications include inspections for voids, cracks, and laminations, inspections of welds and thickness measurements.
Gulf Line provides visual testing (VT) services for multiple industries and assets. Typically, these services are performed while the asset remains in-service, during maintenance outages or while under construction. Gulf Line certified inspectors not only identify discrepancies for code and regulatory compliance but also offer quality control services during fabrication and/or construction of equipment and facilities.
GLOGS follows the certification requirements from the American Petroleum Institute (API) and offers the following technical personnel:
⦁ API 653 above Ground Storage Tank Inspectors
⦁ API 510 Pressure Vessel Equipment Inspectors
⦁ API 570 Piping Equipment Inspectors
⦁ API 936 Refractory Material Inspectors
⦁ API 579 Fitness for Service Engineer Assessments
⦁ API 580/1 Risk Based Assessment Approaches
NDT liquid penetrant testing or dye penetrant inspection (DPI) is used to locate surface material defects through the application of a die penetrant and developer powder.
Post weld heat treatment (PWHT) is a regularly performed, controlled process in which an object is being reheated to a temperature below its lower critical transformation temperature. It is held at this specific temperature for a certain amount of time. This process is being done after the object has been welded. This is done in order to ensure that the material will retain its strength. It will reduce residual stresses by heating the material to a specific temperature and then gradually cooling it. Moreover, it prevents hydrogen induced cracking from happening by post heating the object immediately after completion of the weld. Besides, it will enhance material strength and the treatment can also function as a method of hardness control. For example; within the different industries of oil, gas and petrochemicals, it is mandatory to ensure a safe design. Post weld heat treatment is a form of establishing those mechanical properties.
Acoustic emission testing is a non-destructive testing method designed to monitor sound waves emitted during material stress or failure. This condition monitoring method enables inspectors to examine metal deformation under stress and detect the sound of cracks and failures growing within the material. If you need to detect flaws in metallic pressure equipment, acoustic emission testing is one of the most reliable ways to detect the early stages of stress corrosion cracking. When a material undergoes stress or a series of internal changes such as corrosion, it generates energy from localized sources which produces sound waves.
Unlike other non-destructive testing methods, AET testing does not send energy into the inspected pressure vessel, but rather detects the energy emitted by the equipment itself. This technique is therefore time-effective because it can be performed during material operation. Acoustic emission testing enables you to monitor and inspect your entire pressure equipment, from tanks to welds. It provides immediate results and early warning of possible damage or failure in pressure equipment as well as solutions to determine the appropriate pressure level.
Acoustic emission testing is applied to inspect and monitor pipelines, pressure vessels, storage, tanks, bridges, aircraft and bucket trucks, and a verity of composites and ceramic components.
Unlike UT which is done in various clock positions on pipelines; LRUT does 100% scanning of the pipeline from a single location. It can inspect inaccessible areas like offshore risers & offsite piping, road crossings, dykes, culverts, in-cased pipelines etc. LRUT is used as a screening tool by all of the major Oil and Gas companies for more than 12 years now.
Corrosion under Tank Annular Plates (CUTAP) is one of the areas where SRUT technique is used to find out active corrosion while the tank is in service. Other applications involve Testing Concrete Coated Interfaces, Corrosion under Pipe Supports (CUS), Tank Dyke Piping Interfaces, Saddle supports for pipes and vessel etc.
PECT is used for Corrosion under Insulation (CUI) applications and in this technique thickness measurements can be made through any type of non-metallic coatings / insulations without removal of insulation / coatings. Typical applications are Concrete coated Horton Sphere Legs, Insulated pipelines, brick lined / concrete coated Vessel Skirts etc. PEC can be done online without disturbing the operations even at high or at sub- zero temperatures.
Internal Rotary Inspection service (IRIS) is an ultrasonic method sensitive to both ID and OD forms of volumetric wall loss. Measurements as accurate as +/- 5% Inches can be obtained. However, IRIS accuracy and sensitivity are compromised when in used with the presence of ID or OD deposits, bends, and geometry changes. Tube cleanliness is critical for this method. IRIS is not sensitive to non-volumetric forms of degradation such as cracking
Phased Array Ultrasonic Testing (PAUT) allows complex geometry materials to be inspected from a single access point by providing beam steering, dynamic focusing and electronic positioning capability.
Time of Flight Diffraction (TOFD), 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 and ongoing 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
API 653 requires tank floors to be inspected while the tank is out-of-service. GLOGS provides qualified-certified-experienced inspectors with technicians to perform magnetic flux extrusion on the tank floor. Theoretically, magnets or electromagnetic energy is impregnated into the tank floor through the tank floor scanner. Pick up coils installed on the scanner measure distortions within the magnetic field. These distortions are the result of wall loss such as corrosion or erosion. The technicians using the floor scanners are able to evaluate the magnetic field distortions screening for the presence of top and bottom side corrosion. GLOGS’s procedure, once the tank floor is screened, requires indications to be proven and sized using other methodologies such as thickness gauging, corrosion mapping, metrology and similar.
⦁ Most reliable inspection method available.
⦁ Repeatable results assuming similarly skilled technicians.
⦁ 100% coverage of the tank’s floor including HAZ areas around welds.
⦁ Able to scan the annular plate which is most susceptible to bottom side damage.
⦁ Exceeds API 653 Inspection Requirements.
⦁ Improves overall integrity management programs.
⦁ Used to create tank repair scopes of work, which can be audited.
⦁ Documentation of inspection performed is provided.
The key to GLOGS’s in-service inspections is the robotic inspection system, a remotely manually controlled robot specifically designed to inspect smaller tank floor bottoms in service.
Electromagnetic scanning involves rapid corrosion screening of boiler water wall tubes to Detect and report corrosion/ erosion and other damage mechanisms.
We’re glad to discuss your organisation’s situation. So please contact us via the details below, or enter your request.