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Conventional NDT

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Ndt Cta 01

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Ndt Cta 01

Radiographic Testing - RT

  • X-ray testing involves the detection of flaws within a material using radioactive substances and film. The data recorder is ideal for inspecting defects deep within the radiographic direction.
  • Radiographic testing (Radiographic Testing) is a test by emitting high-frequency electromagnetic waves from a radiation source through the work piece. which may be made of various materials Based on the principle of energy absorption of unequal materials or materials having unequal densities. such as having air cavities inside This allows more radiation energy to pass through the workpiece in the hollow area. and can react with photosensitive substances coated on the film surface more than other parts When the film is washed out, it has a darker color than other services. Therefore, radiography is the interpretation of the shadow of the workpiece that appears on the film itself.
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Magnetic Particle Testing - MT

Magnetic testing measures surface defects by applying induction from a direct or alternating magnetic field. The method is to sprinkle a small amount of dyed iron powder on the test area. (Mostly iron powder spray) and then use a device to create a magnetic field, either permanent magnet or electromagnetic. If small cracks are found on the surface of the workpiece, the area will appear as iron powder. Clinging along crack lines because iron powder cannot jump through cracks along magnetic lines of force.

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Visual Testing -VT

Visual inspection testing is testing the workpiece by using the eyes of the tester and can use other testing equipment such as magnifying glass, various length measuring tools. It is a visual inspection by a specialist to look for signs of a defect.

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Penetrant testing - PT

  • Penetration testing is used to inject paint onto the material surface and clean the paint on the material surface to inspect the surface cracks with the naked eye or under black light.
  • Penetrant testing is a method for finding flaws or discontinuities that are open to the surface. It can be tested on all non-porous materials such as glass, plastics, ceramics, metals, non-metals, etc. This testing is based on the reaction principle. Penetrate (Capillary action), which is a natural phenomenon. By applying or spraying a dyeing liquid that has the ability to penetrate into cracks or small holes well Then a chemical or solution that resembles a blotting paper will be used. Spray or sprinkle on the area to be tested. If there are any cracks or defects on the work surface, there will be lines or lines of the dye to be seen clearly. Penetrant testing is available in both the color contrast method and the dark room method using black light (fluorescent).
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Ultrasonic Testing - UT

  • Ultrasonic testing is an inspection using sound waves to measure the thickness and find defects that occur in the material.
  • Ultrasonic testing is a method of testing using high-frequency sound waves that the human ear cannot hear. (Ultrasonic sound waves are sound waves with a frequency higher than 20,000 Hz.)
  • Sound travels faster in solids than in air or gas. Because the molecules are closer together, for example, the speed of sound in air and aluminum is 333 m/s and 6320 m/s respectively. When sound travels through a homogeneous solid medium, the sound intensity will not decrease much But if the sound passes through the discontinuity (Discontinuities) that are approximately equal to the wavelength or larger. Sound will be reflected (Reflect) or absorbed by the discontinuity.
  • High-frequency sound waves are generated from the crystals inside the probe. The sound waves travel to the specimen through a couplant. Reflected from the bottom surface of the workpiece (Back Wall echo)
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Ultrasonic thickness measurement (UTM)

Ultrasonic thickness measurement (UTM) is a non-destructive method for testing material thickness based on the principle of high-frequency sound waves being transmitted to the specimen to be tested. Sound waves reflected from the other side of the workpiece surface. The value of the thickness of the workpiece will be calculated. to show results on a digital screen It is commonly used to inspect the metal thickness of hull pipes and structural steel. and gas tanks, oil tanks, pressure tanks, etc. Thickness measurement is important in many industries. Used to inspect for corrosion, corrosion and damage. For the safe reuse of inspected materials or structures, ultrasonic thickness measurements can also assist in determining whether the material or structure should be repaired or replaced.

Vacuum box Test API 650

  • The vacuum test is to inspect the seal for leakage using a pressure differential technique inside and outside the package.
  • Vacuum Box Test is a method for checking leaks of the tank bottom, especially at the joint or connection between the bottom plate and the corner connection between the bottom and shell (Shell -to-bottom welded joint) by The method is to anoint the surface to be tested with soap solution and then use a vacuum box to suck air. If the Tank Bottom has a leak, air will be sucked through the leak and cause bubbles to occur.
  • This method creates a vacuum (negative pressure) inside the Vacuum box with the Venturi effect principle by using an air compressor (Air compressor) to blow air through the Air ejector attached to the Vacuum Box, causing the air in the Vacuum Box to be sucked out and then vacuum or can be used as a vacuum pump to generate negative pressure
  • If there is a leak in the tank bottom area, air will be sucked from under the tank floor through the leak and create a bubble bubble that lets us know the location of the leak. An example in the picture is a leak detected at the Three plate joint welding area, which we can see as small bubbles coming out of that area. This indicates that a leak has occurred.
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Hydrostatic test - HT

Hydrostatic Testing is a water pressure test. Most of them will be tested in containers that have to be used to handle pressure in use, such as Boiler tanks / Pressure vessels / Various pipe patterns / General pressure tanks / Gas storage and filling tanks / Ammonia tanks / LPG gas tanks NGV tanks or all types of pressure tanks

Positive Material Identification - PMI

  • Chemical composition testing is an examination to determine the chemical composition of materials that are essential metals in industrial applications.
  • Positive Material Identification – PMI is a chemical composition analysis to identify the type and material grade of various metal alloys. For quality control (Quality Control) and safety control (Safety Control) of the metal materials to be used, the analysis results obtained from the PMI will show the elements that are the chemical composition of the material and the amount detected by Usually reported in percentage (%) or ppm/ ppb and also indicates the grade of material detected.
  • PMI is an inspection technique used to accept or reject metal materials to be used to determine whether the metal alloy to be used is correct or to determine its chemical composition. Of some elements that are not required or not because some elements, if the amount is higher or lower than the specified specification, may affect the mechanical properties (Mechanical Properties) that may change and affect the application. PMI Alloys inspection methods are used in QC, Safety Compliance processes and are part of the Production and Asset Integrity Management system.

Helium Leak detection

Helium Leak Detection A technique for finding small leaks by using helium gas in a high-pressure tank or other container. where other methods cannot find leaks because helium is an inert gas that is difficult to react with and has a small molecular size that can penetrate through small leaks of the test specimen Therefore, it is used to find leaks of workpieces. Techniques for detecting leaks using helium (Helium Leak Detection Techniques) can be divided into two types: Vacuum method (Vacuum Methods) and Sniffing Methods

Hardness test

Hardness testing is testing the hardness of metals in their resistance to processing. which is useful in designing various pressure vessels A measure of its ability to withstand permanent deformation as well as how much it deforms. Which can test the hardness of materials by various methods such as compression, scraping, impact drilling, etc. The hardness of a material can be regarded as a basic value that can indicate the overall properties of the material. In industrial applications, there is a material selection process for the workpiece, material hardness is an important factor in the process. Tests must be performed with appropriate equipment and the testing should be carried out under the supervision of a specialist. It is important to note that hardness testing is a process that is initiated before any conclusions about the material in the workpiece are reached. really Because the results of the tests will be analyzed and drawn. As a result, operators can select materials to use in production appropriately according to their objectives. Including enabling it to be used with maximum efficiency.

Holiday Detector/Pin Hole test

Checking for leaks in the coating is a check for leaks in poor coatings that allow moisture or water to penetrate.

Eddy Current Testing

Eddy Current Testing is a testing method based on the principle of electromagnetic induction (Electromagnetism) causing an eddy current on the specimen and observing the change in the Impedance of the test head. This is a result of the eddy currents on the workpiece changing due to differences in properties. Shapes or inconsistencies in the material It can only test conductive materials.