Profile RT – U Tubes of Heat Exchanger; For example, Profile RT (Digital) of the U Tubes ( -Heat Exchanger, ), which can be viewed Profile thickness Tube and Profile of Corrosion happens inside Tube Profile RT – Vent Nozzle of Acid Storage Vessel; Example of Profile RT (Digital) of Vent nozzle of Sulfuric acid storage vessel which can see profile of nozzle thickness and profile of corrosion occurring within the nozzle . Profile RT – Socket Weld Gap; For Socket Weld of Piping, ASME Standard will require Gap , approximately 1.5 mm. This can be checked by the Profile RT (Digital) which made Profile RT can also be used to view a Profile of the thickness of the pipes, In. Service is also possible Profile RT for CUI Inspection ; Today share a Case Study, using Profile RT for monitoring Corrosion Under Insulation (CUI) by shooting rays through Insulation occupies Pipe Fitting … Continue reading What is Profile Radiographic Test
RT – Backscatter; The backscatter is the radiation that reflects the obstacles or the background and falls onto the back of the film during radiation tests. (Radiographic Testing, RT). The Backscatter will reduce the contrast and sharpness of the RT film, which may not be visible. Discontinuity or defects that appear on the film. Therefore , too much backscatter is not acceptable for RT. RT – Backscatter Detection; How to detect a backscatter or the reflected rays behind the film According to ASME Section V regulations, this can be done by placing the lead letter “B” on the back of the … Continue reading What is Backscatter on Radiograhpic (RT)
RT Film Density Definition; Intensity (Density) of the Film from the Radiography Testing (RT) refers to the darkness of the RT film as measured by the amount of light that can penetrate RT film came to light that indicates that the Film with density is low, but if. Low light means that the film has a high density. RT Film Density Measurement; Measuring the intensity (Density) of the Film from the Radiography Testing (RT) can be achieved. Using a Densitometer to measure the amount of light that penetrates directly through the RT film, the device will display the number of film intensity Use Standard Film with different levels of intensity (Step Wedge Comparison Film) to compare with the intensity of our RT film … Continue reading What is RT film Density ?
Both BSI and ASTM have published standards for ‘combined’ fracture toughness test methods, allowing measurement of critical values of stress intensity (K), J and CTOD. The standards cover both ‘single-point’ values of fracture toughness and tearing resistance curves. BS 7448: Fracture mechanics toughness tests, is published in four parts: Part 1: ‘Method for determination of KIc, critical CTOD and critical J values of metallic materials’. Part 2: ‘Method for determination of KIc, critical CTOD and critical J values of welds in metallic materials’ – superseded by BS EN ISO 15653. Part 3: ‘Method for determination of fracture toughness of metallic materials … Continue reading BS 7448 vs ASTM E1820 CTOD fracture test
Non-destructive testing (NDT) is a testing and analysis technique used by industry to evaluate the properties of a material, component, structure or system for characteristic differences or welding defects and discontinuities without causing damage to the original part. NDT also is known as non-destructive examination (NDE), nondestructive inspection (NDI) and non-destructive evaluation (NDE). Methods of Non-Destructive Testing Current NDT test methods include: Acoustic Emission Testing (AE) This is a passive NDT technique, which relies on detecting the short bursts of ultrasound emitted by active cracks under a load. Sensors dispersed over the surface the structure detect the AE. It is even possible … Continue reading NDE vs NDT, NDI understanding
51. Which of the following is the best reason why the application of emulsifier by a brush is not recommended? A. The brushing action mixes the emulsifier with the penetrant prematurely and irregularly, making accurate control of the emulsification time impossible B. Brushing does not always completely coat the part, thereby leaving a portion of the part difficult to wash C. Brushing in itself is not harmful, but many types of brush materials combine with the emulsifier agents resulting in penetrant and part contamination. (answer) D. Brushing results in a streaking appearance during inspection 52. Developing powder should always be: … Continue reading NDT NDE ASNT Questions and answers for PT, LPI level II (6).
31. Which of the following is not a good practice when penetrant testing? A. Applying emulsifier by dipping the part in emulsifier B. Appling developer by spraying the part with developer C. Removal of water-washable penetrant with a water spray D. Applying emulsifier with a brush (answer) 32. Dry developer should be applied : A. So that a heavy coat of developer covers all surfaces B. So that a light dusting covers all surfaces to be inspected (answer) C. With a dry paint brush D. By dipping 33. Which of the following is not a form in which penetrant developer is … Continue reading NDT NDE ASNT Questions and answers for PT, LPI level II (5).
17. In Penetrant testing, brushing of Penetrant to the component is a. Not recommended b. Recommended c. Only criteria is adequate coverage d. B and C of the above (answer) 18. Even without developing, the Penetrant can come out of the discontinuity a. True b. False c. But it is very thin layer to be seen d. A and C of the above (answer) 19. How long must a part be kept wet with Penetrant before the removal process is started? a. It varies depending on the type of Penetrant used, the type of material to be tested, the sensitivity … Continue reading NDT NDE ASNT Questions and answers for PT, LPI level II (4).
9. The height of capillary rise of the liquid or the depth to which penetrant enters, is more in the case of a. Wide and shallow discontinuities b. Narrow and deep discontinuities (answer) c. More information is required d. Determined by contact angle and surface tension 10. A liquid in a capillary tube has a concave surface a. The liquid has high surface tension (answer) b. Low surface tension c. More information is required d. The liquid is a Penetrant 11. Which of the following is true of flash point consideration in liquid Penetrant inspection? a. Flash point affects the … Continue reading NDT NDE ASNT Questions and answers for PT, LPI level II (3).