When it is not practical to use a singlewall technique, one of. Radiographic standards for partial penetration welds have in the past not been considered feasible due to confusing indications on the radiograph, resulting from the partially welded joint. Radiograph interpretation castings the major objective of radiographic testing of castings is the disclosure of defects that adversely affect the strength of the product. The cri must successfully complete the part b portion of the cri exam and pass with the minimum percentage requirements as defined in aws qc15. For interpretation of the radiographs shown in fig. If your job responsibilities include reading and interpretation of weld radiographs, this program is for you. The suitability of any ndt method for a given application will be determined by considering the above elements. Radiograph interpretation welds pdf interpretation of radiographs takes place in three basic steps. The aws program will provide for a portable, individual certification, independent of employer. One common method of nondestructive testing is radiographic testing, whereby radiographic images, or xrays, of the weld are produced. This file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it.
Since the 1940s, the accepted inspection method for structural welds in the u. Guidebook for the fabrication of nondestructive testing ndt. Weld inspection based on radiography image segmentation with. It appears in the radiograph as dark line along or near the centre of the weld image. This ability requires the mastery of two identifiable and nonseparable components of visual diagnosis. Weld defect detection in industrial radiography based.
Radiography test inspection free ndt sample procedures. This standard provides standard reference radiographs and recommended radiographic inspection procedures for partialpenetration weldments in aluminum plate, casting. Inspection of welding defects by radiography examination rt source. This file is licensed under the creative commons attributionshare alike 3. Radiography presentation crystalline solids welding. The absence of the lead letter image indicates that acceptably low scatter levels have been achieved. Nde rt interpretation of radiography film inspection welding. The fiveday aws certified radiographic interpreter cri seminar is designed to ensure that individuals have the knowledge to properly assess indications produced on radiographic media of weldments or adjacent base metal. This standard provides standard reference radiographs and recommended radiographic inspection procedures for partialpenetration weldments in steel plate, casting, or. Weld metal rt film interpretation welding radiography free 30. During interpretation if the interpreter can discern a faint light image of the lead letter on the radiograph then this would indicate that excessive backscatter had been present during exposure and that the radiograph is unacceptable. Welds in which the radiographs show porosity should. Interpretation of radiographs takes place in three basic steps. The radiograph can be interpreted and the integrity of the object can be evaluated.
The basic principle of radiographic inspection of welds is the same as that for medical radiography. They travel at the same velocity of light and obey most of. Please visit the documents tab to access the cri 9. Nondestructive examination nde technology and codes. Russell marshall space flight center, marshall space flight center, alabama september 2007. Welding technology a terminology for welds, welded joints, welding procedures, weld discontinuities, base metal discontinuities. Basics of radiography testing and image processing2. Radiograph interpretation welds radiography welding. The interpretation of weld radiographs training course, developed by lloyds register and twi, introduces the basic requirements for successful weld radiograph interpretation and provides examples of weld defect images as generated by radiography. Certified radiographic interpreter american welding. Pdf radiographic interpretation radiographic interpretation. An interpretation or a differential diagnosis is made from the radiograph. Examination radiographs and master reports for the.
I created this video with the youtube video editor. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that. Interpretation of radiographs takes place in three basic steps which are 1 detection, 2 interpretation, and 3 evaluation. What are the responsibilities of a individual who is certified to radiographic interpretation level 2. Nunes marshall space flight center, marshall space flight center, alabama j. Radiographic testing of welds and weld testing are necessary steps in any pipeline construction process to detect flaws and defects within welded materials. Appears as a light continuous or more often intermittent, irregularly shaped band within the image of the weld. Excessive penetration sxp weld metal protruding through the root of the weld. Interpretation of weld radiographs nondestructive testing. Radiographic inspection of welds abstract this paper addresses the difficult problem of evaluating weld integrity of partial penetration type weld joints.
Radiographic interpretation is an essential part of the diagnostic process. Training in radiographic interpretation provides essential knowledge on radiographic theory and practice to enable interpreters to judge radiographic quality and. B influence on techniques of geometry, size, surface condition, base metal composition, weld metal structure. Ppt radiographic interpretation powerpoint presentation.
The aws radiographic interpreter certification assures employers and practitioners alike that the principles of radiographic interpretation are reliably applied to the examination of welds. Roentgen showed that xrays are a form of electromagnetic energy and are part of the same spectrum as light figure 51. Also one never makes use of a radiograph in cases where one can make use of other. The aws certified radiographic interpreter is required to recertify hisher certification every nine years. In addition to producing high quality radiographs, the radiographer must also be skilled in radiographic interpretation. Radiographic testing procedure industrial inspection. Each of the sessions is closed by an open discussion on the correct answers and reporting. Principles of radiographic interpretation pocket dentistry. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Likewise, one of the methods of weld inspection is radiographic film interpretation ri. Image processing for radiographic films of weld inspection. Unfortunately, the traditional interpretation of radiography images by. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Radiographic testing rt this method of weld testing makes use of xrays, produced by an xray tube, or gamma rays, produced by a radioactive isotope.
Dentists are expected to have basic skills in interpreting any intraoral or extraoral images that might be used in dental practice. In addition to producing high quality radiographs one should also be skilled in radiographic interpretation. The full mouth series and panoramic views steven r. A maj or advantage of radiography compared to other inspection techniques is the availability of objective quality evidence, the radiograph, as a. In the singlewall radiographic testing technique, the radiation passes through only one wall of the weld material, which is viewed for acceptance on the radiograph.
The radiographic interpretation course only covers the interpretation of the radiograph, therefore is suitable for personnel wishing to only interpret radiographs as opposed to creating radiographs via radiographic testing. It will prepare you for the cri certification exam, which is given at the end of each seminar week. I calculated that we have a total of about 0lf of weld. Its image on a radiograph is used to determine the radiographic quality level. A comparison of ultrasonics and radiography for weld inspection. This method consists of a sensitive radiographic film being placed under a specific component i. Weld metal rt film interpretation free download as pdf file. Jan 12, 2015 dentists are expected to have basic skills in interpreting any intraoral or extraoral images that might be used in dental practice. Nov 22, 2017 radiographic interpretation radiographs of welds radiographers weld interpretation reference agfa ndt radiography testing ultrasonic testing penetran testing mpi xfilm gamma ray. Radiographic interpretation is followed by sets of multiplechoice questions focused on key areas of radiograph. When it is not practical to use a singlewall technique, one of the following doublewall techniques shall be used. Study of radiographic linear indications and subsequent.
The transversal crack visible on the radiograph a, localised mostly in casting designation d for casting and 102 for welding, has been probably initiated by thermal cycle of welding. Castings are a product form that often receive radiographic inspection since many of the defects produced by the casting process are volumetric in nature, and are thus. The expert radiograph has as role to inspect each film in order to detect the presence of possible defects which he must then identify and measure. Radiographic interpretation radiographs of welds radiographers weld interpretation reference agfa ndt radiography testing ultrasonic testing penetran testing mpi xfilm gamma ray. The tanks are being constructed one after the other with the same welders.
B influence on techniques of geometry, size, surface condition, base. All of these steps make use of the radiographers visual acuity. The questions provide additional valuable guidance to the student. Multimedia training course providing training on radiography in welding with student feedback to reinforce learning. This course designed for personnel responsible for judging the quality of radiograph and reaching informed decisions regarding the identity and extent of the defects revealed. Penetrating radiation is passed through a solid object, in this case a weld rather that.
Guidebook for the fabrication of nondestructive testing. Certified radiographic interpreter american welding society. A comparison of ultrasonics and radiography for weld. Radiograph interpretation welds free download as pdf file. Radiographic interpreters must be thoroughly familiar with all aspects of the process of radiography, as well as the welding and casting process. Appropriate radiographic interpretation is used along with clinical information and other tests to formulate a differential diagnosis caravaggios the tooth puller. The quality of a radiograph is assessed using three factors density, contrast and definition or sharpness of the image. Radiographs in diagnosis diagnostic imaging is an integral part of the diagnostic process in clinical dentistry. Radiographic interpretation welding defects youtube. It appears in the radiograph as a dark defined continuous or intermittent line which may be straight or irregular. Examination radiographs and master reports for the industrial.
This technique has been accepted as an inspection method for welds since the 1940s. Radiograph of excessive penetration courtesy agfa ndt root concavity src sometimes called suckback. Interpretation of weld radiographs a multimedia training. Appears as a dark area along the centre of the weld. Walley universities space research association, huntsville, alabama a. All of these steps make use of the radiographers acuity. The reference radiographs are assigned levels, but there is significant similarity in the levels causing problems in interpretation. May 27, 2015 radiographic testing of welds and weld testing are necessary steps in any pipeline construction process to detect flaws and defects within welded materials.
Radiographic interpretation radiographic interpretation radiographs of welds radiographs of welds. Iridium192 xray selenium75 inspection of welding defects by radiography examination rt radiographers weld interpretation reference agfa ndt radiography testing ultrasonic testing penetran. The purpose of radiographic interpretation is to properly assess indications produced on radiographic media during the process of evaluating weldments or adjacent base metal. Radiograph of internal root concavity courtesy agfa ndt pdf created with pdffactory pro trial version. Radiograph interpretation welds in addition to producing high quality radiographs, the radiographer must also be skilled in radiographic interpretation. Radiographs are often obtained as part of a complete examination. Certnde guide radiographic interpretation 92702 introduction this guide describes a program for the qualification, training, and testing of individuals seeking certification as aws nde inspectors for radiographic interpretation of welds. It may also require the evaluator to prorate the radiograph of the area of interest of a part to the reference radiographs. May 31, 2017 iridium192 xray selenium75 inspection of welding defects by radiography examination rt radiographers weld interpretation reference agfa ndt radiography testing ultrasonic testing penetran. The source of the probing energy or probing medium must be suitable for the test object and for detecting the defect or discontinuity sought. It is the fourth in a series of computerbased training systems originally developed for inhouse. Awwa d10011 radiograph test location interpretation. The interpretation of a radiograph is accomplished in three steps, visualization, perception and integration of information received from the radiograph with that from other sources.