Ideal for those who already have a basic understanding of the techniques of radiographic interpretation and would like intensive instruction to improve their knowledge and increase their experience in preparation for a recertification examination. Radiography Testing Presentation 1. Practical training and examination. Amirkabir University of Technology • ELECTRICAL 236, Chattahoochee Technical College • RADIOGRAPHY 1065, Srm Institute Of Science & Technology • ME 2703, University of Malaysia, Pahang • FIST 1000, Srm Institute Of Science & Technology • ME MISC, Copyright © 2020. Radiographic film interpretation Radiographic testing is anon-destructive testing of components and assemblies that is based on differential absorption of penetrating radiation- either electromagnetic radiation of very short wave-lengths or particulate radiation by the part or test piece being tested. Radiography today is one of the most important, most versatile, of all the nondestructive test, methods used by modern industry. Radiographic Testing Page 3 Introduction: BASIC RADIOGRAPHIC TESTING Radiographic testing usually requires exposing film to X rays or gamma rays that have penetrated a specimen, processing the exposed film, and interpreting the resultant radiograph. determined. Tungsten is a brittle and inherently dense material used in the electrode in tungsten inert gas welding. The ability of an individual to detect discontinuities in radiography is also affected by the lighting condition in the place of viewing, and the experience level for recognizing various features in the image. Evidence of a discontinuity that requires interpretation to determine its significance radiographic film interpretation (welds)-pcn Course Content Weld defects and their components; viewing conditions; identification of radiographs; spurious indications and film artefacts; appreciation of radiographic principles and parameters of interpretation; standards for radiographic practice, interpretation tutorial; acceptance criteria. Radiographic Film Interpretation: Refresher / Recertification. Porosity is the result of gas entrapment in the solidifying metal. The appearance on a radiograph is a dark area with well-defined, straight edges that follows the land or root face down the center of the weldment. Film radiography, which utilises either X-ray or gamma radiation generated from a tube or from an isotope of Iridium-192, Selenium-75 or Cobalt-60, has been the most widely used application for volumetric inspections. • In radiographic testing, the part to be inspected is placed between the radiation source and a piece of radiation sensitive film. Cracks will appear as jagged and often very faint irregular lines. •The radiation source can either be an X-ray machine or a radioactive source. Cold lap is a condition where the weld filler metal does not properly fuse with the base metal or the previous weld pass material (interpass cold lap). Presentation on Radiography Testing By Abhishek A V [email protected] 2. The moisture turns into a gas when heated and becomes trapped in the weld during the welding process. The appearance on a radiograph is a localized, lighter area in the weld. Oxide inclusions are less dense than the surrounding material and, therefore, appear as dark irregularly shaped discontinuities in the radiograph. Radiographic technique. The AWS program will provide for a portable, individual certification, independent of employer. This is the result of gas attempting to escape while the metal is still in a liquid state and is called wormhole porosity. Interpretation of radiographs takes place in three basic steps: (1) detection, (2) interpretation, and (3) evaluation. Radiography is split into two main categories n Radiographic Testing n Radiographic Interpretation The radiographic testing course is for NDT personnel who execute the practical Whiskers are short lengths of weld electrode wire, visible on the top or bottom surface of the weld or contained within the weld. Function of a qualified interpreter : Radiographic quality: Analysis of R.T technique and development regarding procedures. There are both physical and economic limitations to the use of radiographic testing. Knowledge is Power and understanding the RT Process for the proper interpretation of radiographs can mean the difference between acceptable and catastrophic results. In the radiographic image it appears as a dark irregular line offset from the centerline of the weldment. This will help prepare you for the Level II or III exams and work situations. Similarly, any specimen which does not lend itself readily to two-side accessibility cannot be inspected. inorganic materials, and to solids, liquids, and even gases. 3.1.3 Direction of interest – the orientation on the radiographic film(s) specified by the purchaser for the assessment of indication length. Porosity can take many shapes on a radiograph but often appears as dark round or irregular spots or specks appearing singularly, in clusters, or in rows. If improper welding procedures are used, tungsten may be entrapped in the weld. The applicable code or standard. Often lumps of metal sag through the weld, creating a thick globular condition on the back of the weld. Radiographic quality assessment; Specific Theory Application of the Method and use of Codes, Specifications and Procedures applicable to Lavender International NDT Consultancy Services Ltd, including the relevant control checks. Visual acuity is the ability to resolve a spatial pattern in an image. Type of weld and joint preparation. Objects radiographed range in size from micro-, miniature electronic parts to mammoth missile components; in product composition through, virtually every known material; and in manufactured form over an enormously wide variety of, castings, weldments, and assemblies. Cluster porosity appear just like regular porosity in the radiograph but the indications will be grouped close together. Radiographic examination has been applied to organic and. to detect anomalies in materials and human bodies. The following discontinuities are typical of all types of welding. Course Hero, Inc. All porosity is a void in the material and it will have a higher radiographic density than the surrounding area. Tungsten inclusions. Weld Defect 3 – Slag inclusion AXIS Inspection Group Ltd. Kalkars NDT Services RADIOGRAPHIC FILM INTERPRETATION. Radiograph interpretation welds. Interpretation of radiographs takes place in three basic steps: (1) detection, (2) interpretation, and (3) evaluation. Industrial radiography is tremendously versatile. There are many, variables in these procedures and successful completion of any test is dependent upon. Appearance on radiograph: usually appears as a dark line or lines oriented in the direction of the weld seam along the weld preparation or joining area. •The part will stop some of the radiation where thicker and … These interruptions may occur in the base metal, weld material or "heat affected" zones. External or crown undercut is an erosion of the base metal next to the crown of the weld. These globs of metal are referred to as icicles.   Terms. It is very easy to determine by radiograph if the weld has inadequate reinforcement, because the image density in the area of suspected inadequacy will be higher (darker) than the image density of the surrounding base material. Provides a permanent visual-image record of the test specimen on film when desired. 3.1.1 Cracks – an indication on a radiographic film with a length that exceeds 10 times the width. a) Butt welded joints surfaces shall be sufficiently free from coarse ripples ,grooves , overlaps and abrupt ridges and valleys to permit proper interpretation of radiographic and the required non-destructive examinations. Employing highly penetrating x-rays, gamma rays, and other, forms of radiation that do not damage the part itself, radiography provides a permanent visible film, record of internal conditions, containing the basic information by which soundness can be. The following discontinuities are most commonly found in GMAW welds. The difference in density is caused by the difference in material thickness. 13. Welcome to our Radiographic Film Interpretation course. These discontinuities occur in most metals welded by the process, including aluminum and stainless steels. Internal concavity or suck back is a condition where the weld metal has contracted as it cools and has been drawn up into the root of the weld. On a radiograph they appear as light, "wire like" indications. This video will give greater knowledge of Radiographic Film Defects Interpretation. After having acquired the knowledge and skills to safely carry out radiographic tests, this course teaches you how to interpret the resulting film after it has been developed and determine whether the test piece meets the applicable standard. Introduction to Radiography 2. radiographic theory, procedures, weld and adjacent base metal defect recognition, radiographic processing, handling, storage, and code requirements relating to radiographic acceptance criteria are essential to ensuring the competence of individuals engaged in radiographic interpretation. Section 1 Class guideline — DNVGL-CG-0051. Defect discernibility and image quality 97 11.1 Unsharpness 97 Geometric unsharpness Inherent (film) unsharpness Cert-NDE Guide Radiographic Interpretation -9/27/02 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. Oxide inclusions are usually visible on the surface of material being welded (especially aluminum). Radiographic Testing (RT) is widely used in industries, at airport for security checks, medical applications etc. Welding seam Radiography interpretation. Interpretation of weld radiographs facebook. Radiographic Testing Film Interpretation Paper indication of both the radiograph and the test piece, clarity of the penetrameter, suitability of radiographic techniques, adequacy of coverage and precision and uniformity of film processing all combine to produce a radiograph that is a representative image of the part being inspected. PDF | On Jan 1, 2009, I.J. Radiography Testing Presentation SlideShare. Sometimes, porosity is elongated and may appear to have a tail. Discontinuities, which do not meet the requirements of the codes or specifications used to invoke and control an inspection, are referred to as defects. It is one of the most objectionable weld discontinuities. it explain the defect of the weld metal and area. Radiographic Testing Film Interpretation. Radiographic and ultrasonic testing of welds. In the 1980s decade alone, the evidence from millions of film records, or radiographs, has enabled industry to assure product reliability; has provided the informational means of. Why attend this course? A visual inspection will easily determine if the weld reinforcement is in excess of that specified by the engineering requirements. Course Outline: 1. Slag inclusions are nonmetallic solid material entrapped in weld metal or between weld and base metal. Radiographic Testing (RT) is one of the most fundamental volumetric-testing methods performed in industry and radiography NDT. On a radiograph it looks similar to a lack of penetration but the line has irregular edges and it is often quite wide in the center of the weld image. PCN Radiographic Film Interpretation Material.pdf - PCN RADI OGRAPHI C FI LM I NTERPRETATI ON RTFI MATERI AL www.itseasyforu.com CONTENTS S.No 1 2 3 4 5, Principle of Radiographic Technique ( Filters, screens, Film), Special Processing Techniques and Film Processing, Radiographic testing usually requires exposing film to X rays or gamma rays that have penetrated, a specimen, processing the exposed film, and interpreting the resultant radiograph. Lack of penetration allows a natural stress riser from which a crack may propagate. We can provide Radiographic testing training suitable for PCN GEN – BS EN ISO 9712 Levels 1, 2, and 3, ASNT Level 3. DURATION. Incomplete penetration (IP) or lack of penetration (LOP) occurs when the weld metal fails to penetrate the joint. d. Discloses fabrication errors and often indicates necessary corrective action. In addition to producing high quality radiographs, the radiographer must also be skilled in radiographic interpretation. NDT-E (economy) film processor 10.6 Checking the developing process and film archiving properties 93 PMC-strips to check the developing process Thiosulphate-test to check the film archival properties 10.7 Storage of exposed films 95 11. There are many variables in these procedures and successful completion of any test is dependent upon understanding and control of the variables. WHAT IS RADIOGRAPHIC TESTING PDF DOWNLOAD WHAT IS RADIOGRAPHIC TESTING PDF READ ONLINE PDF Drive is your search engine… 3.1.2 Area of interest – the area of the casting required to be radiographed and evaluated. Das published Radiographic film | Find, read and cite all the research you need on ResearchGate Radiographic interpreter asnt level ii ikbal m yos. 20 Radiographìc Film Interpretation of Weldments - Student Manual - 1996 Radìographic examination performed in accordance with a general C0de(s) or Specificafioms) Development of a specific project o radiographic examìnation e Specific _ Radio graphic T echrii a ues Figure G-14. Radiographic Sensitivity in Industrial Radiographic Testing With X-Ray Films By: Tee Kim-Tsew (Technical Manager, Lott Inspection Sdn. Testing Techniques (TECDOC-628/Rev.2) [5], the ISO 9712:2005 [1], ISO 9712:2012 [2] and EN473:2008 [3]. The TIG method of welding produces a clean homogeneous weld which when radiographed is easily interpreted. Cracks can sometimes appear as "tails" on inclusions or porosity. 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