Understanding NRT- Reading 1- 2 of 2- Radiogaphic Testing A

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The table gives a rough estimate of the deviations from the rules given in the foregoing section that are necessitated by failure of the reciprocity law for exposures with fluorescent intensifying screens. It must be emphasized that the figures in column 3 are only approximate. The exact values of the factors vary widely with the intensity of the fluorescent light and with the density of the radiograph. When distance is held constant, the milliamperage may be increased or decreased by a factor of 2, and the new exposure time may be calculated by the method shown in "Time-Distance Relation", without introducing errors caused by failure of the reciprocity law, which are serious in practice. Charlie Chong/ Fion Zhang http://webstag.kodak.cz/US/en/business/aim/industrial/ndt/literature/radiography/07.shtml#ccurves
Film Packaging Radiographic film can be purchased in a number of different packaging options. The most basic form is as individual sheets in a box. In preparation for use, each sheet must be loaded into a cassette or film holder in the darkroom to protect it from exposure to light. The sheet are available in a variety of sizes and can be purchased with or without interleaving paper. Interleaved packages have a layer of paper that separates each piece of film. The interleaving paper is removed before the film is loaded into the film holder. Many users find the interleaving paper useful in separating the sheets of film and offer some protection against scratches and dirt during handling. Industrial x-ray films are also available in a form in which each sheet is enclosed in a light-tight envelope. The film can be exposed from either side without removing it from the protective packaging. A rip strip makes it easy to remove the film in the darkroom for processing. This form of packaging has the advantage of eliminating the process of loading the film holders in the darkroom. The film is completely protected from finger marks and dirt until the time the film is removed from the envelope for processing. Charlie Chong/ Fion Zhang
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Understandings NRT - Reading 1 Part
Page 3 and 4:
NDT for Upstream Charlie Chong/ Fio
Page 5 and 6:
NDT for Upstream Charlie Chong/ Fio
Page 7 and 8: Charlie Chong/ Fion Zhang Fion Zhan
Page 9 and 10: BOK NR- Neutron Radiographic Testin
Page 11 and 12: 4. Interpretation/Evaluation • Im
Page 13 and 14: Charlie Chong/ Fion Zhang http://gr
Page 15 and 16: Charlie Chong/ Fion Zhang
Page 19 and 20: Chapter 6: Radio Isotope (Gamma) So
Page 21 and 22: Cobalt-60 Charlie Chong/ Fion Zhang
Page 23 and 24: Cobalt-60, 60 Co, is a synthetic ra
Page 25 and 26: Decay of Co-60 The decay scheme of
Page 27 and 28: γ-Ray Spectrum of Cobalt-60 Charli
Page 29 and 30: Isomers Nuclei can have the same ne
Page 31 and 32: Half-lives (example: Gd) Charlie Ch
Page 33 and 34: Advantages of gamma ray sources inc
Page 35 and 36: Radio Isotope - Th232 Half life: 1.
Page 37 and 38: Radio Isotope - Co60 Half life: 192
Page 39 and 40: 12.7μm sensitive silver halide blu
Page 45 and 46: Arithmetic of Exposure RELATIONS OF
Page 47 and 48: Milliamperage-Distance Relation The
Page 49 and 50: When very low kilovoltages, say 20
Page 51 and 52: Tabular Solution of Milliamperage-T
Page 53 and 54: Milliamperage-Time and Distance Rel
Page 55 and 56: THE RECIPROCITY LAW In the sections
Page 57: Approximate Corrections for Recipro
Page 61 and 62: Film Handling X-ray film should alw
Page 63 and 64: Subject contrast is determined by t
Page 65 and 66: Definition Radiographic definition
Page 67 and 68: Film should be located in a light,
Page 69 and 70: Sensitometric checks may be carried
Page 71 and 72: Film viewers should be clean and in
Page 73 and 74: When viewing a particular region of
Page 75 and 76: Radiographic Contrast Charlie Chong
Page 77 and 78: In the example on the right, the sa
Page 79 and 80: Chapter 12: Radiographic Density Fi
Page 81 and 82: Chapter 13: Controlling Radiographi
Page 83 and 84: Hole-Type IQIs ASTM Standard E1025
Page 85 and 86: Wire Penetrameters ASTM Standard E7
Page 87 and 88: Chapter 14: Exposure Calculations P
Page 89 and 90: General Welding Discontinuities The
Page 91 and 92: Cluster porosity is caused when flu
Page 93 and 94: Incomplete penetration (IP) or lack
Page 95 and 96: Internal concavity or suck back is
Page 97 and 98: External or crown undercut is an er
Page 99 and 100: Inadequate weld reinforcement is an
Page 101 and 102: Cracks can be detected in a radiogr
Page 103 and 104: Oxide inclusions are usually visibl
Page 105 and 106: Chapter 16: Radiograph Interpretati
Page 109 and 110:
Shrinkage is a form of discontinuit
Page 111 and 112:
Dendritic shrinkage is a distributi
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Cracks are thin (straight or jagged
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Core shift shows itself as a variat
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Mottling is a radiographic indicati
Page 119 and 120:
Incomplete penetration, as the name
Page 121 and 122:
Root edge condition shows the penet
Page 123 and 124:
Real-time radiography is a well-est
Page 125 and 126:
Charlie Chong/ Fion Zhang
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Read More: https://www.nde-ed.org/T
Page 129:
Good Luck! Charlie Chong/ Fion Zhan
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Understanding NRT- Reading 1- 2 of 2- Radiogaphic Testing A

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