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

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Internal or root undercut is an erosion of the base metal next to the root of the weld. In the radiographic image it appears as a dark irregular line offset from the centerline of the weldment. Undercutting is not as straight edged as LOP because it does not follow a ground edge. Charlie Chong/ Fion Zhang
External or crown undercut is an erosion of the base metal next to the crown of the weld. In the radiograph, it appears as a dark irregular line along the outside edge of the weld area. Charlie Chong/ Fion Zhang
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Understandings NRT - Reading 1 Part
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NDT for Upstream Charlie Chong/ Fio
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NDT for Upstream Charlie Chong/ Fio
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Charlie Chong/ Fion Zhang Fion Zhan
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BOK NR- Neutron Radiographic Testin
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4. Interpretation/Evaluation • Im
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Charlie Chong/ Fion Zhang http://gr
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Charlie Chong/ Fion Zhang
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Chapter 6: Radio Isotope (Gamma) So
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Cobalt-60 Charlie Chong/ Fion Zhang
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Cobalt-60, 60 Co, is a synthetic ra
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Decay of Co-60 The decay scheme of
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γ-Ray Spectrum of Cobalt-60 Charli
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Isomers Nuclei can have the same ne
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Half-lives (example: Gd) Charlie Ch
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Advantages of gamma ray sources inc
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Radio Isotope - Th232 Half life: 1.
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Radio Isotope - Co60 Half life: 192
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12.7μm sensitive silver halide blu
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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 and 58: Approximate Corrections for Recipro
Page 59 and 60: Film Packaging Radiographic film ca
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: Internal concavity or suck back is
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 107 and 108: Charlie Chong/ Fion Zhang
Page 109 and 110: Shrinkage is a form of discontinuit
Page 111 and 112: Dendritic shrinkage is a distributi
Page 113 and 114: Cracks are thin (straight or jagged
Page 115 and 116: Core shift shows itself as a variat
Page 117 and 118: 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
Page 127 and 128: 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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