ASME Code Case 181

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Charlie ChongThe examination area shall include the volume of the weld, plus the lesser of25mm (1.0 in.) or t of adjacent base metal. Alternatively, the examinationvolume may be reduced to include the actual heat affected zone (HAZ) plus6mm (0.25 in.) of base material beyond the heat affected zone on each sideof the weld, provided the extent of the weld HAZ is measured anddocumented.
Charlie Chong5) Data RecordingData shall be recorded in theunprocessed form with no thresholding.The data record shall include thecomplete examination area as specifiedin (4)(b) above.
Page 1 and 2: ASME Code Case on Use of Alternativ
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Page 5 and 6: Charlie ChongB31 CASE 181-1CASES OF
Page 7 and 8: ASME B31.3344.6 Ultrasonic Examinat
Page 9 and 10: 344.6.2 Acceptance Criteria. A line
Page 11 and 12: (c) The ultrasonic examination shal
Page 13 and 14: Charlie ChongThe qualification bloc
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Page 17 and 18: Flaw size shall be no larger than t
Page 19 and 20: Charlie ChongGENERAL NOTES:(a)t = t
Page 21 and 22: Charlie ChongTABLE 2FLAW ACCEPTANCE
Page 23 and 24: Charlie Chong(d) The ultrasonic exa
Page 25 and 26: Charlie Chong(e) Data is recorded i
Page 27 and 28: (i) Data analysis and acceptance cr
Page 29 and 30: Charlie Chong(2) Geometric. Ultraso
Page 31 and 32: Charlie Chong(c) Alternatively, oth
Page 33 and 34: (b) Multiple Flaws(1) Discontinuous
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Page 39 and 40: Charlie Chong(d) With the owner’s
Page 41 and 42: ASME B31.1- 346 RECORDS346.2 Respon
Page 43 and 44: Charlie ChongB31 Case 181-2Original
Page 45 and 46: 344.6.2 Acceptance Criteria. A line
Page 47: Charlie Chong4) Examinationa)The in
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Charlie ChongStored valves shall be
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(b) Category M Fluid Service: a flu
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1.0 Valve BodyThe valve body, somet
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5 Valve Certification and Retesting
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Charlie Chong/ Fion Zhang
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Charlie Chong/ Fion Zhang
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ASME Code Case 181

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