ASME Code Case 181

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(g) Qualification records of certified personnel shall be approved by theowner’s Inspector per para. 342.1.(h) In addition, personnel who acquire and analyze UT data shall be qualifiedand certified in accordance with (f) above and shall be trained using theequipment in (d) above, and participate in the demonstration of (c) above.Charlie Chong
(i) Data analysis and acceptance criteria shall be as follows:(1) Data Analysis Criteria. Reflectors exceeding the limits in either (a) or(b) below, as applicable, shall be investigated to determine whether theindication originates from a flaw or is a geometric indication inaccordance with para. (i) (2 ) below. When a reflector is determined tobe a flaw, it shall be evaluated for acceptance in accordance with para.(i)(4), Flaw Evaluation and Acceptance Criteria.(a) For amplitude-based techniques, the location, amplitude, andextent of all reflectors that produce a response greater than 20% ofthe reference level shall be investigated.Charlie Chong
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
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Page 13 and 14: Charlie ChongThe qualification bloc
Page 15 and 16: T-434.1.2 Material.(a) Similar Meta
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
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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 and 48: 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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