Understanding API ICP653 Reading 7-Worksheet-04 Part1

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Practice Problem A 190' diameter tank has a pit that measures 5/16" deep in the first course, what is the min t, if the fill is 42 feet and the specific gravity is 0.6? (The pit is not in a weld seam or HAZ.) The material is unknown. S = Table 4-1 E = Original joint efficiency for the tank. Use Table 4-2 if original E is unknown. E = 1.0 when evaluating the retirement thickness in a corroded plate, when away from welds or joints by at least the greater of one inch or twice the plate thickness. tmin = 2.6 (H-1) DG/SE = 2.6(41)190x 0.6/ (23600) = 0.515” Charlie Chong/ Fion Zhang
Maximum Allowable Fill Height Calculation (4.3.3.2) H t = S t E∙ t/(2.6D) + 1 H t = Height from the bottom of the shell course under consideration to the hydrostatic test height when evaluating an entire shell course in ft; or = Height from the bottom of the length, L, (see 4.3.2.1) for the most severely thinned area in each shell course to the hydrostatic test height in ft; or = Height from the lowest point within any other location of interest to the hydrostatic test height in ft. S t = Maximum allowable hydrostatic test stress in lbf∙in. 2 ; use the smaller of 0.88Y or 0.472T for bottom and second courses; use the smaller of 0.9Y or 0.519T for all other courses. Charlie Chong/ Fion Zhang
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Understandings API ICP653 Reading 7
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Page 9 and 10: API 653 Exam Administration -- Publ
Page 11 and 12: • API Recommended Practice 575, I
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Page 19 and 20: 闭门练功 Charlie Chong/ Fion
Page 21 and 22: 1.1 General 1.1.1 This standard cov
Page 23 and 24: 1.4 Safe Working Practices Safety p
Page 25 and 26: c. An owner or operator of one or m
Page 27 and 28: 3.9 critical zone: The portion of t
Page 29 and 30: 3.16 repair organization: An organi
Page 31 and 32: organizations Charlie Chong/ Fion Z
Page 33 and 34: 3.21 as-built standard: The standar
Page 35 and 36: 3.23 major alteration or major repa
Page 37 and 38: g. Removing and replacing part of t
Page 39 and 40: SECTION 4 - SUITABILITY FOR SERVICE
Page 41 and 42: 4.2 Tank Roof Evaluation (General)
Page 43 and 44: 4.2.4 Change of Service 4.2.4.1 Int
Page 45 and 46: 4.3.1.3 Shell corrosion occurs in m
Page 47 and 48: EXAMPLE: A tank 38 feet tall, 150 f
Page 49 and 50: 4.3.3 Minimum Thickness Calculation
Page 51 and 52: G = Highest specific gravity of the
Page 53: Sample problem for minimum thicknes
Page 57 and 58: Sample problem for maximum allowabl
Page 59 and 60: Joint Efficiency for the plate For
Page 61 and 62: For Riveted Tank E is 1.0 for shell
Page 63 and 64: Table 4.3—Joint Efficiencies for
Page 65 and 66: B. Tank Shells 1. See prior comment
Page 67 and 68: 4.3.6 Flaws cracks and laminations
Page 69 and 70: 4.4 Tank Bottom Evaluation 4.4.1 Ge
Page 71 and 72: 4.4.6 Bottom Measurements Methods (
Page 73 and 74: 4.4.7.4 Critical zone thickness is
Page 75 and 76: 4.4.8 Minimum "t" - Annular Plate R
Page 77 and 78: Quiz: Annular Plate t min Annular p
Page 79 and 80: API653: Table 4.5—Annular Bottom
Page 81 and 82: API653: Table 4.4—Bottom Plate Mi
Page 83 and 84: 4.5.2 and 4.5.3 General a. For repa
Page 85 and 86: 5.2.1 Reported conditions involving
Page 87 and 88: 5.3 Assessment Procedure 5.3.1 - 5.
Page 89 and 90: 6.2.2 The interval between inspecti
Page 91 and 92: 6.3.3 In-service UT "t" measurement
Page 93 and 94: API651: 11.3 Cathodic Protection Su
Page 95 and 96: CP Survey 11.3 Cathodic Protection
Page 97 and 98: 6.4.2 Inspection Intervals 6.4.2.1
Page 99 and 100: 6.4.2.1.2 As an alternative to esta
Page 101 and 102: 6.4.2.2 Subsequent Internal Inspect
Page 103 and 104: Table 4.4—Bottom Plate Minimum Th
Page 105 and 106:
Quiz: Critical Zone t min t minimum
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Quiz: Bottom Plate excluding Critic
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6.8.2 Construction Records May incl
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6.9 Reports 6.9.1 Recommended repai
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113 Inspection Frequency Considerat
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115 Internal inspection is required
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API 653 Initial Inspection Interval
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119 API 653 Initial Inspection Inte
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125 API 653 Subsequent Inspection I
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129 Steps for corrosion rate calcul
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131 Finally ‐ Calculate Subsequen
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API 653 Subsequent Inspection Inter
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Page 139 and 140:
139 Factors to Consider in a RBI As
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141 RBI Inspection • RBI Assessme
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143 Comparison Direct Measurements
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145 Questions ?
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7.3.1.2 If plates are not identifie
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8.5 Shell Penetrations 8.5.1 New/re
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9.2 Removal and Replacement - Shell
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9.2.3 Weld Joint Design 9.2.3.1 Rep
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9.3.1.7 Maximum size of lap patch p
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9.3.3 Lapped patch plates may be us
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9.7 Repair of Shell Penetrations 9.
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9.10 Repair of Tank Bottoms (Defini
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9.10.2.2 New bearing plates are req
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9.10.3.1 Additional Welded-on Plate
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9.13 Repair/Replacement of Floating
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9.14.5 Installation Procedure 9.14.
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Hot Tapping Charlie Chong/ Fion Zha
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10.3.2 Bottoms 10.3.2.1 Deseam lapw
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10.3.5 Piece Marking 10.3.5.1 Shell
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10.4.2.3 Specific welding notes: a.
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10.4.3 Bottoms 10.4.3.2 Weld shell
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SECTION 11 - WELDING 11.1 Welding Q
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12.1.2 Shell Penetrations 12.1.2.1
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12.1.6 Shell-to Bottom 12.1.6.1 Joi
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12.2.1.4 Each butt-weld annular pla
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12.3.2.2 Shell Repair 12.3.2.2.1 We
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12.5 Measured Settlement (During Hy
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SECTION 13 - MARKING AND RECORD KEE
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13.3 Certification Documentation of
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ANS: ANS: Charlie Chong/ Fion Zhang
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B.2.2.3 Differential Settlement (ou
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B.2.3 Edge settlement B.2.3.1 Occur
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APPENDIX C CHECKLISTS FOR TANK INSP
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APPENDIX E TECHNICAL INQUIRIES This
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G.2.6 qualification test: The demon
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G.3 An explanation of Tank Bottom E
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API 653 CODE QUIZ Charlie Chong/ Fi
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Q3. A condition that exists when it
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Q7. What primary factor determines
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Q11. What type of contour cut (if a
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Q15. API-653 (Section 12) requires
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Q16. Calculate the minimum thicknes
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Q19. A bulge is found on the tank f
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Q16. d (1/2") [Paragraph 4.3.3 page
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Section 2 650 Summary 2007 Charlie
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Charlie Chong/ Fion Zhang
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Good Luck! Charlie Chong/ Fion Zhan
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Understanding API ICP653 Reading 7-Worksheet-04 Part1

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