Understanding API ICP653 Reading 7-Worksheet-04 Part1

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9.3.1 Lapped patch shell repairs are now an acceptable form of repair, <strong>API</strong> 653, Second Edition, Addenda 1. Existing patch plates may be evaluated to this Standard. 9.3.1.2 Lap patches may not be used on plate thicker than 1/2“ or to replace door sheets. 9.3.1.3 Lap patch plates are not to be thicker than 1/2” or thinner than 3/16”. 9.3.1.4 All lap patch plates may be circular, oblong, square, rectangular or meet the nozzle reinforcing plate shapes of <strong>API</strong> 650. 9.3.1.5 Lap patch plates may cross welds. See figure 9-1 for weld spacing details. 9.3.1.6 Lap patch plates may extend to and intersect with the external shellto-bottom joint. Internal lap patches shall have 6” toe-to-toe weld clearance between the patch and the shell-to-bottom weld. Charlie Chong/ Fion Zhang
9.3.1.7 Maximum size of lap patch plates is 48” x 72”, (4’ x 6’) minimum 4”. 9.3.1.8 Shell openings are not allowed within a lapped patch repair. 9.3.1.9 UT required in the areas to be welded, searching for plate defects and remaining thickness. 9.3.1.10 Repair plates shall not be lapped onto lap-welded shell seams, riveted shell seams, other lapped patch repair plates, distorted areas, or unrepaired cracks or defects. Charlie Chong/ Fion Zhang
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Understandings API ICP653 Reading 7
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Charlie Chong/ Fion Zhang
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Ctrl + Shift + S = save a copy Ctrl
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Charlie Chong/ Fion Zhang Fion Zhan
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API 653 Exam Administration -- Publ
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• API Recommended Practice 575, I
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Charlie Chong/ Fion Zhang http://gr
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闭门练功 Charlie Chong/ Fion
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1.1 General 1.1.1 This standard cov
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1.4 Safe Working Practices Safety p
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c. An owner or operator of one or m
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3.9 critical zone: The portion of t
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3.16 repair organization: An organi
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organizations Charlie Chong/ Fion Z
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3.21 as-built standard: The standar
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3.23 major alteration or major repa
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g. Removing and replacing part of t
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SECTION 4 - SUITABILITY FOR SERVICE
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4.2 Tank Roof Evaluation (General)
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4.2.4 Change of Service 4.2.4.1 Int
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4.3.1.3 Shell corrosion occurs in m
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EXAMPLE: A tank 38 feet tall, 150 f
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4.3.3 Minimum Thickness Calculation
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G = Highest specific gravity of the
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Sample problem for minimum thicknes
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Maximum Allowable Fill Height Calcu
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Sample problem for maximum allowabl
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Joint Efficiency for the plate For
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For Riveted Tank E is 1.0 for shell
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Table 4.3—Joint Efficiencies for
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B. Tank Shells 1. See prior comment
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4.3.6 Flaws cracks and laminations
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4.4 Tank Bottom Evaluation 4.4.1 Ge
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4.4.6 Bottom Measurements Methods (
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4.4.7.4 Critical zone thickness is
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4.4.8 Minimum "t" - Annular Plate R
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Quiz: Annular Plate t min Annular p
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API653: Table 4.5—Annular Bottom
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API653: Table 4.4—Bottom Plate Mi
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4.5.2 and 4.5.3 General a. For repa
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5.2.1 Reported conditions involving
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5.3 Assessment Procedure 5.3.1 - 5.
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6.2.2 The interval between inspecti
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6.3.3 In-service UT "t" measurement
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API651: 11.3 Cathodic Protection Su
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CP Survey 11.3 Cathodic Protection
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6.4.2 Inspection Intervals 6.4.2.1
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6.4.2.1.2 As an alternative to esta
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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
Page 107 and 108: Quiz: Bottom Plate excluding Critic
Page 109 and 110: 6.8.2 Construction Records May incl
Page 111 and 112: 6.9 Reports 6.9.1 Recommended repai
Page 113 and 114: 113 Inspection Frequency Considerat
Page 115 and 116: 115 Internal inspection is required
Page 117 and 118: API 653 Initial Inspection Interval
Page 119 and 120: 119 API 653 Initial Inspection Inte
Page 125 and 126: 125 API 653 Subsequent Inspection I
Page 129 and 130: 129 Steps for corrosion rate calcul
Page 131 and 132: 131 Finally ‐ Calculate Subsequen
Page 133 and 134: API 653 Subsequent Inspection Inter
Page 139 and 140: 139 Factors to Consider in a RBI As
Page 141 and 142: 141 RBI Inspection • RBI Assessme
Page 143 and 144: 143 Comparison Direct Measurements
Page 145 and 146: 145 Questions ?
Page 147 and 148: 7.3.1.2 If plates are not identifie
Page 149 and 150: 8.5 Shell Penetrations 8.5.1 New/re
Page 151 and 152: 9.2 Removal and Replacement - Shell
Page 153: 9.2.3 Weld Joint Design 9.2.3.1 Rep
Page 157 and 158: 9.3.3 Lapped patch plates may be us
Page 159 and 160: 9.7 Repair of Shell Penetrations 9.
Page 161 and 162: 9.10 Repair of Tank Bottoms (Defini
Page 163 and 164: 9.10.2.2 New bearing plates are req
Page 165 and 166: 9.10.3.1 Additional Welded-on Plate
Page 167 and 168: 9.13 Repair/Replacement of Floating
Page 169 and 170: 9.14.5 Installation Procedure 9.14.
Page 171 and 172: Hot Tapping Charlie Chong/ Fion Zha
Page 173 and 174: 10.3.2 Bottoms 10.3.2.1 Deseam lapw
Page 175 and 176: 10.3.5 Piece Marking 10.3.5.1 Shell
Page 177 and 178: 10.4.2.3 Specific welding notes: a.
Page 179 and 180: 10.4.3 Bottoms 10.4.3.2 Weld shell
Page 181 and 182: SECTION 11 - WELDING 11.1 Welding Q
Page 183 and 184: 12.1.2 Shell Penetrations 12.1.2.1
Page 185 and 186: 12.1.6 Shell-to Bottom 12.1.6.1 Joi
Page 187 and 188: 12.2.1.4 Each butt-weld annular pla
Page 189 and 190: 12.3.2.2 Shell Repair 12.3.2.2.1 We
Page 191 and 192: 12.5 Measured Settlement (During Hy
Page 193 and 194: SECTION 13 - MARKING AND RECORD KEE
Page 195 and 196: 13.3 Certification Documentation of
Page 197 and 198: ANS: ANS: Charlie Chong/ Fion Zhang
Page 199 and 200: B.2.2.3 Differential Settlement (ou
Page 201 and 202: B.2.3 Edge settlement B.2.3.1 Occur
Page 203 and 204: 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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Good Luck! Charlie Chong/ Fion Zhan
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