Understanding API ICP653 Reading 7-Worksheet-04 Part1

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Q9. Which of the areas described below are considered to be the "critical zone" involving tank bottom repair? a. Within the annular ring, within 12" of shell, or within 12" of inside edge of annular plate ring. b. Any area where 3–plate laps are located c. Within 36" (measured vertically) from any shell penetration above. d. Within 3" from the shell on the bottom plates ANS: D Q10. Select the minimum number of "t" measurements required (along the circumference of any proposed "hot-tap" nozzle location): a. One (1) on horizontal centerline (3" from edge) on each side of proposed shell opening cut. b. Four (4) c. Eight (8) d. Establishment of both a minimum and average "t" over the entire nozzle installation area. ANS: B Charlie Chong/ Fion Zhang
Q11. What type of contour cut (if any) and what degree of bevel (if any) is required on the nozzle "barrel" end that is to be joined to shell during a "hottap". a. No contour cut required, 30° outside bevel. b. No contour cut required, 45° outside bevel. c. Cut to shell contour and outside beveled for full penetration attachment weld. d. No contour cut required. 1/8" corner radius (minimum). ANS: C Q12. When reconstructing tank shells with a material "t" exceeding 1.50", what minimum pre-heat is specified? a. No preheat required, if air temperature exceeds 70°F. b. 200°F. c. 225°F. d. 300°F. ANS: B 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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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
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Table 4.4—Bottom Plate Minimum Th
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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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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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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
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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
Page 205 and 206: APPENDIX E TECHNICAL INQUIRIES This
Page 207 and 208: G.2.6 qualification test: The demon
Page 209 and 210: G.3 An explanation of Tank Bottom E
Page 211 and 212: API 653 CODE QUIZ Charlie Chong/ Fi
Page 213 and 214: Q3. A condition that exists when it
Page 215: Q7. What primary factor determines
Page 219 and 220: Q15. API-653 (Section 12) requires
Page 221 and 222: Q16. Calculate the minimum thicknes
Page 223 and 224: Q19. A bulge is found on the tank f
Page 225 and 226: Q16. d (1/2") [Paragraph 4.3.3 page
Page 227 and 228: Section 2 650 Summary 2007 Charlie
Page 229 and 230: Charlie Chong/ Fion Zhang
Page 231 and 232: Good Luck! Charlie Chong/ Fion Zhan
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