Understanding API ICP653 Reading 7-Worksheet-04 Part1

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Common approach for settlement survey: a. Obtain transit survey from the correct number of evenly spaced points. b. Determine magnitude of uniform and rigid body tilt from each point on tank periphery. c. Develop a graphic line point representation of the involved data. NOTE: Develop values (showing elevation differences) by comparing transit measurement readings by use of provided decimal chart. A stress analysis method is now included in this paragraph. B.2.2.5 Refer to B.3.2 for method of determining acceptable settlement condition or values. Charlie Chong/ Fion Zhang
B.2.3 Edge settlement B.2.3.1 Occurs when tank shell settles sharply around the periphery, resulting in deformation of the bottom plate near the shell junction. (See Fig. B-4 for pictorial view). B.2.5 Localized Bottom Settlement (Remote from Shell) B.2.5.1 Depressions/bulged that occur in a random matter, remote from shell. B.2.5.2 Acceptability dependent upon: a. Localized bottom plate stresses. b. Design/quality of lap welds. c. Void severity below the bottom plate. NOTES: 1. Not normally seen as extreme problem. 2. When occurring, normally associated with new tank where no or insufficient load bearing soil test borings have been made. 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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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
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Page 183 and 184: 12.1.2 Shell Penetrations 12.1.2.1
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Page 187 and 188: 12.2.1.4 Each butt-weld annular pla
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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: B.2.2.3 Differential Settlement (ou
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 and 216: Q7. What primary factor determines
Page 217 and 218: Q11. What type of contour cut (if a
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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Understanding API ICP653 Reading 7-Worksheet-04 Part1

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