Understanding API ICP653 Reading 7-Worksheet-04 Part1

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9.14.2 Hot Tap Procedure Requirements a. Use customer/owner developed-documented procedure. b. If no documentation is available, <strong>API</strong> Pub. 2201 applies. 9.14.3 Preparatory Work 9.14.3.1 Minimum spacing in any direction (toe-to-toe of welds) between the hot tap and adjacent nozzles shall be equivalent to the square root of RT (where "R" is tank shell radius, in inches, and "T" is the shell plate "t", in inches. √(RT) 9.14.3.2 Shell plate "t" shall be taken in a minimum of four (4) places along the circumference of the proposed nozzle location. Charlie Chong/ Fion Zhang
9.14.5 Installation Procedure 9.14.5.1 Pre-cut pipe nozzle to shell contour and outside bevel for full penetration weld. (See Fig. 9-6, page 9-12 for details). 9.14.5.2 After pipe nozzle is welded, install the reinforcement (1 piece or 2 pieces). A two piece pad requires a horizontal weld). NOTES: 1. Full penetration weld - pad to nozzle. 2. Limit weld heat input as practical. 9.14.5.3 Upon weld completion: a. Conduct NDE as required by procedure. b. Pneumatically test per <strong>API</strong>-650 procedure. c. After valve installation, pressure test (at least 1.5 times the hydrostatic head) the nozzle prior to mounting the hot-tap machine. 9.14.5.4 Following the hot-tap machine manufacturer's procedure, only qualified operators can make the shell cut. 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
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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
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
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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
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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: 9.13 Repair/Replacement of Floating
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.
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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 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 and 216: Q7. What primary factor determines
Page 217 and 218: 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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