Understanding API ICP653 Reading 7-Worksheet-04 Part1

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Q5. All prior reported brittle fracture tank failures have occurred under which of the following conditions/situations? a. Atmospheric temperature of 20°F or lower. b. During a hydro test where the test water was 200°F or hotter. c. Shortly after erection, following a repair/alteration, first cold weather filling or change to lower temperature service. d. Where a testing medium other than water was used. ANS: C Q6. When external UT "t" measurements are used to determine a rate of general, uniform corrosion (relevant to shell integrity) which of the following values cannot be exceeded? a. 10 years maximum b. 20 years maximum c. 5 years (after commissioning), or at 5 year intervals (where corrosion rate is not known). d. Five years or RCA/4N, whichever is more. ANS: C Charlie Chong/ Fion Zhang
Q7. What primary factor determines the interval between internal and external inspections? a. Jurisdictional regulations b. Tank service history, unless special reasons indicate an earlier inspection is required. c. Known (or suspected) corrosion activity of product. d. Change of service to a product with a specific gravity 10% higher than prior stored product. ANS: B Q8. What is the minimum dimension for a shell ring replacement piece or segment? a. The actual area requiring renewal, plus 6" on all four surrounding sides. b. 12" or 12 times the "t" of the replacement plate, whichever is greater. c. 10% of the individual ring segment involved. d. 20% of the individual ring segment involved. 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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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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Page 209 and 210: G.3 An explanation of Tank Bottom E
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Page 231 and 232: Good Luck! Charlie Chong/ Fion Zhan
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