API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

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2-112 API RECOMMENDED PRACTICE 581C ageCoat adjC rC rBis the total anticipated coating life from the time of installation, yearsis the coating adjustment, yearsis the corrosion rate, mm/yearis the base value of the corrosion rate, mm/yearCUIFp1Co is the conditional probability of inspection history inspection effectiveness for damage state 1CUIFp2Co is the conditional probability of inspection history inspection effectiveness for damage state 2CUIFp3Co is the conditional probability of inspection history inspection effectiveness for damage state 3COV PCOV S fCOV ∆tDis the pressure varianceis the flow stress varianceis the thinning varianceis the component inside diameter, mm (inch)D S1 is the corrosion rate factor for damage state 1D S2 is the corrosion rate factor for damage state 2D S3 is the corrosion rate factor for damage state 3CUIFD fis the DF for CUI for ferritic componentsEF CMF EQF ICF IFF INSis the weld joint efficiency or quality code from the original construction codeis the corrosion rate adjustment factor for insulation complexityis an adjustment factor for equipment design detailis the corrosion rate adjustment factor for insulation conditionis the corrosion rate adjustment factor for interface for soil and waterthe corrosion rate adjustment factor for insulation typeCUIFFS is the flow stress, MPa (psi)I 1 CUIF is the first order inspection effectiveness factorI 2 CUIF is the second order inspection effectiveness factorI 3 CUIF is the third order inspection effectiveness factorL eis the measured wall loss due to CUI, mm (inch)CUIFN A is the number of A level inspectionsCUIFN B is the number of B level inspections
RISK-BASED INSPECTION METHODOLOGY, PART 2—PROBABILITY OF FAILURE METHODOLOGY 2-113CUIFN C is the number of C level inspectionsCUIFN D is the number of D level inspectionsPCUIFPo p 1CUIFPo p 2CUIFPo p 3CUIFPr p 1CUIFPr p 2CUIFPr p 3SCUIFSR Ptt ct mint rdeTSYSαis the pressure (operating, design, PRD overpressure, etc.) used to calculate the limit statefunction for POFis the posterior probability posterior for damage state 1is the posterior probability posterior for damage state 2is the posterior probability posterior for damage state 3is the prior probability of corrosion rate data reliability for damage state 1is the prior probability of corrosion rate data reliability for damage state 2is the prior probability of corrosion rate data reliability for damage state 3is the allowable stressis the strength ratio parameter defined as the ratio of hoop stress to flow stressis the furnished thickness of the component calculated as the sum of the base material andcladding/weld overlay thickness, as applicableis the minimum structural thickness of the component base materialis the minimum required thickness based on the applicable construction codeis the measured thickness reading from previous inspection with respect to wall lossassociated with CUIis the tensile strengthis the yield strengthis the component geometry shape factorβ 1 CUIF is the β reliability indices for damage state 1β 2 CUIF is the β reliability indices for damage state 2β 3 CUIF is the β reliability indices for damage state 3Φis the standard normal cumulative distribution function16.8 ReferencesSee Reference [83] in Section 2.2.
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Risk-Based Inspection MethodologyAP
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ForewordNothing contained in any AP
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CONTENTS1 SCOPE ...................
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1-2 API RECOMMENDED PRACTICE 5811.4
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PART 2PROBABILITY OF FAILURE METHOD
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5.8 Figures .......................
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12.7 Nomenclature .................
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19.6 Determination of the Damage Fa
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Risk-Based Inspection MethodologyPa
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RISK-BASED INSPECTION METHODOLOGY,
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CONTENTSTABLE 2.A.1—LEADERSHIP AN
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2.A-2 API RECOMMENDED PRACTICE 581T
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2.A-10 API RECOMMENDED PRACTICE 581
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PART 2, ANNEX 2.BDETERMINATION OF C
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2.B.8 AMINE CORROSION .............
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CONTENTSOVERVIEW ..................
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2.C-2 API RECOMMENDED PRACTICE 581D
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PART 3CONSEQUENCE OF FAILURE METHOD
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4.6.5 Releases to the Environment .
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5.9.7 Determination of Final Toxic
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3-2 API RECOMMENDED PRACTICE 581[7]
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CONTENTS3.A.1 GENERAL .............
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CONTENTS1 GENERAL………………
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3.B-2 API RECOMMENDED PRACTICE 5813
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PART 5SPECIAL EQUIPMENT5-1
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Consequence of Failure Methodology
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CONTENTS5.A.1 General .............
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API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

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