API-579-Section-5-Level-2-Assessment.xls

DataAPI 579 SECTION 5 - Assessment of local metal lossLevel 2 AssessmentInternal design pressure:34.0PsigInside Diameter:12.8inNominal thickness:7.900inYield stress:23.0PsigAllowable tensile stress:3.0PsigAllowable compressive stress:2.0PsigAllowable RSF2.0Weld joint efficiency:5.0Longitudinal weld joint efficiency:4.0Uniform metal loss:6.000inEstimated corrosion rate:7.0mpyTime for next inspection:6.0yearsFuture Corrosion Allowance:0.042inMinimum thickness suplemental loads:6.000inMinimum required thickness:Circumf.:-78.181inLongit.15.683inMAWP:Circumf.:2.1PsigLongit.-8.8PsigMinimum required thickness:15.683inMAWP:-8.8Psig

Inspection DataINSPECTION DATA OF LOCAL METAL LOSS USING A 15 x 15 GRID:Minimum measured thickness:23.000inFlaw dimensions: Long. (s):3.0in(Based on minimum required thickness)Circ. (c):2.0in(Based on nominal thickness - Loss - FCA)Distance to major structural discontinuity (Lmsd)=2.0in(See Notes below)Remaining thickness ratio (Rt):1.46Shell parameter ():0.273Limiting flaw size criteria:Rt 0.20oktmm-FCA 0.1"ok 5.0okLmsd 1.8(D t)^0.5Not okLongitudinal Inspection PlanesCircumferential Inspection PlanesCircumferential CTPRANKAscending OrderC1C2C3C4C5C6C7C8C9C10C11C12C13C14C15M14.0004.000150.000M20.00010.000M30.00010.000M40.00010.000M50.00010.000M60.00010.000M70.00010.000M80.00010.000M90.00010.000M100.00010.000M110.00010.000M120.00010.000M130.00010.000M140.00010.000M150.00014.000Longitudinal CTP4.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.000RANK1511111111111111Ascending order0.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.0000.0004.000Spacing of thickness readings in longitunidal direction:inSpacing of thickness readings in circumferential direction:inNotes:1- A major structural discontinuity is a source of stress or strain intensification which affects a relatively large portion of a structure and has a significant effect on the overall stressor strain pattern of the structure as a whole. Examples are: head-to-shell and flange-to-shell junctions, nozzles, junctions between shells of different diameters or thicknesses,piping/platform supports, conical transitions, stiffening rings, and saddles supports.2- The measure of the minimum distance is from the nearest edge of the region of local metal loss to the nearest weld of the structural discontinuity.

Assessment Longitudinal FlawsEVALUATION OF THE LONGITUDINAL EXTENT OF THE FLAWMINIMUM RSF=0.000POINT 1Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 2Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 3Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 4Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 5Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 6Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 7Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 8Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 9Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 10Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 11Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 12Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 13Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 14Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF0.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.004.0000.000.000.000.001.010.00Minimum RSF:0.00POINT 15Measured ThicknessLength of metal lossAprox. area of metal lossOriginal metal areaShell ParameterFolias FactorRSF4.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.000.0000.000.000.000.001.010.00Minimum RSF:0.00MINIMUM RSF=0.00

Assessment Circumferential FlawEVALUATION OF THE CIRCUMFERENTIAL EXTENT OF THE FLAWWeight Load CaseWeight plus Thermal Load CaseDi =24.83Maximum Allowable Working Pressure, MAWPr (Psi)-8.8-8.8Do =40.63Df =-5.28Applied section axial force , F (lbs) = =-21.69Applied section bending moment about the x-axis, Mx (in-lbs)=Aa =484.38Am =812.41Applied section bending moment about the y-axis, My (in-lbs) =Ix = Iy =115151.68Af =55.74Applied net-section torsion as applicable, MT (in-lbs) =Aw =540.12y =0.63Applied net-section shear force as applicable, V (lbs) =xa =0.00ya =20.95xb =-7.51yb =19.51Maximum longitudinal membrane stress, lm (Psi) =-7.6-7.6b =0.88R =-2.64Maximum circumferential stress (hoop stress from pressure), cm (Psi) =-2.4-2.4d =-15.06Atf =8.84Maximum shear stress in the region of local metal loss, (Psi) =0.00.0yLX =8.55Allowable stress factor, H (in-lbs) =0.751.5ILX =211.97I =110569.02ILY =208.57(2cm cm lm + 2lm + 32 )1/2 H ysACCEPTABLEACCEPTABLEI =114943.11At =825.20If lm is compressive, then lm Allowable stressACCEPTABLEACCEPTABLEWeight Load CaseWeight plus Thermal Load Caselm(a) =-7.67-7.67lm(b) =-7.57-7.57

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API-579-Section-5-Level-2-Assessment.xls