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WHO WE ARE
E²G|The Equity Engineering Group, Inc. is internationally recognized in the refining and petrochemical industries as a leader in aging infrastructure services and support.
• E2G engineers pioneered the advancement of Fit-ness-for-Service (FFS) technologies and were the lead investigators of the international standard API 579-1/ASME FFS-1 (API-579).
• The document has rapidly become the FFS standard of choice for other industries including pulp & paper, fossil utility, food processing, and non-commercial nuclear.
API 579/ASME FFS FOR THE WEBA COMPLETE FFS SOLUTION
FFS ASSESSMENTS
AN INTUITIVE USER
INTERFACE
FAST COMPUTATIONS
ON ANY DEVICE
Part 3Brittle Fracture
Part 2FFS Overview
Part 1Introduction
Parts 4 and 5Thinning
Part 6Pitting
Part 7Hydrogen Damage
Part 8Shell Distortion
Part 9Crack-like Flaws
Part 10Creep
Part 11Fire Damage
Part 12Dents and Gouges
Part 13Laminations
Part 14Fatigue Damage
E2G | The Equity Engineering Group, Inc
WHY THE WEB?
• No installation - No maintenance - Ever• Runs in any compatible web browser• Access on phones, tablets, and desktop browsers• Calculations handled on powerful cloud servers • Does not consume local CPU resources• Instant access to updates and improvements• User friendly and easy to use, despite complex calcu-
lations going on under the hood
Corporate Headquarters 20600 Chagrin Boulevard, Suite 1200Shaker Heights, OH 44122www.EquityEng.com
For More Information:P. 216-283-9519E. WebTools@EquityEng.comW. EquityEng.com/API-579ASME-FFS
API 579 / ASME FFS – FOR THE WEB
The new web-based delivery of API-579 offers a complete set of WebTools for conducting a fitness-for-service assessment. Each Part of API-579 is included as a separate WebTool. The WebTools incorporate the most recent updates to API-579 and offer numerous features:
• Intuitive user interface; • Clear organization of results; • Modern graphics; • Automatically generated reports for easy sharing; • Ability to save and load assessments; • Easy access to help, and much more.
API 579/ASME FFS - FOR THE WEB
• Provide Feedback: At all steps, users may send feed-back, ask questions, provide general comments and rec-ommend enhancements.
• Intuitive/Concise User-Interface: Leveraging years of ongoing customer feedback, the user interface is orga-nized in an intuitive concise manner that aligns with the user’s expectations. Each tool maintains a consistent step-based workflow design. The most important and meaningful results are presented first, with additional results available at the click of a button.
• Pre-Populated Examples: Each WebTool includes a cata-logue of pre-populated examples to demonstrate typical use cases and highlight specific capabilities.
• Save/Load Cases: Each assessment can be saved to the user’s local hard drive, and files from previous assess-ments can be loaded to automatically populate all fields.
• PDF Reports: A printable or downloadable PDF report is generated with each assessment that contains all inputs necessary to reproduce the calculation, and all primary and intermediate results.
• US/SI Units: Each WebTool is compatible with both im-perial (US Customary) unit and metric (SI) systems.
• Extensive Material Database: Each WebTool has access to E2G’s extensive material property database with cov-erage of the most popular construction codes, i.e. ASME Section I, VIII-1, VIII-2, B31.1, B31.3, B31.4, and B31.8.
• Excel Compatible: Tabular input data may be entered di-rectly or copy-and-pasted from Excel.
• Data Validation: Logic checks are built into the input fields so that users are alerted of out-of-bounds condi-tions that may lead to misleading results or errors.
• Information Buttons: Info buttons direct users to addi-tional information for input fields that warrant a more thorough explanation.
• Instructional Videos: While the interface is designed for simplicity, videos are included throughout EEC to pro-vide additional guidance.
• Verification: Extensive software verification and quality management per ISO 9001.
Corporate Headquarters 20600 Chagrin Boulevard, Suite 1200Shaker Heights, OH 44122www.EquityEng.com
Part Damage Mechanism Level Professional ExpertPart 1 Introduction N/A ☑ ☑
Part 2 FFS Overview N/A ☑ ☑
Part 3 Brittle Fracture1, 2 ☑ ☑
3 ☑
Parts 4 & 5 General and Local Thinning 1,2 ☑ ☑
Part 6 Pitting 1,2 ☑ ☑
Part 7 Hydrogen Damage 1,2 ☑ ☑
Part 8 Shell Distortion 1,2 ☑ ☑
Part 9 Crack-Like Flaws 1,2 ☑ ☑
Part 10 Creep 1,2 ☑ ☑
Part 11 Fire Damage 1,2 ☑ ☑
Part 12 Dents and Gouges 1,2 ☑ ☑
Part 13 Laminations 1,2 ☑ ☑
Part 14 Fatigue Damage1,2 ☑ ☑
3 ☑
SOFTWARE CAPABILITIES
GENERAL CAPABILITIES
For More Information:P. 216-283-9519E. WebTools@EquityEng.comW. EquityEng.com/API-579ASME-FFS
PART 3 – BRITTLE FRACTURE
Level 1• Screening of equipment for susceptibility to
brittle fracture• Point wise screening check of MAT at MAWP
Level 2 • Includes Methods A and B
• Method A – Determines safe operating MAT envelope
• Method B – Hydrostatic pressure checkLevel 3
• Detailed assessment using fracture mechanics, based on Part 9
• Evaluation of controlling factors: stress, flaw size, and toughness
What Else?• User defined operating envelope may be input for comparison
PARTS 4 AND 5 – GENERAL AND LOCAL THINNING
Levels 1 and 2• Thickness readings input options:
• Random Point Thickness Readings (PTR)• Critical Thickness Profile (CTP)• Grid of thickness readings
• No limit to number of thickness readingsWhat Else?
• Applicable to Type A components per API 579-1/ASME FFS-1
• Acceptability criterion based on MAWP and thickness criteria
• Remaining life from user-specified corrosion rate• Output includes visuals of thickness readings
ContourPlotofThicknessMeasurements
LongitudinalDirection(in)
Circum
ferentialD
irection(in
)4
2
1
00 2 4 6 8
0.9
0.8
0.7
0.6
3
0.5
5
6
AllowableInternalPressure– Temperature(MAT)Envelope
Temperature(F)
Pressure(psi)
150
100
50
0-150 -100 -50 0 50 100
Pressure-TemperatureCurveUserOperatingCurve
API 579/ASME FFS - FOR THE WEB (PARTS 3-6)
Corporate Headquarters 20600 Chagrin Boulevard, Suite 1200Shaker Heights, OH 44122www.EquityEng.com
For More Information:P. 216-283-9519E. WebTools@EquityEng.comW. EquityEng.com/API-579ASME-FFS
PART 6 – PITTING
Level 1• Screening comparison with standard pitting charts• Generate custom pit charts
Level 2• Widespread pitting and localized pitting• Based on detailed pit-couple interactions
What Else?• No limits on number of pit-couple interactions• Applicable to Type A components per API 579-1/ASME FFS-1• Acceptability criterion based on both MAWP and thickness
CustomPittingChart(15%PitDensity)
Length(in)
Width(in)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.00.0 1.0 2.0 3.0 4.0
API 579/ASME FFS - FOR THE WEB (PARTS 7-9)
PART 8 – SHELL DISTORTION
Level 1• Based on construction code fabrication tolerances
Level 2• Includes fatigue assessment
• ASME smooth bar or welded joint fatigue curveWhat Else?• Includes misalignment and/or out-of-roundness• Centerline offset and/or angular misalignment• Longitudinal and circumferential weld seams• Global and arbitrary-shape out-of-roundness
PART 7 – HYDROGEN DAMAGE
Level 1• Screening criteria for hydrogen damage
Level 2• HIC Strength Assessment evaluating using RSF
approach• HIC Crack-like Flaw Assessment based on Part 9,
Level 2• Hydrogen Blister Assessment evaluated as local
metal loss (Part 5) • Hydrogen Blister Assessment includes check for
periphery cracksWhat Else?
• Accounts for both hydrogen blisters and HIC
Corporate Headquarters 20600 Chagrin Boulevard, Suite 1200Shaker Heights, OH 44122www.EquityEng.com
For More Information:P. 216-283-9519E. WebTools@EquityEng.comW. EquityEng.com/API-579ASME-FFS
PART 9 – CRACK-LIKE FLAWS
Level 1• Determines limiting flaw length using Level 2 with
Level 1 restrictions• Semi-elliptical surface breaking and through-wall
cracksLevel 2
• Evaluates critical crack-front points using the FAD• Semi-elliptical surface breaking, through-wall, and
embedded cracks• Cracks parallel or normal to longitudinal or
circumferential weldsWhat Else?
• Output includes critical flaw screening curve• Weld residual stress based on welding parameters• Material Toughness using Master Curve or ASME Section XI model
FailureAssessmentDiagram(FAD)SensitivityAssessment
LoadRatio,Lr
Toughn
essR
atio,K
r
1.0
0 0 0.2
AcceptableZone
0.8
0.6
0.4
0.2
0.4 0.6 0.8 1.0 1.2
SurfaceLocation(0°)ThroughWallLocation(90°)
PART 10 – CREEP
Level 1• Screening criteria for creep damage• Specified target component life and operating
temperature• Provides conservative estimate of creep-governed
allowable stress • Specify multiple historical operating conditions for
comparison• Duration, pressure, temperature, corrosion
rateLevel 2
• Calculates cumulative creep damage based on historical operating conditions
• Estimate of remaining life based on projected future conditions• Choose between MPC Omega or Larson Miller creep damage procedure
API 579/ASME FFS - FOR THE WEB (PARTS 10-12)
PART 11 – FIRE DAMAGE
Level 1 • Heat Exposure Zones established to determine
components that require a Level 2 assessmentLevel 2
• Estimate fire damaged tensile and allowable stress• Predict MAWP, MDMT, and retirement thickness• Accounts for flame impingement and radiant heat
of a fireWhat Else?
• Fire damage properties based on hardness test values
Corporate Headquarters 20600 Chagrin Boulevard, Suite 1200Shaker Heights, OH 44122www.EquityEng.com
For More Information:P. 216-283-9519E. WebTools@EquityEng.comW. EquityEng.com/API-579ASME-FFS
ELEVATION VIEWFire Source
Zone I Zone II
Zone IVZone IV
Zone V
Zone VI
PART 12 – DENTS AND GOUGES
Level 1• Limits maximum dent depth to % of outer
diameter• Part 5 methodology assuming gouge is local metal
loss• Combined dent/gouge
• Screening criteria based on dent depth to OD and gouge depth to wall thickness
Level 2• Includes a fatigue assessment for effects of cyclic
pressure• Combined dent/gouge
• RSF approach • Determines MAWP based on dent and gouge depths
What Else?• Includes dents, gouges, and combined dents-gouges
Dent-GougeCombinationInteractionDiagram
GougeDepthtoThicknessRatio(in/in)
DentDepthto
DiameterRatio(in/in) 0.30
0 0 0.005
AssessmentPointBoundaryofAcceptability
0.25
0.20
0.15
0.10
0.05
0.010 0.015 0.020 0.025 0.030
PART 14 – FATIGUE DAMAGE
Level 1• Screening criteria for fatigue damage • Customization for in-service components
Level 2• Smooth bar and welded joint fatigue methods• Cycle counting and plasticity correction included
Level 3• Strain-life fatigue damage model• Multiaxial critical plane cycle count and search for
plane of maximum damageWhat Else?
• Palmgren-Miner damage accumulation • No limit to the size of the input loading history • Primary results are a prediction of cumulative fatigue damage and number of permissible repetitions of the
user-specified loading history until failure• Additional results include cycle data, applicable fatigue curve, and loading history plots
PART 13 – LAMINATIONS
Levels 1 and 2• Screening criteria for lamination damage• Assess laminations parallel to plate surface
Controlling factors include:• Lamination size• Orientation relative to the surface• Spacing of lamination to weld-joints,
structural discontinuities, and other laminations
API 579/ASME FFS - FOR THE WEB (PARTS 13-14)
Corporate Headquarters 20600 Chagrin Boulevard, Suite 1200Shaker Heights, OH 44122www.EquityEng.com
For More Information:P. 216-283-9519E. WebTools@EquityEng.comW. EquityEng.com/API-579ASME-FFS
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