Damage Assessment & Fitness-for-Service — Engineering Services
Fitness-for-Service Assessment
Engineering assessment of equipment containing flaws, damage, or operating beyond original design conditions, using API 579-1/ASME FFS-1 methodology to determine continued suitability for service.
- —Fitness-for-service assessment in accordance with API 579-1/ASME FFS-1
- —Evaluation of general metal loss, local metal loss, pitting, and corrosion damage
- —Crack-like flaw assessment including stress corrosion cracking and fatigue
- —Level 1, Level 2, and Level 3 assessment capability based on flaw severity and data
- —Documented engineering justification for continued operation or retirement
- —Support for regulatory and jurisdictional compliance requirements
- —Input to inspection planning, turnaround scope, and capital replacement decisions
- —Applicable to pressure vessels, heat exchangers, piping, and storage tanks
Remaining Life Analysis
Calculation of remaining safe operating life for equipment subject to corrosion, erosion, creep, fatigue, or other time-dependent damage mechanisms — supporting run-or-replace decisions, inspection interval setting, and capital planning.
- —Remaining life calculation for equipment subject to time-dependent damage
- —Analysis based on measured thickness data, corrosion rates, and design parameters
- —Assessment of general corrosion, localised corrosion, erosion, creep, and fatigue
- —Calculation methods aligned with API 579-1/ASME FFS-1, API 510, API 570, and API 653
- —Support for run-or-replace decisions and capital expenditure planning
- —Inspection interval setting based on quantified remaining life
- —Turnaround scope prioritisation for ageing or degraded equipment
- —Documented analysis traceable to measured data and applicable codes
Corrosion Under Insulation Assessment
Engineering assessment of corrosion under insulation damage on pressure equipment and piping, including fitness-for-service evaluation, remaining life analysis, and repair or remediation recommendations.
- —Engineering assessment of CUI damage on pressure equipment and piping
- —Fitness-for-service evaluation of CUI-affected components per API 579-1/ASME FFS-1
- —Remaining life calculation based on measured or estimated corrosion rates
- —Evaluation of damage morphology including general thinning, pitting, and localised attack
- —Clear disposition recommendations — continued service, repair, or replacement
- —Coating and insulation condition assessment supporting remediation decisions
- —Integration with facility RBI and integrity management programmes
- —Documented assessment suitable for regulatory and jurisdictional review
Flow-Accelerated Corrosion Assessment
Assessment of flow-accelerated corrosion and erosion-corrosion damage in piping and equipment, including susceptibility evaluation, fitness-for-service analysis, and inspection strategy recommendations for affected systems.
- —Assessment of flow-accelerated corrosion and erosion-corrosion damage
- —Susceptibility screening based on flow regime, fluid chemistry, and materials
- —Fitness-for-service evaluation per API 579-1/ASME FFS-1 for affected components
- —Remaining life estimation accounting for projected FAC damage rates
- —Damage mechanism characterisation using API 571 and facility operating data
- —Inspection strategy recommendations for FAC-susceptible piping and equipment
- —Mitigation guidance including material selection and design modification options
- —Documented assessment for regulatory compliance and integrity programme integration
Pitting & General Corrosion Assessment
Engineering assessment of pitting and general corrosion damage in pressure equipment and piping, including fitness-for-service evaluation, remaining life calculation, and continued-operation recommendations.
- —Pitting and general corrosion assessment per API 579-1/ASME FFS-1
- —Evaluation of measured wall thickness data and damage distribution
- —Pitting assessment accounting for pit density, depth, and interaction effects
- —Remaining life calculation based on measured and projected corrosion rates
- —Minimum required thickness verification against applicable design codes
- —Documented engineering basis for continued operation or retirement
- —Integration with RBI programme risk rankings and inspection plans
- —Applicable to pressure vessels, piping, heat exchangers, and storage tanks
Stress Corrosion Cracking Assessment
Assessment of stress corrosion cracking and environmentally assisted cracking in pressure equipment and piping, including crack characterisation, fracture mechanics evaluation, and fitness-for-service determination.
- —Assessment of stress corrosion cracking and environmentally assisted cracking mechanisms
- —Crack-like flaw evaluation per API 579-1/ASME FFS-1 and BS 7910
- —Evaluation of chloride SCC, caustic cracking, amine cracking, SSC, and HIC
- —Fracture mechanics analysis considering material toughness and stress conditions
- —Critical crack size evaluation and remaining life assessment where data permits
- —Damage mechanism assessment informed by API 571 and operating environment data
- —Documented fitness-for-service determination for cracked components
- —Repair, monitoring, or replacement recommendations based on assessment outcome
Engineering critical assessment (ECA)
Fracture mechanics-based engineering critical assessment in accordance with BS 7910, DNVGL-RP-F108, and API 579-1/ASME FFS-1 Level 3 — including strain-based ECA for pipelines subject to ground movement and seismic loading, and flaw acceptance criteria development for fabrication and in-service assessment.
- —Engineering critical assessment in accordance with BS 7910, DNVGL-RP-F108, and API 579-1/ASME FFS-1 Level 3
- —Strain-based ECA for pipelines subject to ground movement, frost heave, and seismic loading
- —Pipeline girth weld assessment to DNVGL-RP-F108
- —Flaw acceptance criteria development for fabrication and in-service inspection
- —Fracture toughness requirement specification and residual stress evaluation
- —Post-repair acceptance criteria development where workmanship limits are insufficient
- —Inspection method sensitivity requirements based on critical flaw size determination
- —Applicable to new construction, in-service assessment, and fitness-for-purpose evaluation
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