Fitness-For-Service (FFS) Assessments
At Sequence, we combine decades of multidisciplinary engineering expertise with advanced finite element analysis (FEA), computational fluid dynamics (CFD) and fracture mechanics to deliver precise, reliable Fitness-For-Service (FFS) assessments. Our approach ensures the continued safety and integrity of critical equipment, helping you make informed decisions about ongoing operation, repair, or retirement.
Reach out today to learn how we can support your engineering needs with industry-leading FFS evaluation and analysis.
What is Fitness-For-Service (FFS)?
Fitness-For-Service (FFS) is a well-established engineering assessment methodology used to evaluate the structural integrity and remaining life of in-service equipment. By applying industry standards such as API 579-1 and BS 7910, FFS assessments help determine whether components affected by defects, material degradation, or damage can continue to operate safely or require repair or replacement.
FFS enables engineers to make informed decisions about asset management, minimising downtime and ensuring compliance with safety regulations.
We offer Fitness-For-Service in New Zealand and beyond.
As FFS specialists, we provide comprehensive simulation solutions and consultancy services to customers across the globe. Some of those services include:
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Evaluating crack-like flaws using methodologies such as Failure Assessment Diagrams (FAD) and J-integral analysis to determine structural integrity and remaining life.
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Assessing the impact of general and localized corrosion on component strength and stability to ensure continued safe operation
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Predicting long-term material deformation under high-temperature and stress conditions, ensuring compliance with design life expectations
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Identifying the risk of sudden fracture in low-temperature or high-stress environments by analysing material toughness and applied stresses
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Evaluating load-bearing capacity and failure risk using elastic-plastic finite element methods to prevent catastrophic structural failure
Our Fitness-For-Service (FFS) Assessment Services
We specialize in comprehensive Fitness-For-Service (FFS) assessments, applying industry best practices and advanced engineering methodologies to evaluate structural integrity and remaining life, ensuring the safe operation of critical assets.
Our FFS services include:
FFS assessments of defects and plant equipment to ASME FFS-1/API-579 standards
Fracture mechanics assessment of crack-like flaws using Failure Assessment Diagrams (FAD) and J-integral methods
Assessment of corrosion under insulation (CUI) and locally thinned areas (LTA) to determine the impact of degradation on equipment safety
Creep analysis of high-temperature components to assess creep damage and remaining life
Thermal stress assessments of plant equipment during startup and shutdown to mitigate risks associated with transient thermal loads
CFD modeling for thermal load evaluation to assess heat transfer and flow effects on equipment performance
Plastic collapse and limit load analysis using elastic-plastic finite element methods to prevent structural failure
Fatigue and cyclic loading analysis for pressure vessels, silos, and structural components subjected to cyclic service
Remaining life assessment of critical components based on fatigue, creep, and corrosion effects
Root cause analysis (RCA) of failed components to identify failure mechanisms and develop corrective actions
Remaining Life Assessment: Estimating the operational lifespan of components based on degradation mechanisms such as fatigue, creep, and corrosion to support maintenance planning and asset management.
We offer our expertise in FFS to various industries, including:
Aerospace
Automotive
Marine
Energy Sector
Electronics
Construction & Civil Engineering
Health Sector
Process & Chemical Engineering
Water Engineering
Architectural & Environmental Engineering