Optimal provides specialist API579 Fitness-for-Service (FFS) support to help asset-intensive organisations assess, manage, and extend the safe operating life of pressure equipment and critical infrastructure.
API579 is the internationally recognised standard for evaluating equipment that contains flaws or damage, enabling operators to make informed decisions about continued operation, repair, rerating, or replacement. Our engineers integrate API579 within broader Asset Integrity and Reliability strategies, ensuring compliance, safety, and performance are aligned.
Our API579 Capability
We support organisations with:
- Fitness-for-Service Level 1, 2 and 3 assessments
- Damage mechanism evaluation and defect analysis
- Crack-like flaw assessment and fracture mechanics
- Corrosion and wall loss evaluation
- Remaining life assessment
- Repair vs replace decision support
- Integration with Risk-Based Inspection (RBI) frameworks
- Alignment with Asset Integrity Management Systems (AIMS)
Our approach ensures assessments are not standalone engineering exercises, they are embedded within your Asset Performance Management (APM) and ISO55001-aligned asset management systems.
Integrated Integrity & Reliability – API579
API579 assessments deliver the most value when combined with:
- ISO14224-aligned reliability data
- Predictive and condition monitoring programmes
- Risk-based maintenance strategies
- Lifecycle cost modelling
- Operational risk management
Optimal ensures technical integrity decisions are supported by robust data, governance and long-term asset strategy.
Industries Supported – API579
- Oil & Gas
- Power Generation
- Nuclear
- Petrochemical
- Mining & Processing
- Heavy Manufacturing
Frequently Asked Questions
What is API579 Fitness-for-Service?
API579 Fitness-for-Service is a standard for evaluating damaged or degraded pressure equipment to determine if it can continue operating safely, be repaired, rerated or replaced, based on engineering analysis.
When should an API579 assessment be used?
Use API579 when there is evidence of corrosion, cracking, wall loss, mechanical damage or other degradation mechanisms affecting pressure-containing equipment.
What levels of analysis does API579 include?
API579 defines Level 1, Level 2 and Level 3 assessments, ranging from simplified calculations to detailed fracture mechanics, depending on the level of risk and data available.
How does API579 support asset integrity?
Fitness-for-Service assessments help quantify risk, support maintenance planning, justify repair decisions and integrate with integrity management systems to protect safety and uptime.
Can API579 be integrated into reliability programmes?
Yes, Optimal integrates API579 assessments with reliability data and risk-based inspection strategies to strengthen asset performance and lifecycle planning.
Why Optimal?
We combine engineering depth with data-driven asset strategy. Our API579 services are integrated into broader asset integrity, reliability and operational readiness programmes, ensuring safe, defensible, and performance-focused outcomes.
Curious how this service applies to your business? Contact us at enquiries@optimal.world | www.optimal.world
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