Fitness for Service (FFS) evaluations are conducted to API and other relevant Codes to determine whether damaged equipment (such as distortions or cracks) found by inspection is suitable for continued service. This is an important aspect of an Asset Integrity Program in determining the safety and financial risk factors related to component repair or replacement.
There are many factors that affect plant aging. In the current competitive marketplace, extending the life of existing structures and components has become increasingly important in minimizing the total cost of ownership.
- Thermal and Mechanical Fatigue
- PWHT of Weld Repairs
- Weld Residual Stresses
- Mechanical Vibration
- Wind Induced Vibration of Towers & Stacks
- Blast and other Dynamic Effects
- Fatigue of Welded Joints
- Failure Analysis
- Fracture Mechanics
- Fatigue Life Assessment
- Bulges and Out-of-Roundness
- Creep, Stress-Corrosion & Corrosion Fatigue Crack Growth
- Elevated Temperature Analysis for Creep and Creep Fatigue
- Dents, Gouges & Combinations
- Fire Damage
- High Temperature Hydrogen Attack
Related Codes and Standards
Codes and standards for pressurized equipment provide rules for the design, fabrication, inspection, and testing of pressure vessels, piping systems, and storage tanks include:
- ASME B&PV Code, Section VIII, Division 1 – Rules for Construction of Pressure Vessels
- ASME B&PV Code, Section VIII Division 2 – Alternative Rules for Construction
- ASME B&PV 31.3 – ASME Code for Process Piping
- ASME B&PV 31.1 – ASME Code for Power Piping
- ASME Section XI – Rules for In-Service Inspection of Nuclear Power Plant Components
- API 650 – Welded Steel Tanks for Oil Storage
- API 620 – Design & Construction of Welded Low Pressure Storage Tanks
- BS 5500 – British Standard for Unfired Fusion Welded Pressure Vessels
- EJMA – Standards of the Expansion Joint Manufacturers Association
- Pressure Vessels
- Heat Exchangers
Core asset failure can have far reaching consequences, which impact reputation, scheduling, and your bottom line. Fitness for Service evaluations often result in lower maintenance & operating costs as well as improved plant safety. Read our article on Fitness for Service in Stainless Steel World. (PDF).
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