Fitness-For-Service (FFS) assessments are quantitative engineering evaluations, which are performed to demonstrate the structural integrity of an in-service component containing a flaw or damage. FFS is a methodology whereby flaws contained within a structure are assessed in order to determine the adequacy of the structure for continued service without failure.
Level 1 Assessment
The assessment procedures included in this level are intended to provide conservative screening criteria that can be utilized with a minimum amount of inspection or component information.
Level 2 Assessment
The assessment procedures included in this level are intended to provide a more detailed evaluation that produces results that are more precise than those from a Level 1 assessment. In a Level 2 Assessment, inspection information similar to that required for a Level 1 assessment is needed; however, more detailed calculations are used in the evaluation.
Level 3 Assessment
The assessment procedures included in this level are intended to provide the most detailed evaluation that produces results that are more precise than those from a Level 2 assessment. In a Level 3 Assessment the most detailed inspection and component information is typically required, and the recommended analysis is based on numerical techniques such as the finite element method or experimental techniques when appropriate.
Our FFS specialists are able to implement FFS assessments using API 579-1/ASME FFS-1, in all levels. We have developed an advanced software solution called FITest which will help in performing Fitness for Service Assessments based on API 579.
We are able to perform FFS using all parts of API 579 including:
- Brittle Fracture
- General Metal Loss
- Local Metal Loss
- Pitting Corrosion
- Hydrogen Blisters and Hydrogen Damage Associated with HIC and SOHIC
- Weld Misalignment and Shell Distortions
- Crack-Like Flaws
- Components Operating in The Creep Range
- Fire Damage
- Dents, Gouges, And Dent-Gouge Combinations
- Fatigue Damage
LifeTech Engineering Ltd.
Enterprise Centre, Exploration Drive,
Bridge of Don, Aberdeen, UK - AB23 8GX
Phone: +44 (0) 1224 824112
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