API 579 Fitness-for-Service and Remaining Life Assessment

API 579 Fitness for service assessments by G2MT LabsAPI 579 Fitness for Service: “Integrity is the essence of everything successful”

The G2MT Labs fitness-for-service team uses API 579 assessment to determine the structural integrity of damaged components.

Over time most engineered structures suffer from degradation through corrosion, accidental damage, excessive use, operation outside of established parameters, and other causes. Often the nature and extent of these degradation mechanisms is unknown, increasing the likelihood of unpredictable failures. The critical first step is determining the damage mechanism and evaluating its time-dependence.

The next step is a multi-disciplinary analysis of the equipment to determine if it is fit for continued service by following the API 579-1 FFS standard [1, 2], often including stress analysis, FEA, and other calculations. At this point, a recommendation can be made to monitor, repair, alter, or replace the equipment.

The API 579 Fitness-for-Service Assessment Process

In many applications, existing or damaged components must be qualified to ensure continued safe operations for many years of service in dynamic and challenging environments. Fatigue, corrosion, wear, hydrogen damage, HTHA, and other forms of degradation must be estimated to allow the selection of an appropriate maintenance plan. We use API 579 or other industrial standards for FFS testing, in combination with high-quality metallurgical laboratory services and cutting-edge finite element modelling capabilities.

  1. The first step is a damage mechanism assessment.
  2. Then we perform interviews and surveys to obtain the necessary field data
  3. Depending on the scope of damage, FFS level 1, 2, or 3 type assessments are made.
  4. We provide you with guidance and remaining life assessment for your operations.Fitness for Service testing of containers, pressure vessels, pipelines, and other components - picture by G2MT Labs

Fitness-for-service is important for existing component life prediction. When flaws or damage to your existing equipment or components are detected or suspected, the critical next step is fitness-for-service testing and evaluation to determine whether components need to be repaired, used more gently, replaced, or if they are still have sufficient remaining life to stay in service. G2MT Labs and our FFS testing partners have many years of experience in life prediction and maintenance planning. We use cutting-edge software, modeling, and testing practices to make sure you get the best answer every time.

Fitness-for-service testing incorporates all of the data from metallurgical testing, mechanical testing, and other data, to predict the remaining life of a component and allows operators to select an appropriate maintenance (or replacement) strategy to ensure long-term integrity.

Fitness-for-Service testing is commonly applied to:

  • High-energy Piping
  • Pressure Vessels
  • Storage Tanks
  • Steam Turbine Blades, Nozzles, and Components
  • Fired Heaters
  • Pipelines
  • Headers
  • Reformers
  • HTHA and other Hydrogen Damage Mechanisms
  • Coke Drums
  • Flare Drums
  • Process Piping

Related Inspection Services:

In addition to API 579, G2MT Labs can provide you with many related inspection services including:

API 510 Pressure Vessel Inspection
API 570 Piping Inspection
API 580 Risk Based Inspection
API 653 Above Ground Storage Tank
API 936 Refractory Inspection

Fitness for Service Resources: