Fitness-For-Service (FFS)

Assess whether damaged equipment can safely continue operating, with clear guidance on remaining life and next steps—run, repair, or replace.
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Is the Equipment Safe to Operate?

Fitness-For Service (FFS) is the engineering approach used to determine whether equipment is safe to continue to operate with damage or defects.  
The result of an FFS assessment is a determination of remaining life and a decision to run, repair, or replace the equipment. API 579-1/ASME FFS-1 (API 579) is the international Code that provides guidance on how to assess various types of damage, including:

  • Volumetric Damage (General Metal Loss, Local Metal Loss, or Pitting)
  • Fatigue and Fracture (Brittle Fracture or Cracking)
  • Geometric Imperfections (Distortion, Weld Misalignment, Dents, or Gouges)
  • High Temperature Creep
  • Hydrogen Damage

Although traditionally FFS technology tends to be utilized in a reactionary mode after damage is found, there are many ways that FFS technology can be employed proactively to enhance decisions made at every phase of the equipment life cycle.

Fitness-For-Service (FFS)

Prompt technical help to aid in quick decisions to keep our facility reliability on track. Easy to get a hold of the team.

Chief Inspector, 2026
Western Canada Oil & Gas Producer

How we work

At CANATUS Engineering Group, we work closely with clients to solve complex mechanical integrity and pressure equipment challenges through practical engineering, sound judgement, and collaboration. We stay hands-on throughout the process, combining technical analysis with real-world operating experience to deliver solutions that are technically rigorous, practical to implement, and focused on long-term reliability. We also believe in transferring knowledge to our clients, helping teams build confidence and capability rather than relying on black box solutions.

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Other services

Advanced Analysis
Asset Intergrity & Life Cycle Management
Education & Training
Maintenance Engineering
Turnaround & Shutdown Support

You run complex industrial assets and need confidence that your equipment will perform safely and reliably.

We understand the stakes and have extensive experience tackling complex challenges. Whether you are seeking emergency support or strategic solutions to chronic problems, we are prepared to help.

Learn more about CANATUS
50+
Years Experience
1K+
Projects Completed
50+
Facilities Supported
$250M+
US Dollars Saved

Ready to talk about your asset integrity challenges?

Whether you are seeking emergency support or strategic solutions to chronic problems, we are prepared to help.

Schedule a call