Case Study – Weekly Level 1-2 FFS/Repairs

Case Study – Weekly Level 1-2 FFS/Repairs

FFS Weekly Inspections

Becht handles weekly FFS evaluations for the past 8+ years for an onshore facility in Iraq. If FFS fails, Becht can:

  1. De-rate the vessel;
  2. Design a repair;
  3. Proceed to level 3 FFS.


Becht evaluations also have covered these aspects:

  1. Tankage
  2. Expansion joints
  3. Heat exchanger
  4. Civil/structural


Pressure Vessel Design Calculations

  • Min. Required Thickness
  • Max. Allowable Working Pressure (MAWP)


Fitness for Service (API 579-1/ASME FFS-1)

  • Uses Becht proprietary software
  • Level 1 and Level 2 analysis
  • General metal loss/local metal loss
    • Pass
    • Fail – Repair or de-rate MAWP


The FFS assessments have enabled the facility to plan and prioritize vessel inspections, repairs, and replacements to keep running longer and reduce downtime when it is necessary.

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