Fitness for Services (FFS)

Fitness-for-service evaluations are performed on pressure equipment (pressure vessels, heat exchangers, boilers, storage tanks, piping etc.) for a wide variety of flaws. Below are some common flaws requiring FFS evaluations:
 Generalized Corrosion
 Localized Corrosion / Corrosion under insulation
 Pitting Corrosion
 Blisters and Laminations
 Fire Damage

VELOSI’s FFS Methodology:

VELOSI performs fitness-for-service evaluations on pressure vessels, heat exchangers, boilers, storage tanks, piping and other specialized equipment to ensure the structural integrity of equipment for the intended design parameters which are usually level-1, 2 & 3. This evaluation is based on API-579-1 /ASME FFS-1,JUNE 5,2007 (fitness for service) and other applicable codes, standards and specifications. Fitness For Services (FFS) For Onshore & Offshore Installations

A full range of the FFS experience

VELOSI has evaluated all types of damage that can occur in the refining and petrochemical industries on a wide variety of pressure vessels, process piping, transmission pipelines, storage tanks, heat exchangers, heaters (casing, tubes and stacks), and mechanical components of specialized equipment. Our experience includes the assessment of the following damage mechanisms:

 Brittle fracture, including tank hydrotest exemption /span>
 General and locally corroded areas, including pitting
 Laminations and blisters, HIC and SOHIC damage
 Bulges and out-of-roundness
 Crack-like flaws, including stress corrosion and fatigue crack growth
 Dents, gouges and dent-gouge combinations
 Evaluation of hot spots
 Heater tube remaining life
 Evaluation of high temperature equipment for creep and creep-fatigue damage
 Fire damage
 High Temperature Hydrogen Attack (HTHA)
 Thermal and mechanical fatigue
 Fatigue evaluation of welded joints
 Ring joint flange cracking
 Tank shell and edge settlement
 Local PWHT of weld repairs
 Modeling of weld residual stresses and incorporation into crack-like flaw assessments
 Wind-induced vibration of towers, stacks and pipelines
 Mechanical vibration
 Blast loading and other dynamic effects
 Hot tap thermal analysis

Why owners choose VELOSI for FFS

 Recognized Leader /span>
 Technical Excellence
 Sophisticated Servicing
 Practical Experience
 Focus on your profitability

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