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Fitness-for-Service Assessment Flashcards

7 cards from real API 510 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. In API 579-1/ASME FFS-1, what Level of assessment requires the most detailed analysis, including numerical stress analysis?

    Answer: Level 3

    Level 3 assessments require the most rigorous analysis, often including finite element analysis or other advanced numerical methods.

  2. When performing an FFS assessment for a vessel with localized metal loss, what parameter defines the 'remaining strength factor' (RSF)?

    Answer: Ratio of failure pressure with flaw to failure pressure without flaw

    RSF is defined as the ratio of the predicted failure pressure of the component containing the flaw to the predicted failure pressure of the undamaged component.

  3. Under API 579, what is the minimum acceptable RSF value (RSFa) typically used in FFS assessments when the original design code is not known?

    Answer: 0.80

    API 579-1/ASME FFS-1 specifies a default RSFa of 0.90 but the most commonly referenced minimum acceptable RSF in practice for unknown codes defaults to 0.80 per the standard's allowable limit table.

  4. A vessel has a measured minimum thickness of 0.35 inches and a calculated minimum required thickness of 0.30 inches. What is the Remaining Life if the corrosion rate is 0.010 in/year?

    Answer: 5 years

    Remaining life = (0.35 - 0.30) / 0.010 = 0.05 / 0.010 = 5 years.

  5. In FFS assessments for pressurized equipment, the term 'MAWP' refers to which of the following?

    Answer: Maximum Allowable Working Pressure

    MAWP stands for Maximum Allowable Working Pressure, the highest permissible pressure at a specific temperature for continued operation.

  6. Which API 579 Part addresses the FFS assessment of pitting corrosion damage?

    Answer: Part 5

    API 579-1/ASME FFS-1 Part 5 specifically covers the assessment of local metal loss including pitting corrosion.

  7. During an FFS Level 1 assessment for general metal loss, what is the primary tool used to screen the damaged component?

    Answer: Thickness averaging and chart-based screening curves

    Level 1 assessments use thickness averaging methods and tabulated or chart-based screening criteria that require minimal detailed calculations.