API 510 Fitness-for-Service Assessment 2

Question 1

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

Accepted Answer

Level 3

Answer

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

Question 2

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

Accepted Answer

Ratio of failure pressure with flaw to failure pressure without flaw

Answer

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.

Question 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?

Accepted Answer

0.80

Answer

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.

Question 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?

Accepted Answer

5 years

Answer

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

Question 5

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

Accepted Answer

Maximum Allowable Working Pressure

Answer

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

(API 510) API 510 Inspector Certification Practice Test

(API 510) API 510 Inspector Certification Practice Test

API 510 Fitness-for-Service Assessment 2