API 510 Inspection Planning and Scheduling 2

Question 1

Under API 510, which factor is MOST important when establishing the next inspection interval for a pressure vessel?

Accepted Answer

The remaining corrosion allowance divided by the corrosion rate

Answer

The next inspection interval is primarily determined by dividing the remaining corrosion allowance by the measured corrosion rate to predict when the minimum required thickness will be reached.

Question 2

When a pressure vessel is placed in a Risk-Based Inspection (RBI) program, which output is used to drive inspection planning decisions?

Accepted Answer

Risk ranking combining probability and consequence of failure

Answer

RBI programs rank vessels by combining the probability of failure with the consequence of failure, and this risk ranking drives the inspection planning priorities.

Question 3

API 510 allows an inspector to extend the internal inspection interval beyond the normal limit under which condition?

Accepted Answer

On-stream inspection techniques are used and the risk is acceptable

Answer

API 510 permits extension of internal inspection intervals when appropriate on-stream inspection techniques demonstrate acceptable integrity and risk.

Question 4

A pressure vessel has a measured corrosion rate of 0.010 in/yr and a remaining corrosion allowance of 0.125 in. What is the calculated remaining life?

Accepted Answer

12.5 years

Answer

Remaining life = remaining corrosion allowance ÷ corrosion rate = 0.125 ÷ 0.010 = 12.5 years.

Question 5

Per API 510, the maximum internal inspection interval for a pressure vessel in normal service is:

Accepted Answer

10 years

Answer

API 510 sets the maximum internal (or on-stream equivalent) inspection interval at 10 years for pressure vessels in normal service.

(API 510) Certified Pressure Vessel Inspector Practice Test

(API 510) Certified Pressure Vessel Inspector Practice Test

API 510 Inspection Planning and Scheduling 2