Inspection Planning and Scheduling 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.
Read the first 7 Inspection Planning and Scheduling flashcards as text
Under API 510, which factor is MOST important when establishing the next inspection interval for a pressure vessel?
Answer: The remaining corrosion allowance divided by the corrosion rate
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.
When a pressure vessel is placed in a Risk-Based Inspection (RBI) program, which output is used to drive inspection planning decisions?
Answer: Risk ranking combining probability and consequence of failure
RBI programs rank vessels by combining the probability of failure with the consequence of failure, and this risk ranking drives the inspection planning priorities.
API 510 allows an inspector to extend the internal inspection interval beyond the normal limit under which condition?
Answer: On-stream inspection techniques are used and the risk is acceptable
API 510 permits extension of internal inspection intervals when appropriate on-stream inspection techniques demonstrate acceptable integrity and risk.
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?
Answer: 12.5 years
Remaining life = remaining corrosion allowance ÷ corrosion rate = 0.125 ÷ 0.010 = 12.5 years.
Per API 510, the maximum internal inspection interval for a pressure vessel in normal service is:
Answer: 10 years
API 510 sets the maximum internal (or on-stream equivalent) inspection interval at 10 years for pressure vessels in normal service.
Which document is MOST critical to review when planning an internal inspection of a pressure vessel?
Answer: The vessel's inspection history, prior thickness data, and last inspection report
Prior inspection reports, thickness measurements, and inspection history are essential inputs for planning the scope and focus areas of an upcoming internal inspection.
If a pressure vessel's calculated inspection interval based on corrosion rate would exceed the API 510 maximum allowable interval, which interval governs?
Answer: The API 510 maximum allowable interval
API 510 maximum allowable intervals are absolute limits; even if the calculated corrosion-based interval is longer, the code maximum governs.