Risk-Based Inspection and Management Flashcards
7 cards from real API practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Risk-Based Inspection and Management flashcards as text
In RBI methodology, what term describes the scenario where a small leak does not immediately progress to a large rupture?
Answer: Leak-before-break (LBB)
Leak-before-break describes the condition where a through-wall crack produces a detectable leak before it grows large enough to cause catastrophic rupture, which is favorable for inspection-based risk management.
Which inspection effectiveness category in API 581 is assigned when inspection has a high confidence of detecting damage if it is present?
Answer: Category A — Highly Effective
API 581 Category A (Highly Effective) is assigned when the inspection technique and coverage provide high confidence (>90%) of detecting the damage mechanism if present.
A refinery piping circuit has high susceptibility to high-temperature hydrogen attack (HTHA). Which Nelson Curve parameter is most critical for the RBI damage factor calculation?
Answer: Operating temperature and hydrogen partial pressure
The Nelson Curves plot temperature vs. hydrogen partial pressure to determine susceptibility to HTHA, making these two parameters critical inputs for the damage factor.
According to API 580, what is the correct sequence of steps in developing an RBI program?
Answer: Plan → Data collection → Risk analysis → Inspection plan → Implementation → Reassessment
API 580 prescribes a systematic sequence: plan the program, collect data, perform risk analysis, develop inspection plans, implement them, then periodically reassess.
What is 'risk target' or 'risk tolerance' as used in API 580 RBI programs?
Answer: The threshold risk level above which more frequent or enhanced inspection is required
A risk target defines the acceptable risk level; equipment exceeding this threshold triggers more intensive inspection or mitigation to reduce risk below the target.
In API 581, the 'flammable consequence' calculation estimates the affected area based on which primary parameters?
Answer: Fluid phase, release rate, fluid properties, and ignition probability
Flammable consequence area in API 581 depends on the release rate (driven by hole size and fluid state), fluid flammability properties, and the probability that the release ignites.
What is the main advantage of integrating RBI results with a Computerized Maintenance Management System (CMMS)?
Answer: It links risk-based inspection schedules directly to work order generation and tracking
Integrating RBI with CMMS ensures inspection due dates and task details automatically generate work orders and are tracked to completion, closing the loop on risk management.