API 510 Code Compliance & Safety Regulations 4

Question 1

API 510 requires that pressure vessels operating at temperatures above 750°F (400°C) in hydrogen service be assessed for:

Accepted Answer

High-temperature hydrogen attack (HTHA) per API 941

Answer

API 941 (Nelson Curves) guides assessment of High-Temperature Hydrogen Attack risk for vessels operating in hydrogen service at elevated temperatures.

Question 2

When applying an RBI program under API 510, the inspection interval derived from RBI must not exceed the maximum interval defined by:

Accepted Answer

API 510 Section 6 maximum intervals

Answer

Even with RBI justification, API 510 Section 6 establishes absolute maximum inspection intervals that cannot be exceeded regardless of low calculated risk.

Question 3

Under API 510, pressure relief devices (PRDs) protecting pressure vessels must be set at or below:

Accepted Answer

The MAWP of the protected vessel

Answer

PRDs must be set to open at or below the vessel's MAWP to prevent operation above the rated pressure.

Question 4

According to API 510, a pressure vessel inspector's primary obligation when safety and production schedules conflict is to:

Accepted Answer

Prioritize safety and code compliance over production schedules

Answer

API 510 is explicit that the inspector's primary duty is to ensure safe and code-compliant operation, which takes precedence over production considerations.

Question 5

Which of the following conditions would require a pressure vessel to be immediately removed from service under API 510?

Accepted Answer

A crack in the pressure boundary that cannot be monitored safely

Answer

An uninspectable or unmonitorable crack in the pressure boundary represents an imminent safety hazard requiring immediate shutdown.

(API 510) Certified Pressure Vessel Inspector Practice Test

(API 510) Certified Pressure Vessel Inspector Practice Test

API 510 Code Compliance & Safety Regulations 4