After what actions should a pressure test be conducted on a vessel?

After what actions should a pressure test be conducted on a vessel?

• A. Only repairs
• B. Only alterations
• C. Both repairs and alterations
• D. Regular maintenance

Answer: (C)

Conducting a pressure test on a vessel is a critical procedure to ensure the integrity and safety of the vessel after significant modifications have been made. When a vessel undergoes repairs or alterations, it can affect the structural integrity and the components of the vessel, which is why a pressure test is mandated. Repairs often involve fixing defects, such as cracks or corrosion, which can compromise the vessel's ability to safely contain pressure. Alterations may include modifications to components, such as adding new piping or changing the internal volume. Both actions can introduce new stress concentrations or affect the original design specifications, thus necessitating a pressure test to verify that the vessel can safely operate at its designed pressure without leaking. Performing a pressure test after both repairs and alterations ensures that any changes made do not compromise the vessel's safety and performance. Regular maintenance, while crucial, typically does not require a pressure test unless it involves significant repairs or modifications, which is why it is not included in the requirement for testing. Therefore, the correct choice emphasizes the importance of verifying the vessel's integrity after both types of significant work.

Conducting a pressure test on a vessel is a critical procedure to ensure the integrity and safety of the vessel after significant modifications have been made. When a vessel undergoes repairs or alterations, it can affect the structural integrity and the components of the vessel, which is why a pressure test is mandated.

Repairs often involve fixing defects, such as cracks or corrosion, which can compromise the vessel's ability to safely contain pressure. Alterations may include modifications to components, such as adding new piping or changing the internal volume. Both actions can introduce new stress concentrations or affect the original design specifications, thus necessitating a pressure test to verify that the vessel can safely operate at its designed pressure without leaking.

Performing a pressure test after both repairs and alterations ensures that any changes made do not compromise the vessel's safety and performance. Regular maintenance, while crucial, typically does not require a pressure test unless it involves significant repairs or modifications, which is why it is not included in the requirement for testing. Therefore, the correct choice emphasizes the importance of verifying the vessel's integrity after both types of significant work.