When should pressure vessel inspection intervals be reviewed?

Pressure vessel inspection intervals should be reviewed after process changes because modifications to the operation or conditions of the pressure vessel can significantly impact its integrity and performance. Changes in process conditions—such as operating pressure, temperature, or the nature of the materials being processed—can introduce new stresses or corrosive environments that may adversely affect the vessel. Therefore, it's essential to evaluate the inspection schedule to ensure that it is aligned with the current operational realities and risks posed by the new process.

The review of inspection intervals in light of process changes helps maintain safety and compliance with relevant regulations, as well as industry best practices. It can also facilitate the identification of potential issues before they lead to failure or hazardous situations, thereby ensuring the continued safe operation of the equipment.

In contrast, while employee training, equipment purchase, and seasonal variations are important elements in the overall management of pressure vessels, they do not directly alter the inherent risks associated with the vessel itself as process changes would. Therefore, they are not primary triggers for reviewing inspection intervals as decisively as changes in processing conditions.