I grew up under the belief that when a PSV lifts, it gets replaced ASAP. However, this practice seems to have changed over the years. So lets see what our RAGAGEP says on the matter…
8.2 Post-relief Event
Although the interval selected for on-stream inspection should vary with circumstances and experience, a visual inspection that includes a check for leakage, vibration, and/or damage (e.g., loose fasteners, insulation, missing rain caps, deformation of components, etc.) should follow each operation of a pressure-relief device. Operating personnel assigned to the process unit may make these inspections, provided that they are experienced to recognize any leakage or vibration damage. For pressure-relieving devices in potentially fouling services, consideration should be given to servicing the pressure-relieving device as soon as possible.