Process Section – Daily Hydrogenation Process Knowledge Question No. 015
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What should be done after a safety valve activates? Answer: If the pressure of the equipment becomes excessively high, causing the safety valve to activate, the pressure should be reduced immediately by using a pressure control bypass line or a flare line, so as to bring the pressure back to normal levels. Check whether the safety valve has returned to its normal position; if not, close the manual valve of the safety valve and remove it for repair.
After the safety valve activates, the pressure control valve bypass line or vent line should be opened immediately to reduce the pressure back to the normal range. Then, it is necessary to check whether the safety valve can reset automatically; if it cannot, the manual valve of the safety valve should be closed, the valve taken apart for repair, re-set at the proper pressure, and then reinstalled.
Answer: If the pressure of the equipment becomes excessively high, causing the safety valve to activate, the pressure should be reduced immediately by using a pressure control bypass line or a flare line, so as to bring the pressure back to normal levels. Check whether the safety valve has returned to its normal position; if not, close the manual valve of the safety valve and remove it for repair.
Check whether it returns to its seat properly after launching, that is, whether the safety valve still maintains a good seal as before.
If the pressure of the equipment becomes excessively high and causes the safety valve to activate, the pressure should be reduced immediately by using a pressure control bypass line or a flare line, so as to bring the pressure back to normal levels. Check whether the safety valve has returned to its normal position; if it cannot do so, close the manual valve of the safety valve and remove it for repair.
If the pressure of the equipment becomes excessively high and causes the safety valve to activate, the pressure should be reduced immediately by using a pressure control bypass line or a flare line, so as to bring the pressure back to normal levels. Check whether the safety valve has returned to its normal position; if it cannot do so, close the manual valve of the safety valve and remove it for repair.
If the pressure of the equipment becomes excessively high and causes the safety valve to activate, the pressure should be reduced immediately by using a pressure control bypass line or a flare line, so as to bring the pressure back to normal levels. Check whether the safety valve has returned to its normal position; if it cannot do so, close the manual valve of the safety valve and remove it for repair.
1. Immediately open the vent pipe valve to relieve pressure. 2. After the safety valve returns to its normal position, observe whether the container operates in accordance with the process parameters. 3. Check whether the outlet pipeline of the container is blocked, and inspect the control valve. 4. If the normal operating parameters of the container cannot be ensured, the machine should be stopped to identify the cause and carry out maintenance.
Check whether it returns to its original position properly after jumping; if not, contact the verification department promptly for verification； Check for any leaks or other issues. If the safety valve operates frequently, it may indicate that its set pressure is incorrect, and it should be sent to a calibration facility for adjustment as soon as possible. Only safety valves that have passed the verification can be put into use.
After the safety valve activates, the pressure control valve bypass line or vent line should be opened immediately to reduce the pressure back to the normal range. Then, it is necessary to check whether the safety valve can reset automatically; if it cannot, the manual valve of the safety valve should be closed, the valve taken apart for repair, re-set at the proper pressure, and then reinstalled.
1. Reduce pressure to the normal operating pressure. 2. Isolate the safety valve via a bypass line. 3. Disconnect the activated safety valve and conduct verification