Which is more cost-effective: adding a pressure reducing valve or a rupture disc downstream of the self-acting control valve?
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The high-pressure nitrogen pipeline is equipped with a self-acting control valve, which is the only safety device. The process suggests that if the control valve fails, it is very likely that high-pressure nitrogen will escape, leading to safety accidents. Therefore, it is planned to install a pressure-boosting valve or a rupture disc downstream of the control valve. The question now is which option is simpler and less costly. I’d like to ask the experts here.
If you think their effects are similar, choose a pressure relief valve; it can be reused. Once a burst disc device ruptures, its diaphragm must be replaced, and the rupture of the burst disc is also considered an accident.
It still depends on your action probability; if actions are frequent, a pressure relief valve should be used. Choose a burst disc if it is not used frequently. The mechanisms of the two are different. However, the safety factor of blast discs is higher. It is the final layer of protection for the equipment.