Can the safety valve vent pipeline and the process vent pipeline be combined?
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Most of the designs encountered are of this type: the vent gases from safety valves are collected in one pipeline and, after passing through a buffer tank, sent to exhaust gas treatment or a flare; the vent gases from containers that remain under normal pressure are also collected in one pipeline and sent to exhaust gas treatment or a flare. May I ask, is there any basis for such a design?
Under normal circumstances, it is not recommended to combine the safety valve vent pipe with the process vent pipe. Since the purposes and operating conditions of these two are different, a safety valve is activated when the equipment exceeds its maximum allowable operating pressure in order to protect the equipment and personnel; its discharge volume and pressure are usually high ； Process venting is used for pressure regulation during normal operation, and its volume and frequency are relatively low. The merger may affect the proper operation of safety valves and the normal functioning of the process system, and it could also lead to excessive loading on the treatment facilities. For safety and operational reasons, each venting system should be designed independently in accordance with relevant specifications. .
The vent pipes of safety valves are specified according to requirements, especially for toxic and flammable/explosive media