safety valve
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Why are the pipes behind the safety valve low-pressure pipes, given that the pressure discharged when the safety valve activates is also quite high? For example: The set pressure of the safety valve on our hydrogen compressor is 22 MPa, while the discharge pressure is 24.2 MPa. Why then does the design team specify a pipeline pressure of 1.6 MPa after the safety valve? What is the formula used to determine the pressure in the pipeline behind the safety valve? I seek guidance from experts
Once the safety valve opens, it acts as a pressure release mechanism, allowing the pressure to be discharged either into subsequent systems or into the atmosphere; thus, lower pressure requirements are necessary.
The pressure in the pipeline behind the safety valve is 1.6 MPa; this means that there is a certain level of pressure in the outlet pipeline when the safety valve is not activated. This pressure will affect the valve’s operation
The pipeline pressure rating behind the safety valve is 1.6 MPa; it is not that there is a pressure of 1.6 MPa
In that case, for atmospheric discharge, there is no need for a higher pressure level