Safety valve back pressure
Thread Content
There is a safety valve pipeline; the set pressure of this safety valve is 1.6 MPa. The outlet of the safety valve leads to another vent main, to which gas venting pipelines are connected, and the discharge pressure for these gases is 1.5 MPa. During design, can the outlet pipeline of the safety valve be connected to this main?
The back pressure is determined by the flare network, typically ranging from 0.5 to 2.0 bar.
Whether the pressure at the key connection point meets the backpressure requirements specified in the safety valve calculation sheet
The design manual states that if the safety valve vents directly to the atmosphere, it requires its own pipe, and it cannot be connected to a common pipe
The design manual states that if the safety valve vents directly to the atmosphere, it requires its own pipe, and it cannot be connected to a common pipe
Could you elaborate? Is it sufficient that the inlet pressure is not greater than the back pressure specified in the safety calculation sheet?
If the pressure at the inlet is higher than the backpressure specified in the calculations, then the discharge capacity of the safety valve will not be sufficient. Additionally, it is necessary to consider whether the pipe diameter is adequate for discharging both materials together.