Regarding the diameter of the safety valve outlet pipe
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Now there is a question: Suppose there are 3 safety valves in total, and the user needs to connect their discharge pipes together for drainage. If each safety valve’s discharge pipe has a diameter of 32*3.5, I wonder what diameter the pipe should have when two safety valves are connected together What about three together? Are there any standards or guidelines in this regard? Thank you all for your help. :handshake
You can take a look at API520 & API521. What you're referring to is actually the issue of using multiple safety valves in parallel. The key to the calculation is backpressure calculation and velocity calculation.