In the design of safety valves, regulations regarding the rupture of the heat exchanger tube bundle state that when the pressure on the low-pressure side is 2/3 lower than that on the high-pressure side, it should be considered as an emergency scenario
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In the design of safety valves, regulations regarding the rupture of the heat exchanger tube bundle state that when the pressure on the low-pressure side is 2/3 lower than that on the high-pressure side, it should be considered as an emergency scenario. What about vacuum systems? For example, if the shell side contains negative-pressure steam/condensate and the tube side contains condensate, is it then necessary to install a safety valve? If needed, how to set it up
Designed in accordance with API650.
“In the design of safety valves, the provisions regarding the rupture of the heat exchanger tube bundle state that when the pressure on the low-pressure side is 2/3 lower than that on the high-pressure side, it should be considered as an emergency condition; this refers to the design pressure. Therefore, by increasing the design pressure on the low-pressure side, it may not be necessary to install a safety valve. If increasing the design pressure on the low-pressure side is not feasible, then the setting pressure for the safety valve should be no higher than the design pressure of the equipment in the low-pressure system.
If the design pressure is not increased, then is a negative pressure safety valve being installed?
This post was last edited by bfdlwolf on 2018-12-4 at 14:06. It is not negative pressure, but rather the design pressure of the equipment in the low-pressure side system.