knapee
Petroleum
- Mar 9, 2011
- 100
Dear Sir/Madam
sorry to bother your all this trivial.
Thermal expansion relief valves are required in liquid-full systems if the system can be blocked in and/or subjected to heat input from the atmosphere or process that results in overpressure.
The question is below (please see attached file):
Q1.PSV set pressure should follow the Design pressure for the equipment protected (in this example HX DP= 22 kg/cm2g) or follow the downstream header pressure design pressure(in this example
hot oil return header = 11kg/cm2g)
Q2.This HX located around 7 m so is the fire case scenario should be consider or thermal expansion scenario case should be considered ? But, in this example, the fluid is hot oil and it should not vaporized
so fire case may not be in the consideration. Am I right?
Q3. About thermal expansion case, is the method in my post attachment appropriated right or not?
Thank you so much.
sorry to bother your all this trivial.
Thermal expansion relief valves are required in liquid-full systems if the system can be blocked in and/or subjected to heat input from the atmosphere or process that results in overpressure.
The question is below (please see attached file):
Q1.PSV set pressure should follow the Design pressure for the equipment protected (in this example HX DP= 22 kg/cm2g) or follow the downstream header pressure design pressure(in this example
hot oil return header = 11kg/cm2g)
Q2.This HX located around 7 m so is the fire case scenario should be consider or thermal expansion scenario case should be considered ? But, in this example, the fluid is hot oil and it should not vaporized
so fire case may not be in the consideration. Am I right?
Q3. About thermal expansion case, is the method in my post attachment appropriated right or not?
Thank you so much.
