How to calculate the safety valve for high-temperature hot water pipes? I would appreciate some guidance from those with experience!
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How to calculate the safety valve for high-temperature hot water pipes? 1.8 MPa, hot water pipeline at 150°C; the safety valve is connected to the atmosphere. How should the safety valve be sized? I would appreciate guidance from those with experience. Thank you!
Techniques for selecting safety valves https://bbs.hcbbs.com/thread-715925-1-1.html (Source: Haichuan Chemical Industry Forum) Issues to consider when selecting and installing boiler safety valves https://bbs.hcbbs.com/thread-1576079-1-1.html (Source: Haichuan Chemical Industry Forum)
Thank you. I’m now wondering what the leakage rate is? Liquid pipeline, with steam being discharged
For specific calculations, please refer to the design specifications
As mentioned in Section 3.14.2 of the SY10043 Pressure Relief and Depressurization System Guidelines, the size of the hydraulic expansion relief device can be 3/4in*1in.
Thank you. If we consider an increase in upstream pressure, how is the discharge volume calculated?
HG20570 provides various classifications for the calculation of safety valves; in cases where multiple conditions exist, the maximum value from the calculations is taken
This situation is not specified in the standards. Given the high pressure from the upstream supervisor, can we use the maximum flow rate of the pipeline as the basis for calculating the discharge volume? Thank you
Isn’t what you’re referring to the same as the safety valve designed as a result of a failure in the upstream high-pressure valve? This standard includes
Found it, thanks! For liquid-phase pipelines, the discharge capacity of the safety valve is the difference between the maximum flow rate that the control valve can handle and the normal flow rate, and it is also necessary to determine whether there is any flashing of the material on the high-pressure side.
This post was last edited by henglinkou on 2020-4-11 at 11:28. With a pressure of 1.8 MPa and water at 150°C, when the safety valve opens, the phase state passing through the valve’s orifice is considered to be liquid; some vaporization occurs after the water exits the safety valve. Therefore, the volumetric flow rate of discharge from the safety valve is still considered based on a liquid state. For liquid pipelines, if the overpressure is caused by thermal expansion and the discharge volume is small, it is not necessary to calculate the discharge volume; in such cases, a DN25 micro-acting safety valve can be used directly. If the overpressure is caused by high pressure at the source, the discharge volume is the flow rate at the source. The safety valve calculation sheet I prepared is for trial use.