Should the flow control orifice plate be installed on a horizontal pipeline or a vertical pipeline?
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If a single-hole flow control orifice plate is installed in a horizontal pipe, how can the gas above the opening of the orifice plate be discharged? If it is installed in a vertical pipe, such problems will not occur. I’m not sure if what I’m saying is correct; everyone is welcome to discuss it.
Either horizontal or vertical is fine; as long as it complies with HG20570 standards, that’s correct
When installed in the horizontal section, will there be a gas phase space above the orifice of the orifice plate?
No, in cases where there is a gas space, it can be considered as a situation similar to the inlet reducer of a pump. If the storage tank is located at a higher elevation while the pump is on the ground, then the reducer will be offset horizontally, and this gas space can cause air entrapment in the pump. Upon performing several calculations using the orifice plate method, it becomes clear that if the orifice plate is considered to be a reducing element, then in such cases of a large diameter change, it will be treated as multiple orifices rather than a single orifice. In other words, for a single orifice plate, the pressure difference and flow rate do not change significantly, and the difference between the orifice diameter and the pipe diameter is not very large, so the impact is minimal.