Calculation of orifice diameter when using an orifice plate instead of a pressure reducing valve
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Pipe diameter: 25mm. Pressure before the plate: 20MPa. Pressure after the plate: 15.6MPa. Flow rate: 44 cubic meters per hour. How is the size of the orifice in this throttle plate calculated?
Two-stage orifice plates are required, with an orifice diameter of ~16.20 mm. You can carry out the calculations in accordance with HG/T 20570.15-1995 regarding the installation of flow-limiting orifice plates in pipelines. Note: The pipe diameter is too small, resulting in a high flow velocity.
Hello, I performed the calculations using standard methods, based on a single plate; the resulting pore diameter is approximately 7.8 mm. So why use a secondary pore plate? Is a single board okay? Why?
As a supplementary note, this is a gas pipeline
I’m sorry; if it’s a gas pipeline, there’s no problem. I thought it was water. I just calculated it again; for a single-stage orifice plate, the orifice diameter is around 11.85 mm.
Thank you:handshake
Could you teach me the formula for calculating the diameter of a pressure-reducing orifice in gas pipelines? Thank you!