Distance of upstream pipe fittings from the orifice flow meter
Thread Content
Dear experts, regarding the upstream fittings of orifice flow meters and the definition of distance: if there are two or three fittings, how should the distance be defined? As shown in the figure. Are there any specific requirements for the distance between the second and third fittings and the orifice plate?
The distance is of course calculated from the nearest one, right?
Is there anyone who can help me understand the issue regarding the distance of the second fitting?/
There are no specific requirements regarding the distance between the second and third fittings and the orifice plate; however, when these fittings affect the measurement performed by the orifice plate, the pipe section upstream of the orifice plate flow meter must be extended to eliminate such effects.
I hope there is data support, such as a manual or something.
The detailed requirements for straight pipe sections are provided in the appendix of GB 50093-2013, Code for Construction and Quality Acceptance of Automatic Instrumentation Projects
I opened it and checked, but couldn’t find this requirement; moreover, I am working on a project abroad. Is there a Miller Flowmeter Handbook?
Thank you, but where is it specified the distance requirement between the second upstream fitting and the first fitting? Seeking advice from experts
It’s very good material, but the tables still do not clearly indicate the distance from the second upstream fitting to the first fitting.