Page 322 - Compression Machinery for Oil and Gas

Screw Compressors Chapter 6 307

If applied properly, orifice plates can be used in screw compressor piping
systems to significantly reduce pulsation amplitudes. Typically, an orifice is
simply a metal plate with a single hole/bore. Some research has concluded
that multi-hole orifices are more effective at reducing pulsation amplitudes
at frequencies higher than approximately 100Hz.

References

[1] American Petroleum Institute (API), API 619 Ed. 5/ISO10440-1-2007, API Standard Para-
graphs Petroleum, Petrochemical and Natural Gas Industries—Rotary-Type Positive-
Displacement Compressors, 2010.
[2] W. Ker Wilson, Practical Solution of Torsional Vibration Problems (With Examples from
Marine, Electrical, Aeronautical, and Automobile Engineering Practice), third ed. revised,
vols. I–IV, John Wiley & Sons Inc., 1956.
[3] American Petroleum Institute (API), API 684 Ed. 2, API Standard Paragraphs Rotordynamic
Tutorial: Lateral Critical Speeds, Unbalance Response, Stability, Train Torsionals, and Rotor
Balancing, 2010.