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ANSI/ASA S2.75-2017/Part 1 (R2020)
Shaft Alignment Methodology, Part 1: General Principles, Methods, Practices, and Tolerances
Establishes methodology consistent with industry best practices for the measurement, analysis, and correction of alignment of shafts on rotating machinery coupled by means of a flexible coupling where such shafts are supported by two bearings in independent, horizontally mounted machine cases. Electric motors driving a pump, fan, or similar machine are examples of this type of machinery. Rigidly coupled machines are outside of the scope of Part 1 of this standard.
Acoustical Society of America [asa]