ASA S2.75-2021/Part 3

This standard establishes methodology consistent with industry best practices for the measurement, analysis, and correction of alignment of shafts on vertically oriented rotating machinery coupled by either flexible or rigid type couplings. Examples of different types of vertically oriented pumps are discussed but the measurement, analysis, and correction principles will apply to any type of rotating machinery where the shafts are oriented in a position other than pure horizontal. The standard addresses conditions for machinery mounting, acceptability criteria for spigot fits on machine casings, and acceptability guidelines for vertically oriented shafts with rigid couplings. Ancilliary information is provided in five Annexes.