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, officially titled "Pulsation and Vibration Control in Positive Displacement Machinery – Reciprocating Compressors Systems," is a definitive guideline published by the American Petroleum Institute (API). It establishes minimum requirements for the analysis, measurement, and control of pulsation-induced vibrations in reciprocating compressor systems.

The primary goal is to avoid the coincidence of mechanical natural frequencies with significant pulsation or excitation frequencies to prevent resonance-related failures. Availability: api 688 pdf

API 688 provides the minimum requirements and engineering guidance to prevent fatigue, structural damage, and mechanical failure caused by pulsations in piping systems. It is used across the petroleum, chemical, and natural gas industries for several types of equipment: Southwest Research Institute Reciprocating Compressors (referenced alongside Rotary-type Positive Displacement Compressors (referenced with API 619). Positive Displacement Pumps (reciprocating, controlled volume, and rotary types). Southwest Research Institute Standard Content The standard is divided into two primary parts: Part 1: Fundamentals , officially titled "Pulsation and Vibration Control in

: Primarily used in petroleum, chemical, and natural gas industry services. Key Technical Contents The standard is generally divided into two main parts: Description Part 1 Fundamentals Availability: API 688 provides the minimum requirements and