Strategically sized restrictions placed in the flow path to introduce acoustic resistance and dampen pressure waves. The Relationship Between API 618 and API 688
Yes, but with nuance. The standard applies to new designs. For existing machines, the API 688 PDF is used as a diagnostic benchmark during troubleshooting or rerating (changing operating pressure/speed). api 688 pdf
It relies on standard empirical formulas to size pulsation dampeners, acoustic filters, or surge vessels. Strategically sized restrictions placed in the flow path
: API STD 688, 2nd Edition , published in October 2023 , with Errata 1 released in March 2024 . published in October 2023
Official API standards are copyrighted and generally require purchase or authorized access: