A: API typically reviews and revises standards every 5 years. The current version was reaffirmed in 2020. Always check the revision date in your API 688 PDF (look for "API Std 688, First Edition, Date...").
Yes. Electric fracturing pumps are still positive displacement reciprocating pumps. The pulsation and vibration physics are identical; only the prime mover changes. api 688 pdf
API 688 specifies minimum sizing and performance criteria for suction and discharge pulsation dampeners. The standard distinguishes between: A: API typically reviews and revises standards every
Dampeners must reduce the dominant pulsation frequency amplitude by at least 80% unless otherwise justified by a risk assessment. api 688 pdf
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