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However, note: For refinery or pipeline applications subject to API plant specifications, only is acceptable.

Single- and double-helical, one- and two-stage speed increasers and reducers of parallel-shaft design. Industries: Petroleum, chemical, and gas services. api 613 pdf free download

It does not cover general-purpose gears (covered by API 677 ) or gears integral to other equipment like integrally geared compressors (covered by API 617 ). Key Requirements of API 613 However, note: For refinery or pipeline applications subject

The American Petroleum Institute funds its standards development through the sale of these documents. The revenue supports the committees of engineers who research, debate, and update these safety standards. Downloading unauthorized copies undermines this process and constitutes a violation of copyright law. It does not cover general-purpose gears (covered by

As of 2025, the most recent active edition is (Reaffirmed: 2021). Always check for: