: Several material classes (like cast iron classes I-1 and I-2) have been removed or replaced because manufacturers no longer commonly use them for pressure casings.
The , titled "Centrifugal Pumps for Petroleum, Petrochemical, and Natural Gas Industries," was released in January 2021 . This update represents a significant shift from the 11th Edition, which was co-branded with ISO 13709. The 12th Edition has officially departed from ISO co-branding and now serves as a standalone American Petroleum Institute standard. Key Technical Changes in the 12th Edition api 610 12th edition pdf
: US Customary Units are now the primary measure, with metric units provided in parentheses. Additionally, "Variable Frequency Drive" (VFD) has been standardized to "Adjustable Speed Drive" (ASD) . : Several material classes (like cast iron classes