Abstract: This paper introduces the importance and the upgrading of the API 610 specification. It compares the differences between the 11th and 12th editions of API 610 in detail and interprets them in combination with engineering practice. After 10 years of summary and improvement, the 12th edition of API 610 better conforms to the actual engineering, and provides a better selection and design reference for the majority of practitioners. Meanwhile, some requirements in the new version have not yet been applied in actual projects. In the future, all parties need to negotiate with each other, study this specification in detail, and adapt to it gradually.

Key words: API 610, centrifugal pump, 11th edition, 12th edition