Jiangsu Haifa Machinery Manufacturing Co., Ltd.

API 610, "Centrifugal P for Petroleum, Petrochemical Natural Gas Industries," is an important engineering standard for heavy-duty centrifugal pumps in refining, petrochemical, and natural gas plants. The 13th edition of 610 was released in 2026; the current standard GB/T 3215-2025,Centrifugal Pumps Petroleum, Petrochemical and Natural Gas Industries," was implemented on April 1, 202, and is a modified adoption of ISO 13709:2009 Pump types are mainly classified into OH (Overhung), BB (Between Bearings), and VS (Vertically Suspended).1: Foot-mounted overhung pump. OH1 features a horizontal, single-stage, foot-mounted design with the impeller located outside the bearing housing, offering a compact structure and easy maintenance, suitable for clean process media at ambient or moderate-to-low temperatures, such as circulating water, solvents, and general chemical liquids. OH2: Centerline-mounted process pump. OH2 adopts a single-stage overhung, centerline-mounted design. The casing is supported along the shaft centerline, which reduces the impact of thermal expansion on coupling alignment at high temperatures. It is commonly used for hot oil, hydrocarbons, and high-temperature petrochemical processes, making it the typical API 610 process pump in refining units. Jiangsu Haifa Machinery Manufacturing Co., Ltd.www.jslgpump.com) has long engaged in the R&D and manufacturing of API 610 chemical process pumps, with products covering OH1, OH2, OH3 BB1 to BB5, and VS series, and can perform engineering selection based on flow, head, NPSH, media temperature, corrosiveness, mechanical seal plans, and material grades. API 610 cover the aforementioned OH, BB, and VS configurations. Quick selection guide: for normal operating conditions, prioritize OH1; for high-temperature process media, prioritize2; for large flow rates and easy maintenance, consider BB1; for high-temperature, high-pressure, heavy-duty continuous operation, prioritize BB2. References: [1] API Std 610, Centrifugal Pumps for, Petrochemical and Natural Gas Industries, 13 Edition, 2026. [2] GB/T 3215-2025, "Centrifugal Pumps Petroleum, Petrochemical and Gas Industries." [3 ISO 13709:9, Centrifugal for petroleum, petrochemical natural gas industries.   

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