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First, an overview Centrifugal pump with a wide range of performance, uniform flow, simple structure, reliable operation and easy maintenance, etc. Therefore, the most widely used in industrial production. In addition to high-pressure small flow with reciprocating pumps, metering pumps used when the media containing gas with a vortex pump or positive displacement pump, viscous medium rotor pump, the rest are generally used centrifugal pump. According to statistics, in the oil and chemical plant, the use of centrifugal pumps accounted for 70% to 80% of the total pump. Centrifugal pump according to their structure can be divided into cantilever, both ends of support, vertical suspension and so on. Note: Centrifugal pump according to its shaft seal to points can be divided into a sealed pump and no seal pump (also known as no leakage pump), no seal centrifugal pump is divided into magnetic drive pump and shield pump. This article only has a sealed pump for a standard analysis. Note: This table is taken from the API610 7th Edition II, Common Criteria 1. API610 API, short for American Petroleum Institute. The purpose of publishing API 610 standards is to provide a procurement specification to facilitate the manufacture and procurement of centrifugal pumps. API 610 (Seventh Edition) was filed for centrifugal pumps in petroleum refineries under the standard name "Centrifugal Pumps for General Refinery Services." However, in fact, the API610 standard is not only used in oil refineries, but also API610 standards in the fields of petroleum, chemical industry and natural gas. To meet this need, API 610 (Eighth Edition), renamed in 1995 as "Centrifugal Pumps for Petroleum, Heavy Chemical, and Gas Industry Services" A version of the larger changes. API610 is concerned about the issue of energy saving. API 610 requires manufacturers and end users to actively seek innovative and energy-saving methods in the manufacturing, selection and operation of equipment. This method of saving energy should be encouraged if it increases efficiency and reduces the total cost of use without sacrificing safety or reliability. In addition, the evaluation criteria for the selection of equipment should be based on the total cost of the equipment over its useful life, rather than the equipment procurement costs. In the oil and chemical industries, the use of API610 standard occasions. International Organization for Standardization also adopted the API610 standard, paid to the standard number ISO / CD13709. The current version of the API 610 is the ninth version released in 2003 and the ninth version requires fewer requirements than the eighth version. As the new version of the pump factory adopted a number of molds involved in the re-production, so far, pumps manufactured by the pump plant are basically pumps of the 6th, 7th or 8th edition. 2. ISO5199 ISO is the abbreviation of International Organization for Standardization. ISO5199, Technical Specification for Centrifugal Pumps, Class Ⅱ (Centrifugal Pump Technical Specifications Class Ⅱ), mainly based on the German DIN standard. Its dimensions, performance in line with ISO2858 standard; base in line with ISO3661; mechanical seal or soft packing cavity size in line with ISO3069; performance test B level with ISO3555, C level with ISO2548. ISO5199 (including national standards equivalent to or equivalent to this standard) is applicable to horizontal cantilever centrifugal pumps, OH1 and OH2 in Table 1. Centrifugal pumps complying with ISO5199 (including national standards equivalent or with reference to the standard) are called ISO pumps. China's GB5656 / T, Germany's DIN ISO5199, France's NF ISO5199 equivalent using ISO5199; Britain's BS6836 equivalent with ISO5199. China's GB5662, Germany's DIN24256, Britain's BS5257, France's NF E44121, the equivalent or equivalent using ISO2858. 3. ASME B73.1M / B73.2M ASME is short for The American Society of Mechanical Engineers. ASME B73.1M - 1991 Specification for Horizontal End Suction Centrifugal Pumps for Chemical Process and ASME B73.2M - 1991 Specification for Vertical In-line Centrifugal Pumps for Chemical Process (Vertical Pipeline Chemical Centrifugal Pump) is a national standard of the United States. It is jointly prepared by the pump factory and the chemical factory. The ASME B73.1M standard is only applicable to the foot-mounted horizontal cantilever centrifugal pump, OH1 in Table 1. The ASME B73.2M standard applies to vertical pipe centrifugal pumps, OH3, OH4, OH5 in Table 1. The remaining ASME chemical pump standards are: ASME B73.3M - 1996 Specification for Thermoplastical and Thmoset Polymer Material Horizontal End Suction Centrifugal Pumps for Chemical Process. ASME B73.5M - 1995 (Horizontal Axial Inhalation Thermoplastics, Thermoset Resin Chemical Centrifugal Pumps) Specification for Sealless Horizontal End Suction Centrifugal Pumps for Chemical Process. Chemical centrifugal pumps meeting ASME / ANSI standards are called ANSI pumps. 4. GB3215 China National Standard GB3215 - 1989 "Common technical conditions of centrifugal pumps for refineries, chemical and petrochemical processes" are basically based on API610 6th Edition. 5. GB / T5656 Chinese national standard GB / T5656 - 1994 "single-stage, single-suction chemical centrifugal pump technical conditions" with reference to ISO5199 compiled. Its relevant standards such as GB5662 "axial suction centrifugal pump (16Bar) label, performance and size" refer to ISO2858, GB5661 "axial suction centrifugal pump mechanical seal and soft packing cavity size" with reference to ISO3069, GB5660 "axial suction centrifugal Pump base and mounting dimensions "according to ISO3661. Hydraulic performance test according to GB3216 "centrifugal pump, mixed flow pump, axial flow pump and the vortex pump test method" C or B level (refer to ISO2548, ISO3555). 6. SH / T3139 China Petrochemical Industry Standard SH / T3139 - 2004 "Technical Specification for Heavy-Duty Centrifugal Pumps for Petrochemical Industry" is edited by China Petrochemical Corporation Shanghai Engineering Co., Ltd., Sinopec Engineering Construction Company, Sinopec Luoyang Petrochemical Engineering Company, China Petrochemical Group Ningbo Engineering Co., Ltd. Participation. SH / T3139 standard mainly refers to the American Petroleum Institute standard API610, combined with the characteristics of China's petrochemical industry, supplement or make some new regulations. This standard not only reflects the current technical level of the heavy duty centrifugal pump industry at home and abroad, but also serves as the basic requirement of the petrochemical industry for heavy duty centrifugal pumps for industrial installations and is applicable to the engineering design and procurement of heavy duty centrifugal pumps in China's petrochemical industry. The main contents include the principles to be followed in the performance design, structural design, material selection and reasonable design and configuration of important components of heavy duty centrifugal pumps. At the same time, it also proposes auxiliary equipment, auxiliary piping system as an important part of the unit, , Control and instrumentation should comply with the guidelines; also test, test, packaging, transportation and data preparation of the unit put forward requirements. 7. SH / T3140 China Petrochemical Industry Standard SH / T3140 - 2004 "Technical Specifications for Light-duty Centrifugal Pumps in Petrochemical Industry", edited by China Petrochemical Corporation Shanghai Engineering Co., Ltd., Sinopec Engineering Construction Company, Sinopec Luoyang Petrochemical Engineering Company , SINOPEC Ningbo Engineering Co., Ltd. SH / T3140 standard mainly refers to the international standard ISO 5199, and combined with the characteristics of China's petrochemical industry, supplement or make some new regulations. This standard not only reflects the current domestic and foreign medium and light load centrifugal pump industry's technical level, but also as the petrochemical industry on industrial installations with medium and light load centrifugal pump basic requirements applicable to China's petrochemical industry, light-load centrifugal pump Engineering Design and Procurement. The main contents include the principles to be followed in performance design, structural design, material selection, rational design and configuration of important components of medium and light load centrifugal pumps, as well as auxiliary equipment and auxiliary pipes which are important components of the unit System, control and instrumentation should comply with the guidelines; also test and test the unit, packaging, transportation and data preparation and other aspects of the requirements. Third, the standard selection 1. Medium and light load centrifugal pump, light load centrifugal pump is able to meet all of the following conditions centrifugal pump: The parameter range should also meet: Rated discharge pressure is less than or equal to 1.9MPa Pump temperature (medium temperature) Rated Speed ​​(+ 5% for turbine drive) is less than or equal to 300