Introduction to the mechanical seal API682 standard-

Brief introduction of mechanical seal API682 standard

　2019-08-05　　

Brief introduction of mechanical seal API682 standard:

API682 'Shaft Seal System for Centrifugal Pump and Rotor Pump' was first promulgated by the American Petroleum Institute in October 1994. The purpose is to obtain the most commonly used and proven successful mechanical seal application program in oil refineries. It is not a special standard for mechanical seals, but a standard for pump mechanical seals manufactured for API682 and API676 standards. The first edition of the API682 standard contains about 90% of the 5 basic types of mechanical seals, seven areas and three tests used in oil refineries. The API682 standard can guarantee that the mechanical seal and its system can be used continuously for three years, and the leakage child can meet the requirements of process equipment and environmental protection. Its applicable scope is: temperature -40~260℃, pressure 0~3.45MPa, shaft diameter 30~120mm. Sand mill mechanical seal

The second and third editions of API682, which came out in 2002 and 2004 respectively, have made considerable additions and supplements in many places, expanding the scope of application of the standard, and can be applied to more types of pumps, The new sealing design documents, piping system diagrams and new test requirements are mainly to improve the reliability of the design and meet the requirements of environmental protection for leakage. In general, the second and third editions of the API682 standard have a wider range of applications and are easier to accept in the international market. The second and third editions of the API682 standard have been recognized by ISO. In October 2002, the ISO21049 (150.21049.2001) standard API682 standard 'Petroleum Industry Heavy Chemical Industry Natural Gas Industry Centrifugal Pump' (ninth edition) was issued. The default seal selection Sealed for API682.

As an independently applicable sealing standard, API682 can be referenced by the current versions of API610 (ISO13709), ASMEB73.1, ASMEB73.2 and API676 for new pumps and for existing retrofit pumps. At the same time, the seal in this standard can also be used in non-API610 pumps.

API682 specifies requirements and recommendations for the sealing system of centrifugal pumps and rotor pumps used in the petroleum, natural gas and chemical industries, mainly describing shaft sealing systems for hazardous, flammable and toxic purposes In order to improve the reliability of the equipment and reduce the cost of emissions to the atmosphere and the life cycle of the seal, higher reliability of the shaft sealing system is proposed in these applications.

The sealing configuration included in API682 involves three types of sealing (C1, C2, and C3), three types of sealing (A, B, and C, and three types of sealing arrangements (A1, A2, and A3). 　　1101.html,

The basic process of the mechanical seal system function: impurity removal and filtration 　　 mechanical seal API682 standard seal category