本标准规定了石油、天然气和化学工业用离心泵和旋转泵密封系统的要求和建议。见A.1.1和A.1.2。买方或密封件供应商有责任确保所选密封件和辅助设备适合预期的使用条件。它主要适用于危险、易燃和/或有毒服务，其中需要更高程度的可靠性来提高设备可用性，并减少对大气和生命的排放- 循环密封成本。它覆盖直径为20 mm（0.75 in.）的泵轴密封件至110毫米（4.3英寸）。本标准也适用于密封备件，可供现有设备升级参考。提供了本标准涵盖的密封配置分类系统，包括类别、类型、布置和方向。API 610规范性引用了本标准。适用于新泵和改装泵，以及除API 610泵（e。 g、 ASME B73。1，ASME B73。2和API 676泵）。本标准也可供其他机械标准参考，如其他泵、压缩机和搅拌器。用户应注意，本标准并不是专门针对购买者可能指定的所有潜在应用而编写的。对于API 682密封件规定的尺寸封套，尤其如此。买方和密封件供应商应就本标准中的特征以及应用中使用的特征达成一致。

This standard specifies requirements and gives recommendations for sealing systems for centrifugal and rotary pumps used in the petroleum, natural gas, and chemical industries. See A.1.1 and A.1.2. It is the responsibility of the purchaser or seal vendor to ensure that the selected seal and auxiliaries are suitable for the intended service condition. It is applicable mainly for hazardous, flammable, and/or toxic services where a greater degree of reliability is required for the improvement of equipment availability and the reduction of both emissions to the atmosphere and life-cycle sealing costs. It covers seals for pump shaft diameters from 20 mm (0.75 in.) to 110 mm (4.3 in.).This standard is also applicable to seal spare parts and can be referred to for the upgrading of existing equipment. A classification system for the seal configurations covered by this standard into categories, types, arrangements, and orientations is provided.This standard is referenced normatively in API 610. It is applicable to both new and retrofitted pumps and to pumps other than API 610 pumps (e.g. ASME B73.1, ASME B73.2, and API 676 pumps).This standard might also be referenced by other machinery standards such as other pumps, compressors, and agitators. Users are cautioned that this standard is not specifically written to address all of the potential applications that a purchaser may specify. This is especially true for the size envelope specified for API 682 seals. The purchaser and seal vendor shall mutually agree on the features taken from this standard and used in the application.