scope:

1.1 Scope

1.1.1 This standard covers the minimum requirements for sealing systems for centrifugal and rotary pumps with seal sizes from 30 millimeters to 120 millimeters (1.5 to 4.5 inches). It is not practical to address all sealing requirements for petroleum applications in this standard. Therefore, the applications outside the range of −40°C to 260°C (−40°F to 500°F) and 0 bar to 34.5 bar (0 psia to 515 psia) or which involve fluids not included in Appendix B, may require engineering and seal selection other than those provided in this standard.

1.1.2 This standard is a stand alone seal standard which can be referenced by the current edition of API 610 or API 676 for new machines and can also be used to retrofit existing machines.

NOTE: A round bullet (•) at the beginning of a paragraph indicates that either a decision is required or further information is to be provided by the purchaser. This information should be indicated on the data sheets (Appendix A), otherwise it should be stated in the quotation request or the purchase order.

1.1.3 This standard is designed to default to the equipment types most commonly supplied that have a high probability of meeting the objective of at least three years of uninterrupted service while complying with emission regulations. Where standard options exist they are equivalent and acceptable. The standard (default) and standard options provide a sealing system that facilitates reliability, maintainability, and standardization. It also provides a standard seal design that has been tested and qualified under the service conditions under which it is intended to operate. The standard encourages evolving technology through qualification testing, data sheet input, and for engineered seals.

1.1.4 When seal spare parts are purchased from a seal manufacturer they will be subject to the same requirements that apply to new parts as referenced by this standard.