While it may be tempting to search for a "free download" of API Standard 687

The core objective of API 687 is to provide a comprehensive framework for the inspection and repair of rotors, bearings, and couplings. It is specifically designed for "special-purpose" equipment, which typically refers to machinery that is critical to a plant's operation and lacks a standby spare. By establishing standardized procedures, the document helps operators:

What About Old Versions?

Some websites circulate copies of API 687 First Edition (2001) . While these are no longer the current standard (the latest edition is 2019 or later, with possible reaffirmations), the copyright still applies to all editions. Even obsolete versions cannot be legally distributed without permission.

Free Download: Unfortunately, I couldn't find a free and official download link for the API 687 PDF. The American Petroleum Institute (API) typically requires a purchase or a subscription to access their standards.

2) Lawful ways to access the standard

  • Purchase from API: The authoritative source is API’s online store (standards.api.org). Buying ensures you get the latest, official revision and licensing.
  • Industry memberships: Many companies and engineering organizations subscribe to API standards—ask your employer or professional society for access.
  • Standards resellers: Authorized standards distributors (Techstreet, IHS Markit, SAI Global) sell licensed PDFs.
  • University or public library: Academic libraries often have standards subscriptions; use your institution’s library portal or interlibrary loan.
  • Regulatory citations: If a government regulation or contract cites API 687, an agency may provide a read-only copy for compliance purposes—check the relevant regulator’s website.
  • Contact API or authors: For limited-use excerpts or clarification, contact API or the committee responsible for the standard.

Prohibited Repairs: It specifically prohibits the use of plasma spray, plating, or metalizing for repairing bearing journals, seal areas, and impeller fits unless otherwise specified.

  • Are out of date or incomplete.
  • May be unauthorized copies infringing copyright.
  • Could contain malware when downloaded from untrusted sites.

API Recommended Practice 687 establishes the minimum requirements and comprehensive guidelines for the inspection and repair of special-purpose rotating equipment