Minor damage—such as scratches or pits less than 0.005 inches deep—can often be resolved through polishing or blending. Why Compliance Matters API Recommended Practice 687, 2nd Edition

The standard is organized into distinct chapters, typically covering:

API 687 references and works in conjunction with numerous other API standards, including:

Guidance on bladed rotor assemblies and casing fits.

Unlike routine maintenance, API 687 addresses complex repairs involving:

The standard ensures that repairs return components to a safe, reliable state capable of at least of uninterrupted operation. what vs. why and API 687 Intro - All About Turbo

Now to the core query: Please be aware of copyright and compliance issues.

Specific cleaning, inspection, and repair techniques for impellers and shaft assemblies.

A compliant API 687 rotor repair follows a strict, sequential engineering workflow. Skipping any of these phases can compromise the final balance, structural integrity, or operating lifespan of the machine.

As equipment technology continues to evolve, so too will the standards that govern their repair. The second edition of API 687 represents a significant step forward, but the industry can expect continued refinement and expansion.

The 2nd edition of API RP 687 significantly expands the scope of the original 2001 release. While the first edition focused almost exclusively on rotor repairs, the updated version provides comprehensive guidance for both rotors and stationary components.