For equipment owners, the new edition offers valuable guidance in selecting a repair shop, as well as implementing improved industry practices.
API 687 also references standards from other organizations, including:
: Applied to lower-stress components like oil seals and main bodies Residual Magnetism
Utilizing controlled chemical or mechanical cleaning (such as bead blasting) to remove process fouling without altering base metal dimensions.
The API 687 standard provides guidelines for the repair and reconditioning of rotors used in API 6A and 6D valves. By following the API 687 rotor repair process and downloading a PDF version of the standard, valve owners and repair shops can ensure that rotors are repaired to meet the required performance and safety standards.
: Includes methods such as welding for major erosion or corrosion, while strictly prohibiting certain methods like plasma spray for critical fits. Inspection & Acceptance Criteria
Proper application of API 687 helps address a broad range of equipment repair challenges, from performance inefficiencies to reliability concerns. Following the standard ensures that repaired rotors maintain their critical speed margins and torque transmission capabilities, which are essential for safe and efficient operation.
Originally titled "Rotor Repair" in its 2001 first edition, the standard has since evolved significantly. The second edition, published in October 2023 (with Errata 1 issued in May 2024), represents a major expansion in scope and technical depth.