Conducted on rigid stands to correct gross static and couple unbalance.
The primary aim is to restore rotor dimensions to "as-new" or latest design specifications, ensuring safe, reliable operation for a minimum of 5 years of uninterrupted service.
The or the specific repair method you are evaluating (e.g., journal scoring, impeller cracking, shaft runout).
The utility of RP 687 is increased when considered alongside , which acts as a complementary resource addressing the inspection and repair of industry pumps. Together, these standards provide the industry with a broad range of repair techniques and recommendations for equipment, addressing everything from small pumps to large turbomachinery. Api 687 Rotor Repair Pdf Download--------
Hidden flaws can be more dangerous than visible damage. API 687 outlines stringent NDT protocols:
For minimal material loss, HVOF coatings (such as tungsten carbide or chrome carbide) can be applied. The standard requires rigorous bond-strength testing to ensure the thermal spray layer will not delaminate under high shear stresses. Mechanical vs. Electrical Runout
The overhauling process is typically divided into distinct phases to ensure thorough assessment before repair: Phase I Inspection Conducted on rigid stands to correct gross static
Clear comparisons of journal diameters, seal clearances, and runout profiles.
Following any repair, the rotor must undergo low-speed balancing, and often high-speed balancing, to meet API standards. 4. Selecting a Repair Shop (API 687 Checklist)
Looking for obvious signs of erosion, scoring on journals, rubbing, or impact damage. The utility of RP 687 is increased when
API 687 outlines approved methods for repairing different types of rotor damage.
Comprehensive Guide to API 687 Rotor Repair: Standards, Procedures, and Sourcing Documentation