Api+687+rotor+repair+pdf+download+better [new] -

To prevent the shaft from "remembering" the stress of the weld and warping later, they applied dual stress relief—a rigorous step mandated by the standard to ensure long-term integrity.

Required if Phase I findings suggest deeper damage, such as internal cracks, migrated impellers, or heavy rubs. This involves a "stack" or "unstack" process to inspect individual subcomponents. Critical Repair Guidelines api+687+rotor+repair+pdf+download+better

Rotor returned to service with vibration levels under 0.2 mils. The compressor ran for 54 months uninterrupted. Saved downtime ($2.1M), avoided a second catastrophic failure ($1.1M rotor replacement). Total savings: $3.2 million. To prevent the shaft from "remembering" the stress

: The standard outlines two primary methods: Critical Repair Guidelines Rotor returned to service with

Annex G covers various methods to add material, including plating, metalizing, thermal spray coating, plasma spray, and welding .

: Once repaired, the rotor undergoes meticulous balancing. API 687 highlights two paths: Component Balancing (balancing each part individually) or Assembly Balancing (balancing in stages as parts are added). Critical Warning: Prohibited Repairs