Api 687 Rotor Repair Pdf Download-------- ((top))

| Component | Allowed Repairs | Prohibited / Limited Actions | |-----------|----------------|------------------------------| | | Refurbishment of leading/trailing edges (within limits), replacement of damaged blades with OEM-equivalent parts | Welding on high-stress areas without engineering approval | | Shafts | Chrome plating of journals, grinding to remove minor scoring, straightening (limited to 0.001" TIR per foot) | Build-up welding on journal surfaces unless re-engineered | | Disks/Wheels | Bore polishing, removal of minor cracks (depth < 0.010"), replacement of sideplates | Welding on disk rims or bores without FEA validation | | Seal Surfaces | Spray & fuse coatings (e.g., Colmonoy), HVOF tungsten carbide, chrome plating | Electrolytic iron plating for high-speed (>400 ft/s) seals |

API RP 687 mandates specific NDT methods, each with stringent acceptance criteria:

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Used on ferromagnetic shafts and impellers to reveal surface and near-surface cracks. Api 687 Rotor Repair Pdf Download--------

Balancing is critical to prevent destructive vibrations at operating speeds. API 687 mandates a two-tier balancing approach:

High vibration at operating speeds, leading to bearing destruction.

The primary goal of API 687 is to return components to their latest design fits and clearances, ensuring: | Component | Allowed Repairs | Prohibited /

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

Examining standard defined within API guidelines.

Measuring shaft straightness, journal roundness, and thrust collar parallelism using precision dial indicators or automated coordinate measuring machines (CMM). Phase 2: Non-Destructive Testing (NDT) This essay explores the significance of API 687,

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The most recent version is the , which includes recent updates and errata.

This approach allows the repair to: