Advanced Maintenance Procedure
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Preliminary Inspection & Planning
- Performance Evaluation: Review of historical usage data, failure records, and performance analysis of the valve system
- Risk Assessment: Maintenance priorities are determined based on current equipment condition, and a maintenance plan is prepared
Safe Disassembly & Preparation
- Disassembly: Careful separation of the valve and related accessories (e.g., connectors, seals, support components)
- Tagging & Documentation: Each part is labeled and referenced to preserve its original assembly position
- Initial Cleaning: Removal of coarse dirt, rust, and oxidation from components
Surface Preparation & Cleaning
- Deep Cleaning: Use of chemical solvents or specialized cleaners to remove contaminants, grease, and oxidation
- Sandblasting / Shot Blasting: Surface roughening to eliminate oxidation and residues; anti-corrosion treatments applied if needed
Non-Destructive Testing (NDT) & Measurements
- Visual & NDT Inspection: Critical pressure-bearing components are inspected using ultrasonic, penetrant, or X-ray methods
- Dimensional Measurements: Verification of dimensions and technical parameters against ASME, NACE, or API standards; results documented
- Leak & Tightness Testing: Pressure tests and leak checks performed on the valve and connection elements
Refurbishment, Repair & Part Replacement
- Component Replacement: Worn seals, insulation, lubricants, and other critical parts are replaced per original specifications
- Repair Operations: Damaged metal surfaces, weld corrections, or mechanical deformations are repaired
- Special Welding Applications: Structural integrity ensured through welding, followed by NDT quality control
Surface Treatment & Protective Applications
- Grinding & Polishing: Applied for surface smoothness and aesthetic finish
- Coating & Painting: Protective coatings or paints enhance resistance to corrosion and environmental exposure
Reassembly & Final Adjustments
- Reassembly: All components are carefully reinstalled in their original positions
- Connection & Torqueing: All fasteners are tightened to correct torque specifications
- Final Calibration: Valve parameters are calibrated and adjusted according to manufacturer specifications
Final Testing, Inspection & Reporting
- Performance Testing: Hydrostatic and dynamic tests confirm safe and error-free operation
- Inspection & Damage Assessment: Final system-wide inspection conducted; all results are thoroughly documented
- Labeling & Packaging: After completion, the product is re-labeled, packaged, and prepared for shipment
