Glass Lined Reactor Inspection and Maintenance Checklist

Routine Inspection and Maintenance Checklist for Glass-Lined Equipment

1. General Handling and Entry

• Use only manufacturer-designed lifting lugs for moving vessels; never use nozzles for lifting.
• Before entering a vessel, ensure all personnel:
• Wear new or dedicated rubber-soled shoes or sneakers.
• Remove all metal objects (belt buckles, studs, loose items) and empty pockets.
• Use only non-metallic tools (plastic or wood scrapers); avoid metal tools.
• Lower tools in a cloth or canvas bag.
  

2. Visual Inspection

• Inspect for signs of mechanical shock (cracks, star-shaped patterns, chipping, or loss of glass down to the steel substrate).
• Check for corrosion:
• Look for loss of fire polish, roughened or sandpaper-like surfaces, pinholes, or chipping.
• Pay special attention to areas exposed to acids, alkalis, and water vapor.
• Examine agitator blades, baffles, and nozzles for abrasion or wear.
• Inspect for thermal shock/stress damage (shattered or elephant skin appearance, especially near nozzles and jacket closure rings).
• Check for overstressing at nozzles (cracks, fractures, or exposed steel).
• Inspect all gaskets for integrity and signs of chemical attack or leakage.
• Examine agitator and baffle tips for signs of failure or corrosion.

3. Torque and Support Checks

• Verify all flange bolts and nozzle connections are torqued to manufacturer specifications.
• Re-torque gaskets after initial installation and periodically during service.
• Ensure expansion joints are installed close to nozzles and piping is properly supported.
• Confirm agitator drives are supported on vessel bosses or externally, not on nozzles.
  

4. Chemical and Process Controls

• Analyze all reactants for fluoride impurities before use.
• Monitor and control reagent concentrations and temperatures during operation.
• Feed caustic solutions directly into the liquid phase via dip pipes.
• Avoid abrupt temperature changes; follow manufacturer’s maximum safe temperature differentials.
• Insulate unjacketed areas and allow for free expansion during heating/cooling.
  

5. Maintenance of Repairs and Accessories

• Inspect all tantalum or metal repair plugs, patches, and sleeves for secure installation and absence of leaks.
• Use only manufacturer-approved cements for repairs.
• Replace or repair damaged gaskets, baffles, and agitator blades as needed.
  

6. Flaw Detection and Monitoring

• Use early flaw detection systems (e.g., GlasSentinel® and GlasGuard®) to identify flaws exposing the steel substrate.
• Regularly test and calibrate detection systems and alarms.
  

7. Miscellaneous Preventive Measures

• Check jacket injection nozzles and impingement plates for integrity and correct installation.
• Ensure vessel supports are even and follow the manufacturer’s installation procedures.
• If stored outdoors, cover baffle ends to prevent water ingress and freezing.
• Avoid using glass-lined vessels for untested reactions or materials without prior corrosion testing.

Example Implementation:

• Integrate this checklist into your facility’s standard operating procedures (SOPs).
• Schedule inspections at regular intervals (e.g., monthly, quarterly) and after any suspected incident (mechanical shock, thermal event, chemical spill).
• Document all findings and corrective actions for traceability and continuous improvement.

This checklist is only an outline providing a comprehensive, actionable framework for maintaining the safety and longevity of glass-lined process equipment, directly addressing the most significant risks. Glass-lined steel reactors are very robust and will provide decades of reliable service if maintained and operated properly. If you would like to discuss this further and more comprehensively, please contact us.