Challenge: Boiler manways must withstand extreme thermal expansion, pressure cycling, and vibration. Traditional bolting methods often result in uneven preload, leading to gasket failure, steam leakage, and extended maintenance downtime.

Solution: Nord-Lock Group engineers can assess particular application specifications and determine the most appropriate solution. Superbolt multi-jackbolt tensioners enable uniform preload across all manway bolts, ensuring tight sealing and reducing the risk of thermal fatigue. On the other hand, Boltight hydraulic tensioners allow for fast, simultaneous tensioning of multiple bolts, minimizing time spent in high-temperature zones and improving safety during maintenance.

Both technologies eliminate the need for large torque wrenches and reduce the risk of over- or under-tightening – common issues in confined engine room environments.

For defense engineers and program managers, integrating advanced bolting solutions into boiler systems means:

• Fewer unplanned outages
• Lower lifecycle maintenance costs
• Improved crew safety and operational readiness
  
  

For reliability professionals, these technologies offer:

• Predictable performance under thermal cycling
• Simplified inspection and maintenance
• Compatibility with existing vessel designs