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Traditional methods of bolt heating and torquing to remove nuts during
routine maintenance procedures can be time consuming, costly, and a safety
hazard. A typical closure procedure for inner and outer cylinders using
this method can take up to 60 man-hours to complete.
A Safe and Efficient Alternative
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The Hydraulic Turbine Casing Closure System from Xtreme Bolting Services and TTI is a safe and cost-effective solution. This system eliminates
the need for bolt heating and torquing between initial breakout and
final closure by pressurizing selected studs simultaneously, quickly
generating loads sufficient to simulate operating conditions. Initial
installation and final removal of the system can be completed in 2-4
hours. |
Custom & Flexible Design
Specially designed locking collar Hydraulic Nuts are utilized to maintain
loads on the inner shell while the outer shell is installed for alignment
checks or other maintenance procedures. Since each Hydraulic Nut is configured
to stud size and threads per inch, the system components can be cross
utilized on the inner and outer shells of the HP, IP, and LP as well as
control valves and other bolted flanges. The hydraulic Turbine casing
Closure System can also be utilized to speed up final closure on the turbine
shells
Each Hydraulic turbine Casing Closure System is configured to your particular
outage requirements. The system is designed to accommodate virtually every
manufacturer turbine model. It can also be configured to simultaneously
pressurize the HP, IP, and LP sections, if required for speed. The Hydraulic
Turbine Casing Closure System is available in a range of sizes, from 2
to 6 inch nuts.
Easy Operation
The operation of the Hydraulic Turbine Casing Closure System is simple.
The operator first hand tightens the Hydraulic Nut on the stud. He then
connects the hoses, which have quick-disconnect fittings, from the pump
to the Hydraulic Nut. After running the pump to achieve a predetermined
pressure, he tightens the Locking Collar and releases the pressure. The
Locking Collar retains the load in the stud.
The Hydraulic Turbine Casing Closure System is specially designed for
use when checking turbine internal clearances. These compact Hydraulic
Nuts temporarily replace existing nuts on the inner and outer casings
during the tops-on, tops-off process. When pressurized, they provide the
clamping force to overcome casing distortion.
System Benefits
• It is Portable, Safe, and Easy to Use
• Tremendous Time Savings
• Reduced Man-Hours
• Shortens Critical Path Schedule
• Eliminates Dangerous CAL-ROD’s and Gas Heating
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Turbine Casing Closure