Turbine half Joints

Leak Sealing Methods:

A variety of leak sealing methods may be applied, sometimes in combination with one another

• Injection points may be drilled into each bolt hole in the vicinity of the leak
• A low viscosity compound (easy flowing) can then be injected down the bolt holes at pressure
• The compound will flow into any narrow gaps at the half joint, which may be sufficient to seal the leak path
• Injection points may be drilled at an angle, to intersect the half joint between the bolt holes
• Again, a low viscosity compound is injected at pressure with the intention that it flows out of the injection hole at the half joint to fill the leak paths
• A plate may be fastened across the half joint in the region of the leak
• The plate may be attached to the turbine by welding, or by drilling and tapping for an array of studs
• The plate will have a recess into which compound is injected, with the intention that it flows into any gaps at the half joint