Coal, Gas

Induction Bolt Heating System

Issue 1 and Volume 102.

Induction Bolt Heating System

The Porta-Safe® Induction Bolt Heating System is a cart-mounted portable induction power supply designed to inductively generate rapid heating of turbine bolts for field assembly and disassembly of the steam turbine horizontal joint. Power is generated and transmitted to the stud hole, via long leads connected to a small diameter induction coil that is inserted into the bolt. Thermal elongation in bolts up to 6-inches in diameter occurs in minutes, enabling workers to loosen large fasteners quickly, thereby reducing the overall time necessary for completion of critical path outages.

JNT Technical Services

Circle 188