Local heat treatment of the closing weld

The weld was heated from both sides of the apparatus wall (outside and inside) using flexible surface heaters in the high tempering mode. Two heating belts 350-450mm wide were formed from the heaters on each side of the apparatus wall. During the work, 96 heaters were installed on the outside of the machine and 80 heaters were installed on the inside.
 
The heaters were attached to the apparatus using insulating studs and a condenser device, and were additionally secured to the outside of the apparatus using a steel band. During operation, the heating process was monitored using four RT150-12 heat treatment units.