Localised Heat Treatment

This is a process that is used on site to stress relieve completed welds joints. The process uses special electric blankets, which are wrapped, around the weld joint area. Then by means of a special programmer/recorder and transformer, the settings are imputed and the heating cycle then runs its desired course. This usually consists of quickly climbing to a starting temperature then climbing gradually at a set rate/time to a soaking temperature, which is then held for a required period of time. This soaking period is where the material has all the internal welding stresses relieved from the material. Once the soaking period is completed during the cycle, the temperature then drops gradually at a set rate/time to allow slow cooling. This equipment can also be used to hold Pre-Heating temperatures during weld on large and thick weld joints.