One of INTEC-HEAT’s most important lines of work is the preheating of welds, which is subject to increasingly strict standards. Therefore, the experience of INTEC-HEAT provides great added value to our work.
The main reason for doing this work is to avoid potential cracking in the weld area. Preheating minimises and eliminates factors that lead to cracking by:
– Preventing the formation of cracks by reducing tension
– Compensating for high temperature gradients
– Reducing hardening in the weld area
– Reducing porosity in the weld area
– Improving the micro-structure of the area affected by the heat
Our latest-generation programmers allow us to remotely control all hot points, which also allows the client to supervise the process in a single glance.
ELECTRIC, THROUGH RESISTANCE
The temperatures required during the process are reached through the direct application of electrical resistance at a suitable distance from the weld.
The flexibility of these elements makes them ideal for all kinds of shapes.
The high frequency cables wrapped around the element to be welded excites the molecules and raises the temperature.
We use the most advanced equipment and water-cooled cables for greater safety during the process.
ELECTRIC, THROUGH RESISTANCES
The use of radiation employing specific resistances and its placement using suitable supports allows preheating with shells rotating without any contact occurring. Temperature control is carried out by infrared sensors.
The rolling inductor allows preheating of moving parts. By sensing the movement of the piece we can carry out automatic disconnections that avoid overheating in the case of unexpected stops of the welding.