Heat treatment and cooling
After bending, especially for heavy wall materials or special alloy steels, it may be necessary to restore the mechanical properties of the pipe using heat treatment. Such treatments include stress relieving, normalising, quenching & tempering and solution annealing heat treatment.
In order to perform these types of heat treatment, ENGIE Fabricom has 3 furnaces which can be heated up to 1,200°C and a large quench thank (13,3m L x 5m W x 5m D). When the quenching operation is performed, two pumps ensure sufficient circulation and agitation. The temperature of the quench tank is controlled by a dedicated cooling system which keeps the temperature at 20°C +/- 10°C.The temperature of the quench tank is monitored and registred by 3 thermocouples.
The furnaces are continuously monitored by thermo-couples situated in each zone, ensuring correct and balanced temperatures throughout the heat treatment cycle.
In order to meet the strict requirements with regard to material properties set by the Oil, Gas and Power industry, ENGIE Fabricom can offer various cooling types. Following heat treatment, bends can be immerged in water (quenching), cooled in still air or forced air, to obtain the right mechanical and corrosion characteristics.