Tank Track Heater
The Tank Track Preheater has the same design concept as the ceramic bead CPP in terms of their in sulation backing and stainless steel protection. The ceramic pad element is,however,replaced by full width beads,75mm wide.The heater has an over all width of 101mm. The construction of the element is simple with a facility to accommodate six longitudinal runs of the heater core wire.The standard heater is rated for 60V or 80V operation using a heat treatment transformer as the power source.
Localised heat treatment is often required after welding on circumferential welds or with the fitting or repair welding of nozzles/attachments to the shell.It is sometimes an advantage to undertake the heat treatment by the application of ceramic pad heaters to the external surface of the shell.This is particularly so where internal access is restricted or where there is a necessity for internal welding and the preheat and PWHT arrangements can be common.The use of larger pads can be useful under such circumstances,but special attentio nmust be given to safety precautions and also to the freedom of the metal surface from contaminants.
HEATMENT 