The OSK4TK weld head is a combination of the OSK65W enclosed water cooled weld head and the 4TK kit; comprising electrode holder, nose ring and pneumatic mandrel actuating assembly.
This method of producing autogenous tube to tubesheet joints provides a high quality, very clean weld and is particularly suited to Titanium applications because the entire weld circumference is contained within a fully inert environment during welding.
This head can be used for tube diameters from 15.0mm to 50.0mm ID, a mandrel assembly is required to complete the package.
1.50" OD Stainless Steel tubes welded into a Stainless Steel Tubesheet using the OSK4TK weld head. This photo shows the welds in the 'as welded' condition, no additional cleaning or brushing has been carried out post welding:
Welding with the OSK4TK weld head is a fitting operation rather than a welding op, a simple pneumatic switch is used to de-activate/activate the mandrel for rapid relocation between welds:
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