Home Page Products Exothermic Welding System Preparation

Preparation

1. Cable must be bright, clean and dry.
2. Cable that is saturated with oil or grease must be cleaned. Cable may be cleaned by burning it off with a torch (gasoline blow torch, gaseous torch, acetylene torch).

After burning off oil or grease, a wire brush should be used to remove residue. Wet cable must be dried out. Use a hand torch.
3. Corroded cable must be cleaned. Use the cable cleaning brush or a card cloth brush. (Being clean for the ends of the individual strands is important) This can be best accomplished by making a fresh out on the end of the cable.
4. Bent or out of round cable will hold mould open and cause leaks. Cable should be straightened before clamping mould in place.
5. Remove insulation from insulated cable before cutting with hack saw. Otherwise ends of strands will become coated with insulating material which may cause defective welds.

1. Surface to be welded must be bright clean and dry.
2. Remove rust and mill scale with rasp, coarse file or grinder.
3. Remove oil, grease or pitch coatings with a solvent or torch.
4. Galvanized surfaces may be cleaned with emery cloth to remove oxide film. Use galvanizing bar to re-galvanized around weld.
5. Cast iron surfaces must be free from large pits and flaws. For cast iron less than 1/2” thick, do not use larger than a #65 cartridge.

1. End and adjacent length of rod or receptacle stud must be clean and dry to insure a good weld. Use brush to remove surface oxides. Use file to remove rust and mill scale.
2. End of rod that has been mushroomed by driving must be cut off. A driving sleeve is recommended to prevent mushrooming.