How to Weld a Heat Exchanger
Heat exchangers are used to transfer heat from one component to another. They are used in the automotive sector and in home heating and cooling. Since they are made of cast iron, they have the tendency to crack over an extended period of time. You may repair the crack using a MIG welder. MIG welders can be purchased or rented from tool stores. Does this Spark an idea?
Things You'll Need
- MIG welder
- Welding helmet
- Insulated gloves
- Oven or grill
- Wire brush
- Shop towels
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Instructions
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How to Weld a Heat Exchanger
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Prepare the damaged area of the heat exchanger by cleaning it with a wire brush to remove rust and paint. Wipe the area clean with a shop towel.
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Pre-heat the heat exchanger in an oven or grill. The temperature should reach 500 degress Fahrenheit before welding is performed.
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Attach the alligator clip of the ground cable to the heat exchanger or to a work bench. Turn on the MIG welder and set to the desired amperage.
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Put on a welding helmet and insulated gloves. Feed the wire through the welding contact tube until it sticks out 1/8-inch.
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Hold the contact tube at a 15-degree angle, perpendicular to the welding surface. Start a weld pool at the beginning of the weld. A weld pool is a puddle of melted metal that forms from the heat of the torch.
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Drag the weld pool along the length of the area being welded. Use small circular motions as you move down the welding area. Continue to feed wire through the contact tube as you weld, until complete.
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Allow the heat exchanger to cool naturally. Use the wire brush to remove any rough spots. Wipe clean with a shop towel.
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Tips & Warnings
Do not weld near flammable materials.
Always weld in a ventialted area.
References
Resources
- Photo Credit Ablestock.com/AbleStock.com/Getty Images
