What does it mean to back purge a weld and why does it matter to me?

Ensuring proper penetration and proper welding is crucial to ensure the longevity of exhaust components that are welded together. Purging the metal of oxygen with an inert shielding gas can keep the weld fully protected from oxidation that could lead to corrosion. The formation of oxides usually results in black “sugaring” on the back side of the weld. We seal any openings on the component we are welding and introduce a pinhole on one side to allow air to flow out and Argon to flow in from a cap on the other side. This process, combined with skilled fabricators results in the most durable welds on your product, minimizing any chance of exhaust cracks or failures.