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When was the first practical oxyacetylene torch produced?

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Welder in a blue uniform and protective helmet using shielded metal arc welding to join metal pieces, with bright sparks and smoke visible at the welding point. — welding Shielded metal arc welding.

The first practical oxyacetylene torch was produced in 1901. This development utilized acetylene dissolved in acetone, which allowed for a stable and effective flame for metal fabrication.1

While Henry-Louis Le Chatelier had identified the high temperature potential of the oxyacetylene flame as early as 1895, it was the 1901 innovation that enabled the process to become a practical and established procedure for the fabrication of structural steel components.1