When I forge pipe, I normally stuff a rag in the end to stop the chimney effect. But when the piece is short, I'll sometimes weld on a piece of bar as a handle. The first time I did that, I let my hand get below the pipe, and all the scale that had been collecting inside poured out at once. Now I flare the end of the bar and bend it 90 degrees, so it covers the end of the pipe when I weld it on.
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