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How do I weld black pipe to a steel cylinder?
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I have an oxygen cylinder that I drilled 1 inch holes into. Then I rounded one end of a 1/2" x 3/4" black pipe 90° elbow to fit the 1 inch holes. Now I am left with the task of joining the two together in a solid fashion. I considered mig welding the two but was concerned with leaks. I also thought about brazing the two, but the area will be subjected to high heat. Somewhere in the order of 1100°, and I an concerned the braze will crack. Should I tack weld it to hold it firm , then braze it together to seal it???
What is the best way to join the two and seal it?? If it's welding then should I pre-heat the metals before welding?
By the way this is going to be the air inlet pipes on an Imbert Gasifier.