Casting pipes are an industrial material used in the production of metal products. They are typically used for metal molding and foundries. Casting pipes are used to hold molten metal that is being cast into a mold. The molten metal is poured into a pipe which is then filled with air. As the metal cools, it is drawn up through the pipe and into the mold. The pipe is then removed and the cast metal is ejected from the end of the pipe.