A pipe is a hollow tube with a round cross-section used for the conveyance of various products. These products include fluids, gases, pellets, powders, and more. The term "pipe" is used in preference to "tube" to refer specifically to tubular products with dimensions commonly used in pipeline and piping systems. Pipes that conform to the dimensional requirements of ASME B36.10 (Welded and Seamless Wrought Steel Pipe) and ASME B36.19 (Stainless Steel Pipe).