Fluid tube is a hollow sections and weld steel pipe, from start to finish. Steel hollow section with a large number of pipe for transporting fluids transport oil, natural gas, gas, water and some solid materials, pipes, etc.. Steel pipe with round solid steel compared to the same torsional strength in bending, lighter, is an economic cross-section steel, widely used in the manufacture of structural parts and mechanical parts, such as drill pipe, automotive drive shafts, bicycle frame construction using steel scaffolding.