To pump 20 # carbon steel pipe for ordinary, by the fluid tube or pipe straight seam, and processing. To pump tube is a hollow section, no seams around the long bar of steel. To pump tube with a hollow cross section, a large number of pipes used for transporting fluids, such as transportation of oil, natural gas, the product detail tubing for ordinary 20 # carbon steel, the fluid pipe or straight seam pipe processing. To pump tube is a hollow section, no seams around the long bar of steel. To pump tube with a hollow cross section, a large number of pipes used for transporting fluids, such as transportation of oil, gas, gas, water and some solid materials, pump tube. Etc. tubing and solid steel bar compared to the same torsional strength in bending, lighter, is an economic cross-section tube, widely used in the manufacture of structural parts and mechanical parts. Land pump pipe manufacturing ring parts, can improve material utilization, simplify the manufacturing process, saving materials and processing time, the land has been widely used to manufacture tubing. Pipe fittings according to different cross-section shape can be divided into the pump tube and shaped tubes. Because in the perimeter of equal conditions, the largest area of ??a circle with a pump tube can carry more fluid. In addition, the circular cross section to withstand internal or external radial pressure, the force is uniform, so the vast majority are tubing fittings. However, the pump tube also has some limitations, such as under the conditions by plane bending, the tubing is not as good as square, rectangular pipe large flexural strength, some farm machinery skeleton, steel and wood furniture on the common square and rectangular tube. Pipe having the fluid to be pumped and to be chemically compatible, in order to have a good pumping properties and safety performance.