Small Diameter Seamless Steel Tube

　　The steel pipe industry has developed rapidly in recent years, and its types are also emerging. Today, we will introduce the characteristics and uses of small-diameter seamless steel tubes.

　　The small-diameter seamless steel pipe is a circular, square and rectangular steel seamless steel pipe with a hollow section and no seam at the periphery. The steel pipe is perforated with a steel ingot or a solid pipe blank, and then hot-rolled, cold-rolled or cold-drawn production process. The seamless steel pipe has a hollow section and is used as a pipe for conveying fluid. Compared with a solid steel such as round steel, the steel pipe is light in weight when it has the same bending and torsional strength, and is an economical section steel, which is widely used in manufacturing structures, parts and mechanical parts, such as oil drill pipes, automotive drive shafts, bicycle frames, and steel scaffolding used in construction.

　　According to the different production methods, it can be divided into hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, extruded tubes, etc. Hot-rolled seamless tubes are generally produced on automatic rolling mill units.

　　The solid tube blank is inspected and the surface defects are cut to the required length, centered on the end face of the perforated end of the tube blank and then sent to the furnace for heating. The perforation is perforated at the perforator while continuously rotating and advancing, under the action of the roll and the head. The cavity is gradually formed into a hollow tube inside the tube blank, and then sent to the automatic tube rolling machine to continue rolling. The final machine is evenly wall-thickened, sizing according to the sizing (reducing diameter) machine, meeting the specification requirements, and producing by the continuous rolling tube unit. Hot-rolled seamless steel tubes are a more advanced method. If you want to obtain seamless tubes with smaller size and better quality, you must use cold rolling cold drawing or a combination of the two. Cold rolling is usually carried out on a two-roll mill.

　　The steel pipe is rolled in an annular hole type composed of a variable-section circular hole groove and a fixed conical head. The cold-drawn drawing is usually performed on a single-chain or double-chain cold drawing machine by pressing the tube blank to be heated. The perforated rod in the closed extrusion cylinder moves together with the extrusion rod to extrude the extrusion from the smaller orifice, which produces a smaller diameter steel tube. If you want to know more about other types of steel pipes, please pay attention to our website info and news.

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