The small-diameter seamless pipe is a small-diameter seamless pipe for mechanical structures, high dimensional accuracy of hydraulic equipment, and good surface finish. Small-diameter seamless pipes use precision seamless pipes to make mechanical structures or hydraulic equipment, which can greatly save machining man-hours, increase material utilization, and help improve product quality. Small-diameter seamless pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, and extruded pipes according to different production methods. Hot-rolled seamless pipes are generally produced on automatic pipe mills, and solid billets are inspected and removed. The surface defect is cut to the desired length, centered on the perforated end face of the tube blank and then sent to a heating furnace for heating. The perforation in the perforator is continuously rotating and advancing while perforating. Under the action of the roller and the plug, a cavity is gradually formed inside the tube blank. Call the capillary tube, send it to the automatic tube mill, continue rolling, and finally pass through the entire thickness of the homogenizer. After sizing by the calibrating machine to meet the specifications, it is an advanced method to produce hot-rolled seamless steel tubes with continuous rolling tube units. If you want to obtain a seamless tube with smaller size and better quality, you must use cold rolling or cold drawing or a combination of both. Cold rolling is usually carried out on a two-high mill. Small-diameter seamless tubes are used in variable-section circular grooves and Rolling in the annular hole type consisting of a fixed conical head, cold drawing is usually performed on a single-chain or double-chain type cold drawing machine. The extrusion method is to place the heated tube blank in a closed extrusion cylinder. Perforated rod moves with squeeze rod The pressing member is extruded from a small die orifice, this method can produce small diameter steel pipe. Small-diameter seamless pipe weight calculation formula: [(outer diameter - wall thickness) * wall thickness] * 0.02466 = kg/meter (weight per meter)
