Precision Seamless Features and Usage

The quality of the perforated capillary has a very important effect on the quality of the hot rolled seamless steel tube because of the surface defects or eccentricity (uneven thickness) of the worn capillary. The way pressure pipe punching punching, pushing rotary perforation and perforation. Thick wall seamless steel is mainly used in oil geological drilling pipe, and petrochemical used in cracking pipe, boiler tube, pipe and automobile bearing, tractor, aviation and other precision pipe structures, its manufacturing process: hot rolled seamless steel pipe circle, heating, three porous roller, rolling or extrusion, separation, slurry (or reduced) cooling, straightening,?? water pressure Test (or test) marks - storage.


Hot rolled seamless steel ingots can destroy the microstructure, refine the steel grains and eliminate the microstructure of defects, thus improving the mechanical properties of the dense structure of the steel. This improvement is mainly reflected in the direction of the rolling direction, and to a certain extent the steel is no longer isotropic, and the bubbles, cracks and looseness formed by pouring can be welded at high temperature and high pressure.


After hot rolling, seamless steel tubes are perforated by pressure piercing after roasting. Generally, the common punch is a tapered roller punch, which has high production efficiency, good product quality, strong perforation and expansion ability, and can wear all kinds of steel. After piercing, the tube passes through three rolls of rolling, rolling or extruding. Squeeze the pipe after sizing. A high speed rotary drill with a perforated steel embryo. The inner diameter of the pipe is determined by the length of the drill bit in the outer diameter sizing machine.


After cooling, it is necessary to straighten the pipeline through the spray cooling tube after cooling it into the cooling tower. The steel belt conveyor is straightened to the metal testing machine (or pressure test) for internal testing. If internal piping cracks, bubbles and other problems will be detected. After selecting steel, we must pass the strict quality control manual. After the steel quality, the quantity, size, batch number and so on. The crane enters the warehouse.