16mn thick wall seamless steel pipe factory

The general production process of 16mn thick-walled seamless steel pipe can be divided into two kinds of cold-drawn and hot-rolled, cold-rolled 16mn thick-walled seamless steel pipe production process is generally more complicated than hot-rolled, the pipe billet is first subjected to three-roll continuous rolling, after extrusion to be sizing test, if the surface does not respond to the crack after the round tube to be cut through the cutting machine, cut into lengths of about a meter of billet. Then enter the annealing process, annealing to acidic liquid for pickling, pickling to note whether the surface has a large number of blistering generated, if there is a large number of blistering generated indicates that the quality of steel pipe does not meet the corresponding standards. The appearance of cold rolled 16mn thick wall seamless steel tube is shorter than hot rolled 16mn thick wall seamless steel tube, cold rolled 16mn thick wall seamless steel tube wall thickness is generally smaller than hot rolled 16mn thick wall seamless steel tube, but the surface looks brighter than thick wall 16mn thick wall seamless steel tube, the surface does not have much roughness, and the caliber does not have much burr. The delivery condition of the hot rolled 16mn thick wall seamless steel pipe is generally hot rolled state after heat treatment for delivery. The hot rolled 16mn thick wall seamless steel tube is subjected to strict hand selection by the staff after quality inspection, surface oiling after quality inspection, then followed by several cold drawing experiments, hot rolling treatment followed by perforation experiments, and if the perforation expansion is too large to be straightened. After straightening, it is then transferred by a conveyor to a flaw detection machine for flaw detection experiments, labeled and arranged in specifications and placed in the warehouse.

16mn thick wall seamless steel pipe factory

　　Hot-rolled seamless pipes are generally produced on active pipe rolling units. Solid billets are viewed and surface flaws are eliminated, cut to the required length, centered on the perforated end of the billet, then sent to a heating furnace for heating and perforated on a perforating machine. In the perforation while constantly rotating and advancing, in the roll and the effect of the top, the internal cavity of the billet gradually formed, called the hair pipe. Then sent to the active rolling mill to continue rolling. The wall thickness is evenly adjusted by the equalizing machine, and the diameter is fixed by the sizing machine to meet the standard requirements. The use of continuous rolling unit production of hot-rolled 16mn thick-walled seamless steel pipe is the more **** approach.

　　Hot-rolled pipe outer diameter 32 ~ 630mm. wall thickness 2.5 ~ 75mm. cold-rolled (cold-drawn) pipe outer diameter 5 ~ 200mm. wall thickness 2.5 ~ 12mm.

　　Appearance quality: the surface of the steel pipe shall not have cracks, folding, rolling folding, leaving the layer, hairline and scarring defects exist. These defects should be eradicated, after eradication shall not make the wall thickness and outside diameter exceed the negative error.

　　The ends of the steel pipe should be cut at right angles, and eradicate burrs. Wall thickness greater than 20mm of steel pipe promised gas cutting and hot sawing cut. By mutual agreement between supply and demand may also not cut the head.