精轧钢管就是精轧无缝钢管，冷拔无缝钢管的主要生产流程 管坯及坯加热、管坯的穿孔、钢管的延伸、精轧钢管的轧制、钢管定径与减径、钢管的冷却和精整 或者可以说是钢胚的加热、穿孔、热扎、酸洗、冷拔、碳烧、切头、喷标、包装、成品冷拉钢管是在常温条件下，以超过原来钢筋屈服点强度的拉应力，强行拉伸钢筋，使钢筋产生塑性变形以达到提高钢筋屈服点强度和节约钢材为目的。
Fine-rolled steel pipe is the finely-rolled seamless steel pipe. The main production process of seamless steel pipe is heating billet and billet, perforation of billet, extension of steel pipe, rolling of steel pipe, sizing and reducing of steel pipe, cooling and finishing of steel pipe or heating of steel embryo, piercing, hot binding, pickling, cold drawing, carbon burning, cutting head, spraying mark, package. Cold-drawn steel pipes are loaded and finished at room temperature, in order to increase the yield point strength of steel bars and save steel, the tensile stress exceeding the original yield point strength of steel bars is forced to stretch steel bars so as to produce plastic deformation of steel bars. 精轧钢管的概念：以节约钢材、提高钢筋屈服强度为目的，以超过屈服强度而又小于极限强度的拉应力拉伸钢筋，使其产生塑性变形的做法叫钢筋冷拉。产品广泛应用于：机械设备：木工机械、陶瓷机械、造纸机械、玻璃机械、食品机械、建筑机械、塑料机械、纺织机械、千斤顶、液压机等。
The concept of finish rolling steel pipe: for the purpose of saving steel and improving the yield strength of steel bars, the method of cold drawing of steel bars is to produce plastic deformation by stretching steel bars under tension stress which exceed the yield strength and are less than the ultimate strength. Products are widely used in: machinery and equipment: woodworking machinery, ceramic machinery, paper machinery, glass machinery, food machinery, construction machinery, plastic machinery, textile machinery, jacks, hydraulic presses and so on.
磁力机械油封的工作原理：磁力机械油封由静环和动环两部分组成，静环材料为高强度磁性不锈钢合金，安装于密封座内;动环安装于转动轴上，其上镶嵌有磁性材料，并环嵌由碳和石墨制作的耐磨且润滑良好的密封材料。当精轧钢管的磁力油封动静环安装完毕贴合后，无论转轴转动与否，动环上磁性材料的磁力始终保证动静环之间是紧密贴合的，从而达到密封效果。磁力油封的这种工作原理，使其真正实现了高、低转速和静止时的零泄露。此外，这种油封还有使用寿命长，结构简单，维护工作量小等优点。
The working principle of the magnetic mechanical oil seal: the magnetic mechanical oil seal consists of a static ring and a moving ring. The material of the static ring is a high strength magnetic stainless steel alloy, which is installed in the seal seat. The moving ring is installed on the rotating shaft, which is inlaid with magnetic material, and the ring is inlaid with wear-resistant and lubricating sealing material made of carbon and graphite. When the magnetic oil seal dynamic and static rings of the finishing rolling steel pipe are installed and fitted, the magnetic force of the magnetic material on the dynamic rings always ensures that the dynamic and static rings are closely fitted, regardless of whether the rotating shaft rotates or not, so as to achieve the sealing effect. The working principle of magnetic oil seal makes it realize zero leakage at high, low speed and static state. In addition, the oil seal has the advantages of long service life, simple structure and small maintenance workload.
