How to ensure the flatness of steel flanges surface

　　A lot of steel flanges, after the production and processing, the surface of the flange is particularly uneven. As the flange of the manufacturers, how can we guarantee the smooth surface of the flange.

　　First we need to use artificial lathe into the top flange, when placed in the so-called lathe above, we must put it flat, after the so-called flat surface, normal flange are reasonable processing, reasonable processing that we use the speed of rotation of the lathe to slow down, we have to look at whether the welding flange in the lathe with the level of rotation, when we determine the good flange after turning lathes above the level, we see in the above tool lathe is fast, if not faster, so we use the surface form rationality for machining flange, grinding after we finished, we processed flange flange surface on the surface for slow speed, this usually appeared in the flange surface flatness, does not exist the phenomenon of surface scales.