The difference between Hebei and Meng flange welding flange

　　Flange and butt welding flange are backing ring with two ring lining. When the equipment is made of stainless steel, carbon steel flange 7 stainless steel lining ring, you can save the stainless steel. Flange standard to determine the size of the flange, you must know the nominal diameter of the flange and the nominal pressure. The nominal diameter of the flange of the pressure vessel is the same as the nominal diameter of the pressure vessel. For example, DN 1000mm of the pressure vessel, pressure vessel flange shall be equipped with DN 1000mm. Due to the different specific dimensions represented by the nominal diameter of the cylinder nominal diameter and pipe, so the same nominal diameter of the vessel flange and pipe flange, their size is not the same, not each other alternative.