The forging of flat welded flange can be divided into free forging, frog forging, extrusion, die section, closed die section and closed impact forging. The forging technology of flat welding flange can be divided into free forging, rough forging, extrusion, die forging, closed die forging and close

The control of stainless steel flanges should start with material reduction or hydrogen damage from the selection of materials, control technology and optimal environment, and the first choice of alloys with strong resistance to interference. The pure and high-quality steel without impurities and un