... Types of Casting or Forging Flanges Material:stainless steel, alloy steel, cast steel, pressure:0.1,0.25,0.6,1 ... , SW. etc.2.Material: Ductile iron, carbon steel, stainless steel or other alloy steel according to ASTM, DIN,JIS, EN, ISO, ... treatment5.Surface finish: Painting, powder coating, plating, bluingor other methods based on customers' requirements6.Certificate: ISO90017.Engineering service: ...