Product name: Screw rings OEM pipe fittings Material: Ductile iron casting GGG40, GGG40.3 GGG50, GGG60, GGG70, ASTM 60-40-18, 65-45-12, 70-50-05, 80-55-06, 100-70-03, FCD400-15, FCD500-7, FCD600-3 Production process: Sand casting, annealing, precision machining, shell molding casting, resin sand casting, sand blasting, Welding Production facility: Automatic molding line, Disa vertical molding line, Japan Tokyo horizontal molding line, resin sand molding line, No bake sand molding, shell molding line Maximum flask size: 2000mm x 2000mm x 1000mm Available service: OEM, Design optimization, precision machining, heat treatment, cnc machining, milling, drilling. Painting, powder coating, electroless nickel plating. Zinc Plating, E-coating. HDG, hot galvanizing Unit Weight: 0.1kg-1000kg, 0.2lbs-2000lbs Size: According to drawing Customizable or not: Yes Packing: Carton, plywood cases, pallets Certificate: ISO9001:2008 Inspection report: Dimension report. Material report including chemical contents, tensile strength, yield strength and hardness. X-ray test report, Ultrasonic test report and Magnetic particle test available upon request. Origin: China