ansi b16 5 astm a182 f11 flange suppliers Brand Introduction Why Choose SSM Company Honor Contact Us Sino Special Metal (SSM) is a highly respected and reputable manufacturer, distributor, and stockist of a wide range of industrial products, including Pipes, Pipe Fittings, Flanges, Bolts, Round Bar, Steel Plate, Welding Wire, Steel Prefabrication, and more. With over 30 years of experience in...