http://www.ssmmetals.com/ China ansi b16 5 astm a182 f91 flange factory 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 special metal product development, manufacturing, and marketing, SSM has established itself as a leading provider of integrated piping solutions to a diverse range of industries worldwide. We are capable of produci