Astec Tubes has long been a trusted supplier and manufacturer of Duplex 31803 Flanges. We've been in this business for a long time, providing high-quality goods to our customers. These 31803 Flanges are ferrite – austenitic steel grades that are very common. Many industries use these flanges for a variety of industrial applications all over the world. This is a fantastic and financially viable product, which is why it is so successful. It's a formidable commodity born of powerful power and instrumentation applications. These flanges are extremely hard and have a secure grip on the fitting. Also in the presence of acidic liquids, these are recognized for their excellent corrosion resistance.