SA350 LF2 flanges are mostly used to connect pipes, valves and pumps. It has several grades and classes. These are corrosion resistance and are used in many other industrial sectors. They are made to specified dimensions, or to dimensional standards, such as the ASME and API specifications. The material composition includes carbon, silicon, manganese, phosphorus, sulfur, molybdenum, copper, chromium, nickel, vanadium and niobium.