316 stainless steel is generally a general term for stainless steel and acid-resistant steel. Stainless steel refers to steel that is resistant to corrosion by weak media such as atmosphere, steam and water, while acid-resistant steel refers to steel that is resistant to corrosion by chemically corrosive media such as acid, alkali and salt. 316 is an alloy of stainless iron and nickel. Composition ratio: 16% nickel, 84% stainless iron. 316 stainless steel is the second widely used steel type after 304. It is mainly used in the food industry and surgical equipment. The addition of molybdenum can give it a special corrosion-resistant structure. The addition of Mo element to 316 stainless steel greatly improves its corrosion resistance and high-temperature strength. The high temperature resistance can reach 1200-1300 degrees, and it can be used under harsh conditions.In the piping system, elbows are pipe fittings that change the direction of the pipeline. According to the angle, there are three most commonly used elbows: 45°, 90°, and 180°. In addition, according to the needs of the project, there are other non-normal angle elbows such as 60°. The materials of elbows include cast iron, stainless steel, alloy steel, forgeable cast iron, carbon steel, non-ferrous metals and plastics.The ways to connect with the pipe are: direct welding (the most common way) flange connection, hot melt connection, electric fusion connection, threaded connection and socket connection. According to the production process, it can be divided into: welded elbow, stamped elbow, push elbow, cast elbow, butt welding elbow, etc. Other names: 90 degree elbow, right angle elbow, etc.