This 90-degree elbow is a class 3000 forged stainless steel 316/316L pipe fitting with female National Pipe Taper (NPT) threads for connecting pipes and fittings. This 90-degree elbow changes the flow direction in pipes and has NPT threading for creating a tighter seal than straight threads. The forged class 3000 pipe fitting can be used in high pressure applications and is made from stainless steel 316/316L for corrosion resistance. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure. This fitting meets standards ASTM A182, ASME SA182, and ANSI B16.11 for quality assurance. Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. When purchasing pipe fittings, consider the application, as this will affect material type, shape, size and required durability. Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness).