In the pipeline system, the Large OD elbow is a pipe fitting that changes the direction of the pipeline. The elbow materials are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.

Since most of the pipe fittings are used for welding, in order to improve the welding quality, the ends are beveled, the angle left, and the side of the belt. This requirement is also strict. The thickness of the side, the angle and the deviation range are stipulated. The surface quality and mechanical properties are basically the same as the pipe. For the convenience of welding, the steel grade of the pipe and the connected pipe are the same.

The ways to connect with the pipe are: direct welding (the most common way) flange connection, hot melt connection, electrofusion connection, threaded connection and socket connection. This type of elbow generally needs to be produced according to specific engineering requirements or specific drawings.

 In addition to meeting the requirements of the  Large OD elbow, it also considers the specific conditions of the pipe, such as pipe transportation pressure, fluid viscosity, abrasiveness, corrosivity, and fluid delivery temperature. And many other factors.