Buttweld Concentric Pipe Reducer is a type of plumbing fitting used to connect sections of piping with different diameters. It is designed with a conical shape that gradually tapers from a larger diameter to a smaller diameter. The reducer is installed between two pipes and welded into place, creating a smooth transition between the two pipe sizes. Buttweld Concentric Pipe Reducer is commonly utilized in industrial applications such as oil and gas, chemical processing, and power generation to connect pipes of different sizes in a seamless and efficient manner.