A forged half coupling is a type of pipe fitting that is used to connect two lengths of pipe. It is made of forged steel, which gives it a high strength and durability. The half coupling has a threaded end that screws onto one end of the pipe, and a socket end that is welded or flanged to the other end of the pipe. Here are the technical specifications of a forged half coupling: Material: Forged steel Sizes: 1/4 inch to 4 inches Pressure ratings: 2000 psi, 3000 psi, and 6000 psi Temperature ratings: Up to 1000 degrees Fahrenheit Thread types: NPT, BSP, and BSPT Finishes: Black, galvanized, and stainless steel