Half coupling

A half coupling is a forged component with one connection end, commonly attached to a pipe, vessel, or equipment wall to create a connection point. Its functional distinction from a full coupling is the single connection end and the project-defined attachment of the other side to the host component; it is not simply a shorter full coupling. The name does not establish whether its end is threaded or socket-weld. Selection must define the end form, attachment to the host, local reinforcement and design review, material, load direction, and the project welding and inspection plan.