Forged Threaded Half Coupling
The Forged Threaded Half Coupling is a single-outlet fitting used to create a threaded branch connection on a pipe, vessel wall, tank shell or header. One end features a precision-cut female NPT thread that accepts a threaded pipe, nipple or instrument fitting. The opposite end is a plain face machined flat and perpendicular to the thread axis, designed for direct butt-welding onto the run pipe or vessel wall.
Unlike a full coupling, the half coupling has only one threaded end, making it the standard fitting for adding a threaded instrument tapping, drain, vent or gauge connection onto piping systems and pressure vessels without introducing a second mechanical joint. It is also widely specified as a weld-on threaded boss wherever a screwed instrument or utility connection is required on a nozzle.
Cunimet Alloy International manufactures threaded half couplings through closed-die forging in one piece, ensuring an integral, full-strength body at the critical thread-to-face junction with no seams or casting porosity. Threads are cut on CNC turning centres to ASME B1.20.1 (NPT) tolerances and 100% go/no-go gauge inspected before dispatch.