Socket-weld cap

A socket-weld cap closes a line end by receiving the pipe end in a socket and forming a permanent welded joint. It differs from a threaded plug inserted into a threaded opening, a threaded cap, a butt-weld cap, and a bolted blind flange. The joint is not intended for routine removal. Selection should address pipe-end diameter and wall, socket fit and assembly gap, material, welding procedure, inspection, and trapped-pressure conditions in line design and maintenance. The product name alone does not establish a pressure class or standards compliance.