Socket-weld fittings are a type of pipe fittings, which are machined pipeline connectors forged from stainless steel round bars or ingots.

Its connection type is Socket Welding-SW, where steel pipes are inserted into socket holes for welding. The main manufacturing standards are ANSI/ASME B16.11, HG/T 21634, MSS SP-83, MSS SP 79, and GB/T 14383-2008.

The stainless steel socket and spigot fittings variety includes 45° elbows, 90° elbows, tees, crosses, 45° reducing tees, double-end socket ferrules, single-end socket ferrules, pipe caps, swivel joints, branch supports, etc. Among them, tees and crosses come in both equal and unequal diameters; similarly, double-end socket ferrules also feature equal and unequal diameters, with the unequal diameter ones further categorized into concentric and eccentric types.