Threaded joints probably represent the oldest method of joining piping systems. Threaded fittings are mainly used for small pipe diameters (Small Bore Piping); generally for piping whose nominal diameter is NPS 2 or smaller. Threaded piping is commonly used in low-cost, noncriticmore...
A Socket Weld is a pipe attachment detail in which a pipe is inserted into a recessed area of a Valve, fitting or flange. In contrast to buttweld fittings, Socket Weld fittings are mainly used for small pipe diameter (small bore piping); generally for piping whose nominal diametemore...