... the branch or other fittings such as nipple, thread plug,instrument and valve by Butting-welding, socket ... -welding and thread. TypeConnected typeGB19326 Socket weldedGB19326 Pipe threadGB19326 Butt- ... customers' requirementsProduction TypeElbow,Equal Tee,Reducer Tee,crossHalf-Coupling,Full-Coupling,Cap,Weldolet, Threadolet,Union,Nipple,Swage Nipple,Hexagonal ...