... playing a role in connecting with pipe. The Hammer Union can be used for cementing trucks,all kinds ... of pipe line thread,tubing thread,butt-weld. Hammer Union:Nominal pipe size:2”, 2-1/2”, ... Connections Type:Pipeline thread,tubing thread,butt-weld.Componiet Parts:Nut,Male Sub,Female Sub,Seal RingSour Service ... line connectionFeatures:Pressure-tight make-up with hammer,Economical,low-pressure union ...