... playing a role in connecting with pipe. The Hammer Union can be used for cementing trucks,all kinds of ... end connections of pipe line thread,tubing thread,butt-weld. Hammer Union:Nominal pipe size:2”, 2-1/2”,3”,4 ... psi test.Connections Type:Pipeline thread,tubing thread,butt-weld.Componiet Parts:Nut,Male Sub,Female Sub,Seal RingSour ... -tight make-up with hammer,Economical,low-pressure union Hammer Union