... playing a role in connecting with pipe. The Hammer Union can be used for cementing trucks,all kinds ... pipes,It is an important part for transproting oil.Water fracturing fluid and mixed fluid.These poroducts are ... connections of pipe line thread,tubing thread,butt-weld. Hammer Union:Nominal pipe size:2”, 2-1/2”, ... line connectionFeatures:Pressure-tight make-up with hammer,Economical,low-pressure union ...