... Male Nut & Female Nut & Seat Ring HAMMER UNION FIG 206The Hammer Union can be used for cementing trucks, ... of pipeline thread, tubing thread, butt-weld.The Hammer Union type mainly consists of Figure 100, Figure ... 1003,Figure 1502 and Figure 2002.FIGURE 206 HAMMER UNIONNominal pipe Size:1”, 2”, 3”,4”, ... seal against corrosion;Replaceable O-ring extends union service life. Weco Hammer Union FIG 206