... with hammer; Economical, low-pressure union 2, Figure 200 Hammer Union Nominal pipe Size:1, 1-1/4, ... seal; Butt-weld available. 5, Figure 600 Hammer Union Nominal pipe Size:1, 2, 3, 4; Pressure Rating ... connections and mud service. 7, Figure 1002 Hammer Union Nominal pipe Size:1, 2, 3, 4,5,6 ... choke and kill lines. 10, Figure 2002 Hammer Union Nominal pipe Size:2, 3; Pressure Rating: 20000psi cold working ...