... Nominal pipe Size:1, 2, 3,4,6,8, 10; Pressure Rating:2000psi cwp;3000 psi test; Connections Type: ... Size:2, 2-1/2, 3,4,6,8,10,12; Pressure Rating:4000psi cwp;6000 psi test; Connections Type: ... suction, and mud service. Features 2-1/2 through 12 sizes have O-rings for primary seal; Butt-weld ... , fracturing, acidizing, testing, and choke and kill lines. 10, Figure 2002 Hammer Union Nominal pipe Size:2, 3; ...