... transporting oil. Water, fracturing fluid and mixed fluid .The Hammer Union type mainly consists of Figure 100, Figure 200, Figure ... connections. Features Pressure-tight make-up with hammer; Economical, low-pressure union 2, Figure 200 Hammer Union Nominal pipe Size:1, 1 ... acidizing, testing, and choke and kill lines. 10, Figure 2002 Hammer Union Nominal pipe Size:2, 3; Pressure Rating: 20000psi cold ...