Hammer Union, Connection : Threaded Butt Weld End

Sealing :

• Low pressure Service (1000 to 2000 PSI Range), the spherical surface of the male sub and the cone shaped surface of the female provide a metal-to-metal seal.
• Medium Pressure Service (2000 to 4000 PSI Range), the metal-to-metal seal is supplemented with a resilient seal ring.
• High Pressure Service (6000 to 9000 PSI Range), A replaceable, lip type seal ring is part of the female sub. This seal ring reduces flow turbulence and protects the metal-to-metal seal from corrosion.

Indicates different Cold Working Pressure due to other design factor - Difference as shown below :

• 5", 6" 12" : Figure 400, Cold Working Pressure 2,500 PSI & Test Pressure 4,000 PSI
• 5", 6" : Figure 1002 Butt weld, Cold Working Pressure 7,500 PSI & Test Pressure 11,250 PSI Std. Service
• 4", 5" : Figure 1003 Butt weld, Cold Working Pressure 7,500 PSI & Test Pressure 11,250 PSI Std. Service
• 5", 6" : Figure 1002 Butt weld, Cold Working Pressure 5,000 PSI & Test Pressure 7,500 PSI Sour Service
• 4", 5" : Figure 1003 Butt weld, Cold Working Pressure 5,000 PSI & Test Pressure 7,500 PSI Sour Service
• 1/2" : Figure 300, cold working pressure 15,000 PSI & Test Pressure 20,000 PSI