About Hammer Unions

TSI Hammer Unions are the most complete line of standard and sour-gas service pipe connectors in the world. Available in 1 to 12-inch nominal pipe sizes with cold working pressures up to 20,000 psi, TSI Hammer Unions are manufactured using the finest raw materials, tooling procedures, and heat-treating techniques available. Materials meet ASTM and AISI standards. Each Union is carefully inspected to ensure long, dependable service in the most extreme conditions.

Hammer Union Designs

	Figure 100 1,000 psi cold working pressure Recommended service Manifold and line connections Features • Pressure-tight make-up with hammer • Economical low-pressure union		Figure 602 6,000 psi cold working pressure Recommended service Manifold line connections and mud service Features • Replaceable, lip-type seal provides primary seal, protects secondary metal-to-metal seal, and minimizes flow turbulence • Butt-weld available
	Figure 200 2,000 psi cold working pressure Recommended service General service manifolds and lines Features • Economical, general-purpose union • 1 to 4-inch sizes		Figure 1002 10,000 psi cold working pressure through 4-inch sizes; 7,500 psi cold working pressure, 5 and 6-inch sizes Recommended service Cementing, fracturing, acidizing, testing, and choke-and-kill lines Features • Replaceable, lip-type seal • 5 and 6-inch sizes have O-rings for primary seals • Available for sour gas service: 7,500 psi cold working pressure • Butt-weld available
	Figure 400 4,000 psi cold working pressure through 4-inch sizes; 2,500 psi cold working pressure, 5 through 12-inch sizes Recommended service Manifold line connections, pump suction, and mud services Features • 2-1/2 through 12-inch sizes have O-rings for primary seal • Butt-weld available		Figure 1502 15,000 psi cold working pressure Recommended service Cementing, fracturing, acidizing, testing, and choke-and-kill lines Features • Replaceable, lip-type seal • Available for sour gas service: 10,000 psi cold working pressure; butt-weld or non-pressure seal configurations only • Butt-weld available Figure 400 4,000 psi cold working pressure through 4-inch sizes; 2,500 psi cold working pressure, 5 through 12-inch sizes Recommended service Manifold line connections, pump suction, and mud services Features • 2-1/2 through 12-inch sizes have O-rings for primary seal • Butt-weld available
	Figure 600 6,000 psi cold working pressure Recommended service Steam service, boiler connections, and manifold line connections for production, drilling, and well servicing Features • Bronze seat provides primary seal; will not rust in water services

Proven Seal Designs

Low-Pressure Services (1,000 to 2,000 psi)

TSI Hammer Unions for low-pressure services feature a primary
metal-to-metal seal. The spherical surface of the male sub and
the conical surface of the female sub provide a large, ball-andcone
sealing surface. This metal-to-metal seal remains leak-proof
even when one surface is slightly pitted or misaligned.

Medium-Pressure Services (2,000 to 4,000 psi)

Many TSI Hammer Union designs supplement the metal-tometal
seal with a resilient O-ring in the male sub. The replaceable
O-ring extends union life and protects the metal-to-metal seal
against corrosion.

High-Pressure Services (6,000 to 20,000 psi)

TSI Hammer Unions for high-pressure services feature a
replaceable, lip-type seal ring in the female sub. This primary
seal protects the secondary metal-to-metal seal from abrasion
and corrosion while minimizing flow turbulence.

NPS (Non-Pressure Seal) Option

Figures 602, 1002, and 1502
The TSI non-pressure seal option is especially designed for
abrasive, high-pressure Hammer Union services where welded
connections are undesirable. This design provides strong,
permanent end connections without butt welding. The union
ends are shop assembled to pipe or tubing. An epoxy thread
compound is used to secure the connection.