Oilfield Unions

Use the switchboard or click on the Union Color Code below to get full details regarding each union configuration.
Use the following guidance table for fast reference about Kemper Hammer Unions.
Please reference the table footer for unions with modified working and test pressures.

Figure Number Standard Service Color Code Non-Shock Cold Working Pressure Rating (psi) Nominal Pipe Size (Inches) Standard Service H2S Service 1 1¼ 1½ 2 2½ 3 4 5 6 8 10 12 CWP Test CWP Test 100 1000 1500 --- --- - - - - - 101 1000 1500 --- --- - - - - - - -   - - - - 200 2000 3000 2000 3000 - 201 2000 3000 2000 3000 - - - - - - - - - - 206 2000 3000 2000 3000 - 207 2000 3000 2000 3000 - - - - - - - - - 211 2000 3000 --- --- - - - - - - - - - - 300 2000 3000 --- --- - - - - - - - - - - 400 4000 6000 4000 6000 - - - - - 402 4000 6000 4000 6000 - - - - - - - - - - - 600 6000 9000 --- --- - - - - - - - "G" 6000 9000 6000 9000 - - - - - - - - - 602 6000 9000 6000 9000 - - - - 1002 10000 15000 7500 12000 - - - - - 1003 7500 12000 5000 7500 - - - - - - - - 1502 15000 22500 10000 15000 - - - - - - 2002 20000 30000 --- --- - - - - - - - - - - 2202 --- --- 15000 22500 - - - - - - - - - - Figure Number Standard Service Color Code CWP Test CWP Test 1 1¼ 1½ 2 2½ 3 4 5 6 8 10 12 Standard Service H2S Service Non-Shock Cold Working Pressure Rating (psi) Nominal Pipe Size (Inches)                                     * Indicates reduced Cold Working Pressure due to Pipe Size or other design factor - Reduction as shown below; 5", 6", 10", 12" Figure 400 - CWP = 2500 psi - Test = 4000 psi 5" Figure 1002 w/ LPT Ends - CWP = 5000 psi - Test = 7500 psi 5", 6", Figure 1002 B/W - CWP = 7500 psi - Test = 12000 psi 5", 6" Figure 1003 B/W - CWP = 7500 psi - Test = 12000 psi Sour Gas Service Prepped 5", 6" Figure 1002 B/W - CWP = 5000 psi - Test = 7500 psi Sour Gas Service Prepped 5" Figure 1003 B/W - CWP = 5000 psi - Test = 7500 psi Sour Gas Service Prepped 6" Figure 1003 B/W - CWP = 7500 psi - Test = 12000 psi The guidance table above should be used for reference only. Modification of the guidance specifications exist in the detailed configuration notes where applicable. Please click through to the Figure Number pages using the Color Code symbol for more detailed information and specification limitations.

Figure 100 (1,000 psi Cold Working Pressure)
w/ LPT Ends (Black Nut / Yellow Subs) Cast Ductile Iron Hammer Unions
recommended for low pressure line connections and manifolds.

Figure 101 (1,000 psi Cold Working Pressure)
w/LPT or Tubing Thread Ends (Beige Nut / Yellow Subs)Cast Ductile Iron Hammer Unions withFlat-Face
O-Ring seal recommended for line connections where straight breakout of short pipe segments is required.

Figure 201 (2,000 psi Cold Working Pressure)
w/ LPT or Upset Tubing Ends (Gold Nut / Gray Subs) Cast Ductile (2" LPT End Union Nut only)
and Forged Carbon Steel Hammer Unions with Flat-Face O-Ring seal recommended for
line connections where straight break out of short pipe segments is required.

Figure 200 (2,000 psi CWP)
w/ LPT Ends (Blue Nut / Gray Subs) Cast Ductile and Forged Carbon Steel
Hammer Unions recommended for 2,000 psi maxium line connections and manifolds.

Figure 211 (2,000 psi CWP) Insulating Union
w/ LPT Ends (Gray Nut / Blue Subs) Forged Carbon Steel Hammer Unions with insulating seals
and flange rings, recommended for 2,000 psi systems where static or electolytic corrosion is a problem.

Figure 400 (4,000 psi CWP)
w/ LPT Ends (Black Nut / Red Subs) Forged Carbon and Alloy Steel Hammer Unions
recommended for 4,000 psi maxium manifold connections, suction lines and mud systems.

Figure 300 (2,000 psi CWP)
w/ LPT Ends (Gray Nut / Yellow Subs) Forged Carbon Steel Hammer Unions with Flat-Face
O-Ring seal recommended for interchangeability where straight breakout of short pipe segments is required.

Figure 600 (6,000 psi CWP)
w/ LPT Ends (Black Nut / Silver Subs) Forged Carbon Steel Hammer Unions with Bronze Seat insert,
recommended for production and service systems where boiler water or steam seat corrosion is a problem.

Figure 402 (4,000 psi CWP)
w/ LPT Ends (Black Nut / Black Subs) Forged Carbon and Alloy Steel Hammer Unions with
elastomeric "lip" type Seal Ring, recommended for manifold connections, suction lines and mud systems.

Figure 602 (6,000 psi CWP)
w/ LPT Ends (Black Nut / Orange Subs) Forged Alloy Steel Hammer Unions with Buna N
elastomer "lip" type Seal Ring, recommended for line connections, manifolds, mud and service systems.

Figure 1002 (10,000 psi CWP - 5" & 6" 7,500 psi CWP)
w/ LPT Ends (Red Nut / Blue Subs) High Pressure Forged Alloy Steel Hammer Unions with Buna N elastomer "lip" type
Seal Ring (O-Ring in 5" and 6") recommended for service systems including cementing, fracturing, acidizing and choke lines.

Figure 1003 (3" 10,000 psi, 4" 7,500 psi CWP)
Mis-aligning Union w/ LPT Ends (Black Nut / Green Subs)
Forged Alloy Steel Hammer Unions with Nitrile O-Ring, recommended for high pressure water, oil, mud or gas
service where alignment of piping is a problem, with up to 7 1/2° angular ajustment from center (15° total).

Figure 1502 (15,000 psi CWP)
w/ LPT Ends (Blue Nut / Red Subs) Extra High Pressure Forged Alloy Steel Hammer Unions withBuna N elastomer
"lip" type Seal Ring recommended for service systems including cementing, fracturing, acidizing and choke lines.

Figure 2002 (20,000 psi CWP)
w/ Buttweld Ends (Green Nut / Gray Subs) Ultra High Pressure Forged Alloy Steel Hammer Unions wit
Nitrile elastomer "lip" type Seal Ring, for service systems including cementing, fracturing, acidizing,
or choke-and-kill lines, where welded fittings are required.

Figure 2202 (15,000 psi CWP)
w/ Buttweld Ends (Green Nut / Gray Subs) Extra High Pressure Forged Alloy Steel Hammer Unions
prepped for H2S (Sour Gas) Service with Viton fluoroelastomer "lip" type Seal Ring, for service systems
including cementing, fracturing, acidizing, or choke-kill lines, where welded fittings are required.

Figure "G" (6,000 psi CWP)
w/ LPT Ends (Yellow Nut / Silver Subs) Forged Carbon Steel Hammer Unions with
"vee lip" type Seal Ring recommended for interchangeability with like line or manifold connections.

Kemper Engineered Special Variations of our Standard Products are produced to order to
suit any extraordinary customer requirement. Our engineering creativity and innovation have consistently
enabled our customers to meet their unique flow control objectives, with economy, short lead time, and high quality.