Hammer Unions

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General
ACT manufactures Hammer Unions from raw materials in the form of forgings or castings in accordance with service requirements in sizes 1 to 12" with ratings up to 20,000 PSI cold working pressure. Unions for sour gas service are manufactured in accordance with NACE MR-01-75 & API RP-14E.

Interchangeability
ACT's Hammer Unions are interchangeable with WECO or other manufacturers adhering to the industry standards.

Thread Gauging
Acme thread and line pipe threads are gauged by standard plug & ring gauges.

Sealing Design
The conical and spherical surfaces of the female and male subs respectively form an effective metal-to-metal seal in case of low pressure services.

For medium pressure mostly an '0' ring is provided in the male sub in addition to the metal to metal seal. For high pressure a lip type seal ring is provided for primary seal in the female sub. The seal protects the secondary metal to metal seal from corrosion and limits fluid flow turbulence. For sour service applications viton seals are provided.

Quality Control
ACT unions are manufactured using modern manufacturing techniques to attain first class workmanship and dimensional control. Correctly chosen raw materials for a particular service together with correct heat-treatment process is used to ensure better service and longer life in extreme conditions.

Notes
1. Line pipe threads in Fig-1002, Fig 1502 for Pipe diameters above 4" are not recommended for sour service application.
2. For Fig-1003, 4" & 5" sizes are rated at 7500 PSI cold working pressure and 12000 PSI test pressure.
3. Sour gas service unions are painted OLIVE GREEN and stamped "NACE".
4. For other types of threading like casing, tubing or NPS thread seal configuration, consult factory.

Quick Reference Table
The following table giving figures of unions, end connections and pressure rating is given for quick reference.

Union Fig. End Connections Pressure Rating (PSI)
Standard Service Sour Service
C.W.P. T.P. C.W.P. T.P.
50 LINE PIPE 500 750 - -
100 LINE PIPE 1000 1500 - -
200 LINE PIPE/BUTT WELD 2000 3000 - -
206 LINE PIPE/BUTT WELD 2000 3000 - -
207 LINE PIPE/BUTT WELD 2000 3000 - -
211 LINE PIPE 2000 3000 - -
400 LINE PIPE/BUTT WELD 2500 3750 2500 3750
400 LINE PIPE/BUTT WELD 4000 6000 4000 6000
600 LINE PIPE/BUTT WELD 6000 9000 - -
602 LINE PIPE/BUTT WELD/NPTS 6000 9000 6000 9000
1002 LINE PIPE/BUTT WELD/NPTS 10000 15000 7500 12000
1003 LINE PIPE/BUTT WELD 10000 15000 7500 12000
1004 LINE PIPE/BUTT WELD 10000 15000 7500 12000
1502 LINE PIPE/BUTT WELD/NPTS 15000 22500 10000 15000
2002 BUTT WELD 20000 30000 - -
2202 BUTT WELD - - 15000 22500


Orange Nut - Orange Subs


Fig 50. Orange Nut - Orange Subs
These low pressure and suction union of Fig-50 are made from carbon steel. The nut and O-ring are common in both sizes. Available in 4" or 5" sizes in threaded & socket welded connection. These unions are suitable for 500 PSI wp.


Size
(inch)
A B C ACME
(TPI)
Union Weight
Threaded Socket Welded End Threaded Socket Welded End
Inch mm Inch mm Inch mm Inch mm lbsf kgf lbsf kgf
4" 6.0 152.5 5.07 129.0 6.15 156.21 4.12 104.64 3MOD 28.0 12.7 27.0 12.24
5" 6.0 152.5 5.07 129.0 5.77 146.74 4.12 104.64 3MOD 23.0 10.43 21.5 9.75


Black Nut - Yellow SubsFig 100. Black nut - Yellow subs
These low pressure unions are ideal for manifold and applications where CWP does not exceed 1000 PSI.

SIZE
A B C ACME
(TPI)
UNION WEIGHT
INCH MM INCH MM INCH MM LBSF KGF
1 1.60 40.5 1.95 50 2.57 65 6STD 1.75 0.79
2 2.74 69.5 2.91 74 3.66 93 3MOD 5.73 2.60
2 1/2 3.30 84 3.81 97 4.29 109 3MOD 9.47 4.30
3 4.09 104 4.09 104 4.88 124 3MOD 1.33 6.05
4 5.19 132 5.00 127 5.78 147 3MOD 19.84 9.00
5 6.37 162 5.75 146 6.03 153 4STD 33.00 15.0
6 7.36 187 6.92 176 6.71 170.5 3STD 46.0 20.90
8 9.52 242 8.00 203 7.20 183 3STD 61.72 28.0


Blue Nut - Grey Subs
Fig 200. Blue Nut - Grey subs
These unions are best suited for medium pressure ranges involving air, water, oil & gas service for cold working pressure upto 2,000 PSI. (For dimensions see fig. 206). Upto 4" no O-ring is used on the male sub. Beyond 4" size, an O-Ring is used on the male sub for sealing.


Blue Nut - Grey Subs Fig 206. Blue Nut - Grey subs
These unions have an additional 'O' ring on the spherical surface of the male sub providing a leak proof seal. All dimensions of fig:- 200 & Fig-206 are identical.

SIZE
A B C ACME
(TPI)
UNION WEIGHT
INCH MM INCH MM INCH MM LBSF KGF
1 1.59 40.5 1.96 50 2.55 65 6STD 1.76 0.80
1 1/4 2.00 51 2.11 53.6 2.79 71 6STD 2.20 1.00
1 1/2 2.28 58 2.52 64 2.73 69.5 6STD 2.42 1.10
2 2.79 71 2.91 74 3.54 90 4STD 5.00 2.30
2 1/2 3.30 84 3.87 98.5 4.25 108 4STD 9.25 4.20
3 4.17 106 3.89 99 4.52 115 4STD 13.67 6.20
4 5.23 133 4.52 115 4.96 126 3MOD 18.52 8.40
5 6.32 162 5.75 146 6.03 153 4STD 33.0 15.0
6 7.50 190.5 6.06 154 6.65 169 3STD 42.50 19.30
8 9.56 243 7.18 182.5 7.15 181.5 3STD 61.70 28.0
1 11.49 292 9.01 220.7 9.09 231 3STD 90.39 41.00


Blue Cap - Grey Subs Fig 207. Blue Cap - Grey Subs
These banking unions have a resilient 'O' ring in the blanking cap to provide an efficient and leak-proof seal suitable for 2000 PSI CWP.

SIZE
A B C ACME
(TPI)
UNION WEIGHT
INCH MM INCH MM INCH MM LBSF KGF
3 4.09 104 2.91 74 3.74 95 4STD 10.36 4.70
4 5.15 131 3.58 91 4.33 110 3MOD 16.30 7.40
6 7.55 192 5.00 127 5.90 150 3STD 38.13 17.30
8 9.60 245 6.10 155 6.10 220 3STD 70.76 32.10
10 11.53 293 7.16 182 7.16 248 3STD 96.11 43.60


Blue Subs - Grey Nut Fig. 211. Blue Subs - Grey Nut
These unions protect against electrolytic action. There is no metal - to - metal contact between the subs. A resilent seal ring in the female sub provide additional sealing and protection from corrosion. Suitable for 2000 PSI CWP.

SIZE
A B C ACME
(TPI)
UNION WEIGHT
INCH MM INCH MM INCH MM LBSF KGF
1 1.57 40 2.09 53 2.72 69 6STD 2.20 1.00
1 1/4 2.20 56 2.43 62 3.00 76 6STD 3.70 1.68
1 1/2 2.20 56 2.43 62 3.00 76 6STD 3.20 1.45
2 2.84 72.2 3.07 78 3.49 88.8 4STD 6.40 2.90
2 1/2 3.38 86 3.67 93 4.13 105 4STD 9.70 4.40
3 4.09 104 3.96 101 4.45 113 4STD 15.80 7.16
4 5.12 130 4.68 119 4.84 123 3MOD 18.40 8.34
6 7.56 192 7.25 184 7.21 183 3STD 43.50 19.60
8 9.62 244 8.75 222 9.12 232 3STD 65.50 29.50


Black Nut - Red Subs Fig 400. Black Nut - Red Subs
These unions are rigid in design and have all the three parts made of steel forgings. These unions are best suited for manifold and line connections. Unions from 3 inch through 8 inch sizes have O- rings for primary sealing. From 5" to 8" sizes C.W.P. is 2,500 PSI.

SIZE
A B C ACME
(TPI)
UNION WEIGHT
INCH MM INCH MM INCH MM LBSF KGF
1 1.75 44.5 2.28 58.0 3.54 90.0 3STD 3.0 1.35
2 3.06 76.8 3.44 87.5 5.24 133 3STD 11.00 5.00
2 1/2 3.54 90 4.17 106 6.18 157 3STD 16.3 7.40
3 4.19 106.6 4.29 109 6.18 157 3STD 19.40 8.80
4 5.23 133 4.74 120.5 8.25 209.7 3STD 28 12.70
5 6.26 159 5.63 143 10.47 266 3STD 48.5 22.0
5 1/2 6.29 160 5.78 147 10.43 265 3STD 48.0 21.80
6 7.75 197 6.52 165.6 11.02 280 3STD 75.0 34.0
7 7.75 198 6.62 168 11.03 280 3STD 61 27.70
8 9.59 243.5 7.71 196 11.42 290 3STD 94.13 42.70
10 11.75 298.4 9.60 244 11.29 287 3STD 121.2 55.0
12 13.98 355 10.62 270 11.02 280 3STD 158.7 72.0