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Warnings: 1. Do not mix Standard Service and Sour Gas Service Unions or parts.
2. Do not make up or break out Unions in pressurized lines.
3. Always use good safety practices, including use of safety glasses, when making up or breaking out Unions.
▲ Weld ends – Consult Factory. † Steel Forging Subs available – Consult Factory. TPI = Threads per inch. DI = Ductile Iron. SF = Steel Forging. BS = Bar Stock. ST = Steel Tubing.
Figure 200
Buttweld Ends
Schedule 40
Blue Nut/Gray Subs
Size Item Unit Weight A B C+ D TPI Material
NPS Dn lbs kg in mm in mm in mm Nuts Subs
† 2 50
Union Complete 5.50 2.49
3.275 83.19 2.825 71.76 5.900 149.86 ▲ 4
STD DI DI Nut 2.20 1.00
Male Sub 1.50 0.68
Female Sub 1.80 0.82
3 80
Union Complete 14.50 6.58
4.660 118.36 4.170 105.92 8.100 205.74 ▲ 4
STD DI SF
Nut 6.00 2.72
Male Sub 3.50 1.59
Female Sub 4.50 2.04
4 100
Union Complete 20.90 9.48
4.910 124.71 5.075 128.91 9.060 230.12 ▲ 3
MOD DI SF Nut 7.40 3.36
Male Sub 6.18 2.80
Female Sub 7.38 3.35
General purpose union. Threaded and butt weld ends available.
Wing Unions
2,000 psi cwp – 3,000 psi test
Figure 200C
Threaded Ends
Blue Nut/Gray Subs
Size Item Unit Weight A B C+ D TPI Material
NPS Dn lbs kg in mm in mm in mm Nuts Subs
1 25 Lug Union 1.75 0.79 2.670 67.82 1.640 41.66 4.065 103.25 * 6STD SF SF
2 50 Lug Union 4.90 2.22 3.275 83.19 2.825 71.76 5.900 149.86 * 4STD SF SF
Note: Available in import only. General purpose union. Available in threaded ends. *Consult Factory.