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.
ACT’s Hammer Unions are interchangeable with WECO or other manufacturers adhering to the industry standards.
Acme thread and line pipe threads are gauged by standard plug & ring gauges.
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 ‘O’ 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.
As a special case ACT can also provide Unions with zinc galvanized coating. Unions are also supplied with special materials such as stainless steel, SS-304, SS-316, Duplex etc.
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 are used to ensure better service and longer life in extreme conditions.
- Line pipe threads in Fig-1002, Fig-1502 for pipe diameters above 4″ are not recommended for sour service application.
- For Fig-1003, 4″ & 5″ sizes are rated at 7500 PSI cold working pressure and 12000 PSI test
- Sour gas service unions are painted OLIVE GREEN and stamped
- For other types of threading like casing, tubing or NPS thread seal configuration, consult