HAMMER UNIONS

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 rating s up to 20,000 PSI cold working pressure. Unions for sour gas service are manufactured in accordance with NACE M R-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 ‘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.

Coating

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.

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 are used to ensure better service and longer life in extreme conditions.

Quick Reference Table

The following table giving figures of unions, end connections and pressure rating is given for quick reference (Click image for detail description).

UNION FIG. END CONNECTIONS ASSEMBLY COLOR CODE STANDARD TYPE 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