Haige provides full sizes and steel grades Tubing Couplings and Casing Couplings for oil and gas as per API Specification 5CT.
Tubing Couplings Specifications:
Diameters: 2 3/8″, 2 7/8″, 3 1/2″, 4 1/2″
Grades: J55, K55, N80-1, N80Q, L80, P110, Q125
Connections: EUE, NUE
Other options:
Special Beveled Couplings
Special Clearance Couplings
Directive 10 ( D-10 ) Couplings
Special dimensions upon request
Stocks availability: 2 3/8″, 2 7/8″, 3 1/2″, 4 1/2″






