OCTG - Coupling for Casing & Tubing

Couplings are short lengths of pipe used to connect 2 joints of tubing or casing.

They come with painted color codes on their external surface to indicate their grades.

Couplings are manufactured according to API 5CT and 5B specifications.

 Tubing Coupling:

OD: 2-3/8’’, 2-7/8’’, 3-1/2’’, 4’’, 4-1/2’’

Upset: Non Upset ----NU

      External Upset----EU

Steel Grade: H40?J55?K55?M65?N80-1?N80Q?L80?C95?C90?T95?P110?Q125

Casing Coupling:

OD: 4-1/2’’, 5’’, 5-1/2’’, 6-5/8’’, 7’’, 7-5/8’’, 8-5/8’’, 9-5/8’’, 10-3/4’’, 11-3/4’’, 13-3/8’’, 16’’, 18-5/8’’, 20’’

Threading:  Short Round-Thread Casing (STC)

Long Round-Thread Casing (LTC)

Buttress Thread Casing (BTC)

Steel Grade: H40?J55?K55?M65?N80-1?N80Q?L80?C95?C90?T95?P110?Q125