| Customization: | Available |
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| After-sales Service: | 1 Year |
| Warranty: | 1 Year |
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Couplings are short lengths of pipe used to connect 2 joints of tubing or casing.
They come with painted colour codes on their external surface to indicate their grades.
Couplings are manufactured according to API 5CT and 5B specifications.
| Tubing Coupling | |
| Pipe O.D. | 1.900, 2-3/8, 2-7/8, 3-1/2, 4, 4-1/2 in |
| Grade | J-55, C-75, L-80, N-80, C-95, P-110 |
| Thread Connection | EUE, NUE |
| Option | Electro-zinc plated Phosphorization |
| Standard | API 5CT, API 5B |
| Casing Coupling | |
| Pipe O.D. | 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 in |
| Grade | H-40, J-55, K-55, C-75, L-80, N-80, C-95, P-110, L80-13CR |
| Thread Connection | BTC, STC, LTC |
| Option | Electro-zinc plated Phosphorization |
| Standard | API 5CT, API 5B |
| Coupling pipe grade identification by paint color | |
| Grade | Color Coding (Painted Outside) |
| H-40 | Black |
| J-55 or K-55 | Green |
| N-80 | Red |
| M-65 or L-80 | Red with one Brown Band |
| L-80 Type 9CR | Red with two Yellow Bands |
| L-80 Type 13CR | Red with one Yellow Band |
| C-90 Type 1 | Purple |
| C-90 Type 2 | Purple with one Yellow Band |
| T-95 Type 1 | Silver |
| T-95 Type 2 | Silver with one Yellow Band |
| C-95 | Brown |
| P-110 | White |
| Q-125 Type 1 | Orange |
| Q-125 Type 2 | Orange with one Yellow Band |
| Q-125 Type 3 | Orange with one Green Band |
| Q-125 Type 4 | Orange with one Brown Band |
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