Steel Casing Pipe – casingtube
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| API 5ct l80 casing tubing grade Color codes | ||||
| Grade | Grade Type | Number and Color of Bands for product a with length ³ 1.8 m | Color(s) for couplings | |
| Entire Coupling | Band(s) b, c | |||
| 1 | 2 | 3 | 4 | 5 |
| H40 | — | None or black band at the manufacturer’s option | None | Same as for pipe |
| J55 tubing | — | One bright green | Bright green | None |
| J55 Casing | — | One bright green | Bright green | One white |
| k55 | — | Two bright green | Bright green | None |
| n80 | 1 | One red | Red | None |
| N80 | Q | One red, one bright green | Red | Green |
| R95 | — | One brown | Brown | None |
| L80 | 1 | One red, one brown | Red | One brown |
| L80 | 9Cr | One red, one brown, two yellow | None | Two yellow |
| L80 | 13Cr | One red, one brown, one yellow | None | One yellow |
| C90 | 1 | One purple | Purple | None |
| T95 | 1 | One silver | Silver | None |
| C110 | — | One white, two brown | White | Two brown |
| p110 | — | One white | White | None |
| Q125 | 1 | One orange | Orange | None |
| a In the case of coupling Material, unless otherwise specified in the purchase agreement, the manufacturer’s internal requirements shall govern. | ||||
| b special clearance couplings shall also have a black band. | ||||
| c Seal-ring couplings shall also have a blue band. | ||||
