News
| API Certificates (API Q1, API 5CT, API 5B) | Dongfanglong | 2026-07-29 |
| API 5CT Casing & Tubing Compliant with Latest 11th... | Dongfanglong | 2026-06-29 |
| Oil Casing & Tubing Product Introduction | Dongfanglong | 2026-05-29 |
| Steel Casing Pipe API 5CT | Dongfanglong | 2026-04-28 |
| API 5CT: Casing and Tubing | Dongfanglong | 2026-03-31 |
| Functions and Applications of Oil Casing | Dongfanglong | 2026-02-28 |
| oil casings | Dongfanglong | 2026-01-29 |
| Tubing & Casing Product Introduction (OCTG) | Dongfanglong | 2025-12-29 |
| API 5CT Couplings | Dongfanglong | 2025-11-01 |
| The International Energy Agency (IEA) has lowered ... | Dongfanglong | 2025-10-28 |
