Classification：OCTG
- Standard & Specification: API 5CT , API 5B, ISO 11960 , GOST
- Steel Grade: H40, J55, K55, N80, L80-1, C90, C95C T95, P110 , M65
- Approved Marine Certificate: ABS/BV/LR/DNV/GL/KR, CCS , EN10204 3.2 MTC
- Special Service: Sweet Service, Sour Service, Anti-H2S, NACE MR0175/MR0103/ISO15156
- Produce Process: Cold Drawn, Hot Rolled, Hot Expanded
- Accessories: Pub joint, Coupling, Blast Joint, Crossover ect.
