H2S Stress Corrosion Resistant Oil Casing – Product Introduction‌

‌Material Technology‌
Engineered with Cr-Mo-Nb-V microalloyed steel, this casing series (CB80S-CB110SS grades) achieves HRC≤22 hardness through precise quenching & tempering, effectively resisting sulfide stress cracking (SSC) in environments with H2S partial pressure >0.0003MPa. The metallurgical design incorporates ultra-low sulfur (S≤0.005%) and phosphorus (P≤0.025%) to minimize hydrogen-induced cracking risks.

‌Key Specifications‌

• ‌Standards Compliance‌: API 5CT with NACE MR0175/ISO 15156 certification
• ‌Performance‌:
  • SSC resistance verified per NACE TM0177 Method A/D testing
  • CAL IV gas-tight connection qualification (ISO 13679)
• ‌Service Limits‌: 150℃ max temperature in 15% H2S environments

‌Applications‌

• Sour gas wells (>0.01% H2S concentration)
• High-pressure acid gas injection systems

‌Available Options‌

• Internal epoxy coatings for enhanced corrosion protection
• CBS/FJ series premium connections with metal-to-metal seals