Full-Scene Corrosion-Resistant & High-Pressure Solutions for Offshore Engineering

I. Core Valve Types for Offshore: Tailored Solutions for Extreme Marine Conditions

1. Ball Valves – Rapid Shutoff Experts for Deep-Sea Oil & Gas

• Technical Advantages:
  • Bimetallic balls (2205 duplex stainless steel + Inconel overlay) offer 50% higher seawater corrosion resistance, with 20+ years service life in splash zones;
  • Metal seals compliant with API 6D SS (Subsea Service), achieving leakage ≤1×10⁻⁹ mbar·L/s across -20℃~150℃ cycles;
  • Anti-static and fire-safe designs meet ISO 14313, preventing explosions in flammable gas systems.
• Applications: Deep-sea christmas tree outlets, FPSO cargo tank shutoff, subsea pipeline jumpers—ideal for fast-switching in DN25-DN600.

2. Gate Valves – Sealing Benchmark for Large-Diameter Subsea Pipelines

• Technical Advantages:
  • PREN ≥40 for 3x higher crevice corrosion resistance, suitable for H₂S-containing hydrocarbons;
  • Flow-optimized 导流孔 reduce pressure drop by 20%, minimizing subsea pump energy consumption;
  • Anti-fouling coating (Patent No.: ZL2024XXXXXX) with Ra≤1.6μm surface to inhibit barnacle/algae growth.
• Applications: Offshore crude oil main pipelines (DN800-DN1200), subsea gas transmission lines, LNG FPSO loading arms—suitable for low-frequency, high-sealing large diameters.

3. Globe Valves – Precision Throttling for Subsea Flow Control

• Technical Advantages:
  • Hastelloy C-22 guide sleeves show wear rate <0.02mm/year in chloride-rich media;
  • Bellows seals prevent external leakage for high-pressure acidic gas (CO₂＞15%) in CO₂ flooding projects;
  • Deep-sea-rated electric actuators (IP68, 1,000m 水深) support ROV remote operation.
• Applications: Drilling mud pump outlet regulation, subsea christmas tree pressure control, offshore wind grouting systems—ideal for precise throttling in DN15-DN300.

4. Check Valves – Backflow Prevention for Subsea Safety

• Technical Advantages:
  • Swing discs with guide fins reduce minimum activation pressure to 0.05MPa for low-head subsea pumps;
  • HVOF-sprayed tungsten carbide seats extend erosion life to 15+ years for sand-laden media;
  • Rubber buffers reduce water hammer pressure by 70%, protecting subsea pipe welds and sensors.
• Applications: Offshore fire pump outlets, subsea multiphase pump inlets, seawater lift systems—critical for media with sand and marine debris.

5. Butterfly Valves – Efficient Large-Diameter Regulation for Marine Circulation

• Technical Advantages:
  • 500μm PTFE coating on discs offers 4x higher seawater electrochemistry corrosion resistance;
  • Lug-type bodies reduce weight by 60% compared to steel, ideal for platform 高空 pipelines and floating structures;
  • Hydraulic actuators respond in <1 second for emergency ballast adjustment and anti-sinking control.
• Applications: Offshore seawater desalination pre-treatment pipelines (DN1000+), FPSO ballast tank outlets, offshore wind substation cooling systems—suitable for large-flow quick regulation.

6. Safety Relief Valves – Final Barrier for Offshore Overpressure Protection

• Technical Advantages:
  • ±1% reseating accuracy minimizes unnecessary discharge of natural gas and condensate;
  • Cryogenic nickel-based alloy internals extend fatigue life by 50% at -40℃, compliant with ASME BPVC Section VIII-2;
  • Counterflow disc design reduces deep-sea backpressure effects for subsea separators and pumps.
• Applications: Offshore separator overpressure protection, LNG FPSO safety relief, subsea pipeline pressure control—meeting API 526 and ISO 4126 standards.

7. Cryogenic Valves – Specialized for Offshore LNG Terminals

• Technical Advantages:
  • Deep cryogenic treatment ensures ≥80J impact toughness at -196℃, 30% better than standard materials;
  • PTFE soft seals achieve Class VI bubble-tight sealing for LNG carrier unloading arms;
  • Lightweight aluminum alloy bodies reduce weight by 40%, lowering platform load and installation costs.
• Applications: Offshore LNG terminal vaporizer connections, FLNG cryogenic pipelines, liquid CO₂ storage systems—meeting extreme low-temperature tightness requirements.

II. YYF’s Core Competencies: Full-Dimensional Breakthrough for Offshore

1. Anti-Corrosion Material Leadership:
   • Proprietary YYF-O1 marine alloy (28%Cr, 3%Mo) shows corrosion rate <0.01mm/year in splash and full immersion zones, certified to NACE MR0175 and ISO 12944-C5-M;
   • FFKM seals offer 10+ years seawater aging resistance for humid saline atmospheres.
2. Pressure-Resistant Design:
   • Subsea valves use integral forged-welded structures, optimized via FEA for 25% higher pressure capacity than cast valves;
   • Stem anti-blowout design complies with API 6A, ensuring no axial displacement under 30MPa.
3. Intelligent Maintenance Empowerment:
   • YYF-Underwater IoT modules transmit valve status via acoustic communication, adapting to cable-free deep-sea environments;
   • Digital twin technology simulates performance under ocean current 冲击 and thermal shock, reducing unplanned downtime by 50%.
4. Global Compliance Assurance:
   • End-to-end traceability from material smelting (blockchain) to underwater testing (DNV GL certification);
   • Certifications include API 6D, NORSOK M-630, and CCS for global offshore project compatibility.

III. Addressing Procurement Priorities in Offshore

• Extreme Environment Reliability: 40% longer lifespan than conventional valves in high-salinity/high-H₂S environments, reducing diver maintenance;
• Maintenance Cost Optimization: Modular design enables ROV quick replacement, with 72-hour emergency delivery from 10 global offshore warehouses, cutting downtime losses by 60%;
• Green Energy Adaptation: Fatigue-resistant valves for offshore wind/tidal energy, certified by DNV GL for renewable energy, supporting client ESG goals.

IV. Industry Trends & YYF’s Forward-Looking Initiatives

• Ultra-Deep Sea Development: Titanium alloy valves for 6,000m 水深，solving hydrogen embrittlement and stress corrosion under ultra-high pressure;
• Carbon Neutrality: Duplex stainless steel valves resistant to CO₂ corrosion for offshore CCUS projects;
• Intelligent Upgrade: Wireless-charged smart valves collaborating with AUVs to build unmanned subsea pipelines.

V. Partner with YYF for Offshore Excellence