Ultra-Low-Temperature Cryogenic Valves for Offshore & Marine Platform Applications

Product & Solution Overview for Offshore Platforms

This manufacturer focuses on R&D and production of high-performance cryogenic valves, covering operating temperature range -196 ℃ ~ +150 ℃. The product series is widely applied for floating LNG platforms, FPSO, marine LNG transfer systems, offshore energy facilities and marine green-fuel projects.

Offshore-applicable product scope includes cryogenic trunnion ball valves, triple offset butterfly valves, globe valves, gate valves, swing check valves and emergency shut-off valves.

• Size range: DN15-DN1150
• Pressure class: Class 150 ~ Class 2500
• Main body material: ASTM A351 CF8 / CF8M / CF3M austenitic stainless steel, providing reliable anti-brittleness performance under deep-cryogenic working conditions.

All valves are designed and tested in compliance with API 6D, API 607 fire-safe standard, BS 6364, PED, TÜV and TS pressure-equipment specifications. Each valve completes full-sequence factory validation: deep-cryogenic treatment, helium leak-detection, cryogenic cyclic performance test, NDE non-destructive examination and Charpy low-temperature impact toughness testing.

Core Advantages for Off-shore / Marine Platform Service

1. Optimized cryogenic material & anti-cold-deformation design Proprietary deep-cryogenic phase-change compensation technology mitigates material shrinkage and sealing-failure risks under -196 ℃ offshore operating environments. Metal-to-metal hard-sealing construction achieves bubble-tight zero-leakage performance, resisting platform vibration, mechanical shock and repeated thermal cycling on floating offshore installations.
2. Long-extended-bonnet and cavity self-relief marine-safety structure Long-extended bonnet separates packing set from ultra-cold process medium, effectively preventing packing freeze-up and external moisture icing risk. Built-in cavity self-relief function releases trapped thermal-expansion pressure inside valve body, eliminating over-pressure hazards for blocked-in offshore cryogenic pipelines.
3. Large-bore offshore-grade product capability The manufacturer has delivered first-set large-size 42-inch / 46-inch Class 150 ultra-low-temperature triple-offset butterfly valves for LNG-related projects. Top-entry maintainable structure permits on-site trim overhaul directly from valve top, without removing the whole valve body from offshore piping. This greatly cuts expensive offshore platform maintenance man-hours and plant shutdown duration.
4. Marine-environment adaptability Custom anti-salt-spray corrosion surface coating for offshore salt-fog atmosphere; anti-vibration internal trim assembly to adapt FPSO / floating-platform swaying working conditions. Products are qualified for marine green-fuel circuits, including LNG, ammonia and liquid-hydrogen fuel supply pipelines.
5. In-house complete cryogenic test laboratory Full-set domestic ultra-low-temperature test benches support full-immersion-type-196 ℃ cryogenic performance verification. Core cryogenic performance tests are completed internally instead of outsourcing to third-party labs, ensuring consistent and repeatable performance for safety-critical offshore valves.
6. Total-cost benefit compared with oversea imported alternatives Shorter lead-time versus European / US imported offshore cryogenic valves with competitive total-of-ownership-cost. Global-oriented technical support is available for offshore project commissioning, troubleshooting and complete technical-document delivery.

Typical Offshore Application Scenarios

- FPSO & floating LNG production / storage units - Off-shore platform LNG cryogenic process pipelines & BOG handling systems - Marine LNG loading & off-loading transfer systems - Green-fuel (LNG / ammonia / liquid-hydrogen) supply systems for marine & offshore installations - Off-shore air-separation / cryogenic utility systems