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Performance Characteristics and Parameters of LNG Breakaway Valves
2020-01-02
(Content Translation)
The LNG breakaway valve (Emergency Release Coupling - ERC) is designed for extreme safety and reliability in cryogenic LNG transfer. Below are its key performance characteristics and parameters:
1. Performance Characteristics:
-
Instantaneous Disconnection:
Activates within milliseconds upon exceeding predefined force thresholds (tension/bending). -
Zero Leakage After Activation:
Dual sealing mechanism (e.g., spring-loaded ball valves) ensures leak-tight closure on both ends. -
Cryogenic Resilience:
Materials (e.g., SS316L, cryogenic seals) withstand -162°C without brittleness or failure. -
Dual-Trigger System:
Combines mechanical overload activation and manual pull-cable emergency release. -
Single-Use Design:
Sacrificial components require full replacement after activation. -
Corrosion Resistance:
Compatible with marine environments and LNG’s chemical properties.
2. Key Parameters:
| Parameter | Typical Value/Range |
|---|---|
| Operating Temperature | -196°C to +50°C (focused on -162°C) |
| Maximum Working Pressure | 10-20 bar (varies by design) |
| Trigger Force | Calibrated per application (e.g., 5-15 kN for truck loading, 20-50 kN for marine arms) |
| Seal Type | Metal-to-metal or PTFE-enhanced seals |
| Connection Type | Flanged (ANSI/ASME standards) or welded |
| Standards Compliance | ISO 28460, OCIMF, SIGTTO, ASME B31.3 |
| Material | Stainless steel 316L, cryogenic alloys |
| Activation Time | < 100 milliseconds |
Note: Parameters are application-specific. Manufacturers provide detailed specifications based on LNG transfer scale (e.g., truck loading vs. marine terminal). Regular testing and replacement are mandatory for sustained safety.
(Terminology: "Breakaway Valve" is used for general clarity; "ERC" is technically precise.)