天然气低温高压紧急切断阀

天然气低温高压紧急切断阀

天然气低温高压紧急切断阀是专为液化天然气（LNG）等低温高压工况设计的安全联锁保护装置。它集低温适应性、高压耐受性和紧急切断功能于一体，是LNG产业链中确保系统安全的关键设备。该阀门在接收到紧急信号（如火灾、泄漏、压力异常）时，能在极短时间内完全切断管路，阻止低温高压天然气继续流动，从而隔离危险源，防止事故扩大。

天然气低温高压紧急切断阀核心特点：

低温高压兼容设计：采用深冷处理奥氏体不锈钢（如316L）和高压阀体结构，同时满足-196℃超低温及Class 600以上高压工况要求

毫秒级快速响应：通过弹簧蓄能或液压加速机构实现 ultra-fast shutdown，典型关闭时间≤2秒

天然气低温高压紧急切断阀三重安全机制：

电气控制：与ESD系统联锁

气动/液压驱动：足以动力稳定性

机械蓄能：失电失压时自动触发

零泄漏密封：采用金属密封+软密封复合结构，达到API 598零泄漏标准

智能状态监测：配备阀位传感器、行程指示和远程诊断接口

防火认证：通过API 607/API 6FA防火测试

天然气低温高压紧急切断阀典型应用：

LNG接收站高压输出管道

LNG罐车装卸系统

浮式储存再气化装置（FSRU）

LNG加注站高压管线

液化工厂出口紧急隔离

Product Overview of Natural Gas Cryogenic High-Pressure Emergency Shutdown Valves

Natural Gas Cryogenic High-Pressure Emergency Shutdown Valves are safety interlocking protection devices specifically designed for cryogenic high-pressure applications such as Liquefied Natural Gas (LNG) systems. Integrating cryogenic adaptability, high-pressure resistance,  emergency shutdown functionality, these valves are critical components for ensuring safety in the LNG industry chain. Upon receiving emergency signals (e.g., fire, leakage, abnormal pressure), they can completely shut down the pipeline within milliseconds, stopping the flow of cryogenic high-pressure natural gas to isolate hazard sources  prevent incident escalation.

Key Features:

Cryogenic-High Pressure Design: Utilizes deep-cryo treated austenitic stainless steel (e.g., 316L)  high-pressure body structures, meeting both ultra-low temperature (-196℃)  high-pressure (Class 600+) requirements

Millisecond Response: Achieves ultra-fast shutdown through spring-loaded  hydraulic acceleration mechanisms, with typical closing time ≤2 seconds

Triple Safety Mechanism:

Electrical control: Interlocked with ESD systems

Pneumatic/hydraulic actuation: Ensures power reliability

Mechanical energy storage: Automatic triggering upon power/pressure loss

Zero-Leakage Sealing: Combined metal+soft seal structure meeting API 598 zero-leakage standards

Smart Condition Monitoring: Equipped with valve position sensors, stroke indicators,  remote diagnostic interfaces

Fire-Safe Certified: Complies with API 607/API 6FA fire safety standards

Typical Applications:

LNG terminal high-pressure output pipelines

LNG tanker loading/unloading systems

Floating Storage Regasification Units (FSRU)

LNG fueling station high-pressure lines

Liquefaction plant emergency isolation

Technical Standards Compliance:

Design: API 598, BS 6364

Pressure: ASME B16.34

Fire Safety: API 607/API 6FA

Cryogenic: BS EN 12567