This case study describes how a National Grid LNG storage facility improved safety by replacing unreliable thermocouples with an integrated cryogenic safety transmitter for LNG leak detection in dike containment areas. Thermocouples frequently failed during winter conditions due to snow and ice buildup, creating detection gaps. The new SIL-capable device combines a cryogenic RTD, transmitter, safety relay, and logic solver into a single unit. Upon detecting an LNG leak, the system directly shuts down sump pumps and signals the DCS to activate foam suppression, reducing response time, system complexity, and risk to personnel and assets.

Join for free to read