Emergency Shut-Down (ESD) System – Definition and Pronunciation
What is ESD?
ESD (Emergency Shut-Down) is a logic system which controls either ship or shore ESD valves. For example on a ship discharging it may be programmed to stop the pump. Equally, at a terminal, it may be programmed to shut ESD and tank valves.
Examples of ESD
These drawbacks have led to the development of electronic ESD systems with fibreoptic or various intrinsically-safe electric systems providing the ship/shore link. However, despite its disadvantages, having a pneumatic link is better than having no ESD link at all.
From “Linked ESD Systems at Both LNG and LPG Terminals”.
Source: Emergency Shutdown System (ESDS) on Liquefied Gas Carriers
Although, in LPG ships, it is not usual to distinguish between ESD functions concerned with loading or unloading from those associated with other operations, LNG carrier designs commonly do so and this diagram is intended to show how the functions relate to one another.
From “ESD Functions and Associated Safety Systems”.
Pronunciation of ESD
