9 Questions
What is Emergency Shutdown (ESD)?
A system of valves and buttons that immediately stops the flow of LNG from the tanks in case of an emergency.
What is the purpose of the signs above each ESD button?
To show the location of the ESD button.
Which valves are actuated by ESD at SS#1?
Those used for LNG production and vapor control.
How can ESDs be activated?
Manually or by gas and fire detectors.
What is the Boiler ESD system used for?
To shut down boilers and glycol heating systems in case of an emergency.
What do the alarms in LNG Storage Sites activate?
Visual and audible signals and send notifications to individual phone numbers.
What are some unique alarm notifications in LNG Storage Sites?
PLC not operating, UV flame detectors activated, gas detectors reaching 25% and 50% LEL, GVEA power outage, low distribution pressure, and low gas temperature.
What are the unique alarm notifications for the distribution system?
Low and high distribution pressure.
How long is the manual override for gas detector alarms during LNG tanker offloads?
60 minutes.
Study Notes
Emergency Shutdown and Alarms in LNG Storage Sites
- Emergency Shutdown (ESD) is a system of valves and buttons that immediately stops the flow of LNG from the tanks in case of an emergency.
- There are signs above each ESD button showing its location.
- The valves actuated by ESD at SS#1 and SS#2 include those used for LNG production and vapor control.
- ESDs can be activated manually or by gas and fire detectors.
- If ESD is activated, power is cut to motor actuated and electric control solenoid valves controlling the LNG tank out valves.
- Boiler ESD system is used to shut down boilers and glycol heating systems in case of an emergency.
- LNG Storage Sites have alarms that activate visual and audible signals and send notifications to individual phone numbers.
- Unique alarm notifications include PLC not operating, UV flame detectors activated, gas detectors reaching 25% and 50% LEL, GVEA power outage, low distribution pressure, and low gas temperature.
- The distribution system also has unique alarm notifications for low and high distribution pressure.
- Gas detector alarms have a 60-minute manual override for use during LNG tanker offloads.
- To clear alarms and ESD conditions and return the site to normal status, operators need to follow specific procedures depending on the storage site.
- Operators receive initial training and must be reevaluated when new procedures are incorporated or when deemed necessary, and continuing instruction is conducted at intervals not to exceed two years.
Emergency Shutdown and Alarms in LNG Storage Sites
- Emergency Shutdown (ESD) is a system of valves and buttons that immediately stops the flow of LNG from the tanks in case of an emergency.
- There are signs above each ESD button showing its location.
- The valves actuated by ESD at SS#1 and SS#2 include those used for LNG production and vapor control.
- ESDs can be activated manually or by gas and fire detectors.
- If ESD is activated, power is cut to motor actuated and electric control solenoid valves controlling the LNG tank out valves.
- Boiler ESD system is used to shut down boilers and glycol heating systems in case of an emergency.
- LNG Storage Sites have alarms that activate visual and audible signals and send notifications to individual phone numbers.
- Unique alarm notifications include PLC not operating, UV flame detectors activated, gas detectors reaching 25% and 50% LEL, GVEA power outage, low distribution pressure, and low gas temperature.
- The distribution system also has unique alarm notifications for low and high distribution pressure.
- Gas detector alarms have a 60-minute manual override for use during LNG tanker offloads.
- To clear alarms and ESD conditions and return the site to normal status, operators need to follow specific procedures depending on the storage site.
- Operators receive initial training and must be reevaluated when new procedures are incorporated or when deemed necessary, and continuing instruction is conducted at intervals not to exceed two years.
How much do you know about the emergency shutdown and alarm systems in LNG storage sites? Take this quiz to test your knowledge on the different components of ESD, the unique alarm notifications, and the procedures that operators follow to return the site to normal status. This quiz will help you learn about the importance of safety measures in the LNG industry and how they are implemented in emergency situations.
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