Airlock – Definition and Pronunciation
What is Airlock?
Airlock is a separation area used to maintain adjacent areas at a pressure differential. For example, the airlock to an electric motor room on a gas carrier is used to maintain pressure segregation between a gas- dangerous zone on the open deck and the gas-safe motor room which is pressurized.
Examples of Airlock
Electrical equipment which is not of the certified safe type for manoeuvring, anchoring and mooring equipment as well as the emergency fire pumps should not be located in spaces to be protected by airlocks.
From “Philosophy and general requirements in the gas industry”.
Engine room ventilation fans are high above the deck to prevent cargo gases entering these spaces and intakes are fitted with closing devices. Some doors may be fitted with airlocks and, if so, it is essential that these are used correctly.
From “Sources of ignition on ships carrying LNG/LPG”.
An airlock entrance fitted to the electric motor room from the ship’s deck, which is required by the IGC Code to consist of two gas-tight doors at least 1,5 metres apart (but not more than 2,5 metres apart), is intended to prevent loss of air pressure upon entry into the motor room.
From “Liquefied Gas Carrier Types”.
Pronunciation of Airlock
