What safety valve opens automatically if cargo tank pressure drops below atmospheric limits?
Direct Answer
Option D: Vacuum relief valve
Vacuum relief valves are essential safety devices designed to protect cargo tanks from structural collapse when internal pressure drops below atmospheric limits. These valves automatically admit inert gas or air to equalize pressure, a critical requirement under the IGC Code for all independent and membrane cargo tanks.
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Detailed Explanation & Context
Vacuum relief valves are essential safety devices designed to protect cargo tanks from structural collapse when internal pressure drops below atmospheric limits. These valves automatically admit inert gas or air to equalize pressure, a critical requirement under the IGC Code for all independent and membrane cargo tanks.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Liquefied Gas Tanker Cargo Operations (GASCO).
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