What risk is associated with sudden temperature drop during cargo tank cool-down?
Direct Answer
Option D: Thermal shock cracking of tank metal bulkheads and pipe joints
Introducing cryogenic liquids into ambient-temperature tanks generates extreme localized thermal gradients. SIGTTO and IGC Code guidelines restrict cool-down rates to prevent severe thermal stresses, brittle fracture, and catastrophic cracking of tank bulkheads, piping, and welding seams.
All Options
Detailed Explanation & Context
Introducing cryogenic liquids into ambient-temperature tanks generates extreme localized thermal gradients. SIGTTO and IGC Code guidelines restrict cool-down rates to prevent severe thermal stresses, brittle fracture, and catastrophic cracking of tank bulkheads, piping, and welding seams.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Liquefied Gas Tanker Cargo Operations (LGTCO/LGTF).
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