On an international voyage, a cargo vessel of 1,000 GT or more operating two fire pumps simultaneously is required to have a minimum pitot tube pressure from the two highest outlets. What is the minimum required pressure?
• SOLAS fire protection requirements for cargo ships • Relationship between fire main pressure and effective firefighting stream height • Typical minimum fire main pressure standards for large seagoing vessels
• Think about how much pressure is needed at the highest hydrants to produce an effective firefighting jet on a large cargo ship. • Compare the answer choices to what you would expect as a realistic continuous pressure from fire pumps supplying multiple hoses at once. • Consider which value aligns with international standards for fire main systems on cargo ships, rather than small-boat or domestic standards.
• Verify what SOLAS II-2 (Construction – Fire protection, fire detection and fire extinction) requires for fire pump and fire main performance on cargo ships of 1,000 GT or more. • Check that the pressure is specified as a minimum pitot tube pressure at the two highest hydrants when two jets are being supplied simultaneously. • Confirm that the value must be high enough to maintain effective jet range but not unrealistically high for shipboard fire pumps.
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