During the annual inspection by the owner, each nonmetallic oil transfer hose must not burst, bulge, leak, or abnormally distort under static liquid pressure. Which defines the minimum test pressure?
• 46 CFR requirements for oil transfer hoses and testing • Definition of maximum allowable working pressure (MAWP) for hoses and piping • Relationship between test pressure and normal operating/working pressure in marine systems
• Consider which option ties the test pressure to a clearly defined design or rating value of the hose, not just a changeable operating condition. • Ask yourself: in safety testing, is the test pressure usually equal to, less than, or greater than the normal working pressure? By about how much? • Think about which pressures (relief valve setting, shoreside pump, MAWP) might vary and which are specified by the hose manufacturer or system design.
• Verify which choice is directly related to the designed pressure rating of the hose, not the equipment currently connected to it. • Check which pressures (relief valve setting, shoreside pump) can be adjusted or replaced without changing the hose’s design limits. • Confirm that regulatory hydrostatic or static tests typically use a pressure greater than normal working pressure to provide a safety margin.
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