🔍 Key Concepts

• 46 CFR requirements for fuel oil systems serving boilers • Differences between duplex, self-cleaning, and bypass-fitted strainers • Regulatory intent: maintaining fuel flow while allowing safe maintenance and cleaning

💭 Think About

• Ask yourself which options allow the fuel supply to the boiler to continue safely while the strainer is being cleaned or serviced. • Consider whether regulations are usually written to allow only one specific design, or to allow multiple designs that meet the same safety goal. • Think about which of the listed strainer types provide redundancy or continuous filtration during maintenance.

✅ Before You Answer

• Verify in 46 CFR whether interruption of fuel supply during strainer cleaning is acceptable for an auxiliary boiler. • Check if the regulation specifies one required type of strainer or if it permits equivalent arrangements. • Confirm which of the listed strainer types provide a means for cleaning without shutting down the fuel supply.