🔍 Key Concepts

• 46 CFR requirements for boiler fittings and accessories • Differences between main boilers and auxiliary boilers in terms of pressure limits • Typical pressure limits for tubular type water gage glasses

💭 Think About

• Consider why the Coast Guard might restrict tubular gage glasses to lower pressures • Think about the relative safety and strength of tubular glasses versus more robust water level indicators • Compare the usual operating pressures of auxiliary boilers with the safe pressure range for tubular gage glasses

✅ Before You Answer

• Verify the specific 46 CFR section that addresses water gage glasses on auxiliary boilers • Check the maximum allowable working pressure mentioned there for tubular type glasses • Make sure you are not confusing requirements for main propulsion boilers with those for auxiliary boilers