Table of Contents
Why does a boiler need a fusible plug?
The function of fusible plug is to protect the boiler from damage due to overheating of boiler tubes by low water level.
What is the purpose of fusible plug?
Purpose. A fusible plug operates as a safety valve when dangerous temperatures, rather than dangerous pressures, are reached in a closed vessel. Fusible plugs are commonly installed in aircraft wheels, most typically in those of larger or high-performance aircraft.
Why the fusible plug is used in boiler explain its principle of working what should be the location of it in fire tube and water tube boilers?
Steam Boiler Fusible plug is a pressure safety valve (PSV) which defends the boiler from failure due to high pressure. Fusible plug is located on top surface of the steam boilers. The aim of a fusible plug is to shield the boiler from damage caused by low water levels overheating the boiler tubes.
What is the function of fusible plug in the boiler Mcq?
What is the function of fusible plug in the boiler? Explanation: The function of the fusible plug is to protect the fire tube from burning due to excessive heating. This usually happens when the water level inside the drum becomes too low and the shell and crown plate are directly exposed to steam space.
At what temperature do fusible plugs melt?
Fire-activated fusible plugs are filled with pure tin and feature a melting point between 445°F and 450°F.
What is the purpose of fusible plugs on an acetylene cylinder?
What is the purpose of fusible plugs on an acetylene cylinder? To provide a safety valve for excessive internal pressure to be released.
What is the excess discharge temperature of fusible plug?
Fusible plug is fitted under side of the pipe between relief valve and air bottle. It is fitted to release the compressed air in the event of abnormally high compressed air temperature. Fusible plug melt at 105 °C and release all content of air.
At what temperature does a fusible plug melt?
What is the function of fusible plug and feed check valve?
The feed check valve ensures unidirectional flow. Fusible plug: It is fitted to the firebox. Its objective is to put off the fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit and avoids the explosion which may take place due to overheating of the furnace.
Is fusible plug used in water tube boiler?
Boiler fusible plugs are classed as steam actuated or fire actuated, and can be installed on both fire tube boilers and water tube boilers. It’s also possible to classify boiler fusible plugs as being either fire side or water side plugs.