We replaced the
fusible plug in the roof of the firebox.
The team recently completed a hydraulic boiler test, in which Master replaced several gaskets in the boiler, repacked the high-pressure cylinder, refitted the
fusible plug in the firebox and reassembled the grate and ash pan.
High temperature shutdown--A temperature sensing device, often a
fusible plug, can be installed to shut-in the valve and vent pressure when a pre-set temperature limit is reached.
The Branch's examination found that a last-resort safety device, known as the
fusible plug, had activated as the train travelled to Shelley.
Almost, on all vehicles the valves used have the safeties (Burst disc &
Fusible Plug) installed in series wherein the activation of the Pressure Safety (Burst Disc) is dependent on the Thermal Safety (
Fusible Plug).
For vessels with a gross internal volume not greater than 3 [ft.sup.3] (0.085 m3), one or more pressure relief devices or a
fusible plug with at least the minimum required capacity determined from Equation 1 can be used.
One other very important part of a boiler: the
fusible plug. This is a plug filled with a metal that will melt at a comparatively low temperature.
The RAIB report says a key last resort safety device, known as the
fusible plug, had activated as the train travelled to Shelley.