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The water level of these boilers was around 3/4 of the height of the tube tiers, [3] so that the upper tubes were filled with steam rather than water. Above the tube banks a single flat spiral tube was used as an economiser or feedwater heater. [2] The furnace used to fire these large boilers was annular, often with four or more separate firedoors.
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bundled-tube water-tube boiler; early large-tube water-tube boilers where the tubes were grouped into bundles (of 19, for geometrical reasons) that shared a common header, so as to improve shared access for tube cleaning. [14] Butterley boiler: a form of Cornish boiler where the furnace was opened up into a "whistle mouth", enlarging the grate ...
The very large thermal loads imposed by abnormal landing and braking conditions (such as a high-speed rejected takeoff, where an aircraft heavy with fuel must brake hard from a very high speed to a stop in a relatively short distance) can cause the already high pressure in the tyres to rise to the point that the tyre might burst, so fusible ...
In order for these boilers to operate properly, they require a long warm-up process, and are prone to thermal shock of the boiler. These boilers can be rated up to 500,000 lb/hr. [2] The wall membrane of the boiler are dual welded, (welded on either side of the wall membrane) to provide extra reinforcement for high loads.
Spaghetti spoon — have large tines for ladling cooked spaghetti and sometimes a hole in the middle to measure uncooked spaghetti. [1] Straw spoon—the curved spoon end of a straw, typically used for eating the remains of ice-blended drinks; Stirrer — utensil with a long stem and usually a spoon end for mixing drinks