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In a fire tube boiler, the water surrounds a set of tubes through which the fire and the products of combustion travel (as opposed to a water tube boiler, in which the water travels through the tubes, and the fire surrounds the tubes).The HVAC Veteran
The words are literal , a water tube boiler is water inside the tubes with hot gases surrounding them and a fire tube boiler are got gases within the tubes with water surrounding them.
The answer is in the name. Boilers are made with a "tube - in - shell" construction, and the name implies what is in the tube. In a water tube boiler, the water circulates through the tubes, and the burner is usually under them. Most of the time, the "shell" of this style of boiler would not be watertight. A fire tube boiler has a watertight outer jacket with tubes through the center of it. The flame is shot through the tubes.
there are two types of boilers water tube and fire tube. fire tube boilers are divided in to two categories vertical and horizontal. this according to the construction of fire tubes. it is said that vertical boilers are inefficient than horizontal boilers. The vertical boiler is small capacity, and horizontal boiler is higher capacity, well, the horizontal boiler have many types according the drums, there are single drums boiler, and double drums boiler, while, the single drums boiler have fire tube boiler and water and fire tube boiler, double drums boiler is usually water tube boiler.
Water tube boilers are used in marine and stationary applications. A water tube boiler heats by water flowing through tubes and being heated by fire externally.
The ligament is the section of metal between the holes in a tube sheet. A tube sheet is a portion of a boiler drum, or header perforated for the insertion of tubes. The tubes may be fire tubes (carries fire through water) or water tube (filled with water, surrounded by fire). That arrangement of tubes, with their retaining sheets, forms a more efficient means of transferring heat to water, and making more steam. It was also a stronger design, permitting operation at higher pressures than before.
3.14*3*20*12= 2260.8 sq inthe heating surface of a fire tube boiler is determined by adding all of the surface of the tubes that have hot water on one side and/or fire or gases of combustion on the other, including the super heater and economizer.
fire tubes or water tubes
water
the advantage is the design is complicated
The Cornish Boiler only has one fire tube compared to the Lancashire Boiler's two.
Fire tube and water tube. Steam Boiler and Water Boiler.