May 05, 2017· Water Tube Boiler: * Water circulates in tubes and heated externally by hot gases. Fuel is burned inside the furnace. i.e (hot gases- outside the tubes and water- inside the tubes). * Operating pressure = upto 100 bar * Efficiency = upto 90% * Ste
Jun 05, 2018· Comparison between Fire Tube and Water Tube Boiler can be done in 14 aspects. Those aspects are operating pressure, passage of material type in tubes, rate of steam generation, handling of load fluctuation, floor area requirement, efficiency, operator skills, design, maintenance cost are listed below in the tabular form.
What causes air tube burn-off? Can it be prevented? These questions occasionally arise. First, let us see if we can understand exactly why this happens. The air tube is fabricated from cold-rolled steel, which has a maximum operating temperature range of 1000°F. This has proven adequate over the yea
Aug 01, 2007· RE: water tube boiler tube leak that cannot be found unclesyd (Materials) 26 Jun 07 19:40 We have "D" tube boilers (7), actually vaporizers for a thermal heating fluid that developed leaks that had very similar behavior as your problem.
A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or (many) more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.. The fire-tube boiler developed as the third of the four major historical types of boilers: low
different forms in fire-tube and water-tube boilers. From Table 1 it can be seen to be the second most common cause of failure in the sample of fire tube boilers. As reported by Yates (1999) somewhere between 8% and 12% of fire tube boilers in the UK have been found to be affected. The
A high pressure watertube boiler (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which heats water in the steam-generating tubes.In smaller boilers, additional generating tubes are separate in the furnace, while larger utility boilers rely on the water-filled tubes
Jul 30, 2017· Boiler tubes are exposed to water side and gas side, but we must also be aware that the reasons for leakage varies from water tube boiler to smoke tube boiler. The below mentioned will be common to both type of boilers. Now, lets consider the wate
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May 22, 2015· Such fires do, however, occur in finned tube exhaust gas heat exchangers and boiler economisers, where the source of heat is flue gas with a temperature much too perchance during a soot fire; the unit concerned is not being circulated, the intense heat of the soot fire, rich in carbon, may initiate a hydrogen fire and that this, as in the case
Cracking in fire-tube boilers at welded joints is a frequent, costly and potentially dangerous occurrence. The shortest recorded time for serious cracking to leak is 3 years, representing less than 20,000 cycles, and occurred on a laundry boiler subjected to frequent and rapid firing.
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Fire Tube Boiler: Fire tube or “fire in tube” boilers; contain long steel tubes through which the hot gasses from a furnace pass and around which the water to be converted to steam circulates. (Refer Figure 2.2). Fire tube boilers, typically have a lower initial cost, are more fuel efficient
Dec 07, 2016· Unlike fire tube boiler, where the hot gas is circulated through tubes to heat water in a tank, water tube boilers involve running water through tubes surrounded by a heated tank. These types of boiler are generally considered safer than fire tube designs …
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Boiler Tubes are metal tubes located inside of boilers that heat water in order to produce steam. There are two major types of tube boilers: water-tube boilers and fire-tube boilers. In water-tube boilers, water circulates inside the tubes and is heated externally by hot gases generated by the furnace.