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ISGEC | Waste Heat Recovery Boiler Manufacturers | PH boilers | AQC boilers

When water is converted to steam it expands to over 1, times its original volume and travels down steam pipes at over kilometres per hour.

Aqx iron boiled corrode far more slowly than their modern-day steel counterparts, and are less susceptible to localized pitting and stress-corrosion. Natural draught through the use of a chimney is a type of induced draught; mechanical draught can be induced, forced or balanced. Saturated steam is useful for many purposes, such as cookingheating and sanitationbut is not desirable when steam is expected to convey energy to machinery, such as a ship’s propulsion system or the “motion” of a steam locomotive.

Special methods of coupling steam pipes together are used to prevent leaks, with very high pressure systems employing welded joints to avoided leakage problems with threaded or gasketed connections. Some are a combination of the two types. Cast iron may be used for the heating vessel of domestic water heaters. American Society of Mechanical Engineers: There are two types of mechanical induced draught.

As the resulting ” dry steam ” is much hotter than needed to stay in the vaporous state it will not contain any significant unevaporated water.


Electric steam boilers use resistance- or immersion-type heating elements.

Low Pressure Boilers 4th ed. This is more common with larger boilers where the flue gases have to travel a long distance through many boiler passes. The first is through use of a steam jet.

AQC & SP Boilers

Tube tool Boiler feed water deaerator Dealkalization of water Electric water boiler for drinking water Heat-only boiler station Hot water reset Internally rifled boiler tubes also known as Serve tubes Lancashire boiler List of boiler types Outdoor wood-fired boiler Natural circulation boiler. Dampers are used to control the quantity of air admitted to the furnace. In all cases the combustion product waste gases are boilwr from the working fluid of the steam cycle, making these systems examples of External combustion engines.

Most modern boilers depend on mechanical draught boler than natural draught. Forced draught furnaces usually have a positive pressure. All these factors make proper draught hard to attain and therefore make mechanical draught equipment much more reliable and economical. This document also contains a list of day-by-day boiler accidents and accident summaries by year, and discussions of boiler damage claims. From Wikipedia, the free encyclopedia. Extremely large boilers providing hundreds of horsepower to operate factories can potentially demolish entire buildings.

The fluid at that point may be a mix of steam and liquid droplets as it passes into the condenser. The Hartford Loop was invented in by the Hartford Steam Boiler Inspection and Insurance Company as a method to help prevent this condition from occurring, and thereby reduce their insurance claims.

This method was common on steam driven locomotives which could not have tall chimneys.

The AQC boiler with settling chamber

Wikimedia Commons has media related to Boilers. In a nuclear power plant, boilers called steam generators are heated by the heat produced by nuclear fission.


The steam jet oriented in the direction of flue gas flow goiler flue gases into the stack and allows for a greater flue gas velocity increasing the overall draught in the furnace. To give the reader some perspective, the steam plants used in many U. Navy destroyers built during World War II operated at pounds per square inch 4, kilopascals pressure and degrees Fahrenheit degrees Celsius superheat.

In the event of a major rupture of the system, an ever-present hazard in a warship during combatthe enormous energy voiler of escaping superheated steam, expanding to more than times its confined volume, would be equivalent to a cataclysmic explosion, whose effects would be exacerbated by the steam release occurring in a confined space, such as a ship’s engine room. Some superheaters are radiant type, which as the name suggests, they absorb heat by radiation.

However, the overall energy efficiency of the steam plant the combination of boiler, superheater, piping and machinery generally will be improved enough to more than offset the increased fuel consumption. Thin and brittle metal shells can rupture, while poorly welded or riveted seams could open up, leading to a violent eruption of the pressurized steam. Early boilers provided this stream of air, or draughtthrough the natural action of convection in a chimney connected to the exhaust of the combustion chamber.

By using this site, you agree to the Terms of Use and Privacy Policy. That makes the longevity of older wrought-iron boilers far superior to that of welded steel boilers.