Boiler Flue Temperature, creep life assessment of usc boiler tubes

JC-15D Flue Gas Temperature Monitor

The JC-15D Flue Gas Temperature Monitor is a microprocessor based indicating instrument with a heavy duty Thermocouple Assembly. Flue gas temperature is continuously displayed using a highly visible backlit LCD display. An intuitive bar graph display and alarm messages provide clear stack temperature status.

What is the temperature of a flue pipe on a large

1/19/2009 · Best Answer: The type and size of any heat recovery equipment that uses the flue gases can actually set the outlet temperature. This typically is independent of the fuel type. You can use the flue gases to preheat the combustion air or the boiler feed …

Is a high efficiency, condensing gas boiler the best

8/13/2018 · The word “condensing” refers to the fact that these appliances are able to extract heat from the combustion process so efficiently that the flue gases leaving the boiler are at a much lower temperature than in a conventional boiler. The temperature of these flue gases is low enough that they actually condense inside the heat exchanger.

Flue gas system

Part of the flue gases is possible fed back to the furnace for temperature control in furnace and to have better heat transfer in the convection part of the boiler by increasing the flue gas flow. 2 DESIGN DATA Flue gas ducts are made of steel plate with a thickness of 4.0 mm: - duct from the boiler to the De SOx

Condensing vs. Non-Condensing Boilers: What's the Difference

Electrical: where electricity is the main energy source to heat the water, eliminating the need for combustion components inside the boiler or flue stacks to vent harmful exhaust. The one major factor of non-condensing boilers is that it should not condense the flue gases or have the condensate reach the pressure vessel to cause corrosion.

DD-Jet™ Boiler Cleaning

The impact of the water on the hot surfaces causes the water to turn into steam. The water to steam expansion provides a pressure wave that is highly efficient to remove the fouling from the fly ash on the boiler surface. The DD-JET system reduces the flue gas temperature at boiler outlet typically by 60 °C.

Is PVC an acceptable vent material for flue gases?

A temperature sensor or probe with a high-limit control could be inserted into the flue at the flue connection to the boiler or water heater. This control would shut off the burner if the flue gas temperature exceeds the temperature rating of the flue pipe. A standard will be needed for plastic flue pipes that should include a temperature gauge ...

How Hot Should a Flue Pipe Get for an Oil Furnace?

The temperature in the flue pipe of your furnace can run as high as 400 degrees Celsius, which is about 750 degrees Fahrenheit. This temperature is an indication that your furnace is not running at maximum efficiency and you are losing heat up the chimney. Your furnace may have a flue pipe ...

Boiler Fan Fault Problems And Cures

The fan on your boiler, from a safety perspective, is one of the most important components. It doesn’t act like a fan on other machinery, such as cars (i.e. cooling the car’s engine down). Instead, the fan on a boiler helps to drive harmful gases out of the flue. Without the …

What is the gas temperature coming out from the high

The rated flue gas exit temperature at the air pre-heater outlet is around 135 deg Celsius in a typical sub-critical boiler. The flue gas temperature should always be maintained preferably within 120 to 150 deg Celsius. If it goes beyond 150 deg C...

What temperature should a condensing boiler be set at

The maximum temperature that we recommend you set your radiator output to is 80 °C. If you have a conventional boiler system, your water cylinder will have its own thermostat. This is usually fitted on the side of the tank. You should set the temperature between 60 and 65 °C but for maximum efficiency, it should be set to around 60 °C.

F01 Fault Code

HTP: Fault Code F01: FLUE TEMP/WAT LV F01: This display indicates that the flue temperature limit switch of the boiler has tripped or that the water level in the boiler is low (this will only ...

What is the thermal efficiency of gas fired steam boilers

What is the thermal efficiency of a gas fired boiler?

Explaining Boiler Flue Regulations

Temperature. The harmful gases are produced when the boiler is burning fuel, which means that the gas exiting through the flue is hot, so this needs to be taken into account when positioning the flue. Keeping it away from any plastic gutters as they could end up melting is one of the considerations to be made here. ... A boiler flue that meets ...

Condensing boiler

Doing so would reduce fuel consumption considerably, but would quickly destroy any mild steel or cast-iron components of a conventional high-temperature boiler due to the corrosive nature of the condensate. For this reason, most condensing boiler heat-exchangers are made from stainless steel or aluminum/silicon alloy.

PDF Flue Gas Temperature Sensor

Flue Gas Temperature Switch Installation For more details refer to the Installation and Service Instructions applicable to this boiler. Note: The flue gas temperature sensor is located on the flue gas collector. 1. Remove the screws, the cable strap and connector cover from the flue gas collector and set aside. 2.

Boiler Efficiency Improvement & Heat Loss Explained in

Dry Flue Gas Losses. This account for major heat losses amongst all. If the flue gases leaving the boiler is at a high temperature than the temperature for which it is designed, then most of the heat is getting wasted leading to reduced boiler efficiency. Heat Loss Due to Moisture in Fuel

Consider Installing a Condensing Economizer

A conventional feedwater economizer reduces steam boiler fuel requirements by transferring heat from the flue gas to the boiler feedwater. For natural gas-fired boilers, the lowest temperature to which flue gas can be cooled is about 250°F to prevent condensation and possible stack or stack liner corrosion.


A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil.The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation

Fuels Exhaust Temperatures

Exhaust Temperature (o F) (o C) Chemical Oxidation: 1350 - 1475: 730 - 800: Annealing furnace: 1100 - 1200: 590 - 650: Fluidized-bed combustion: 1600 - 1800: 870 - 980: Natural-gas fired heating appliance with draft hood: 360: 182: Liquefied-petroleum gas-fired heating appliance with draft hood: 360: 182: Gas-fired heating appliance, no draft hood: 460: 238: Glass melting furnace

How can i calculate the Temperature of the Flue Gases

How can i calculate the Temperature of the Flue Gases emitted from a Furnace for a specified Fuel to Air Ratio.? ... I have a boiler operating at 5bar and produces saturated steam.

How can i calculate the Temperature of the Flue Gases emitted

How can i calculate the Temperature of the Flue Gases emitted from a Furnace for a specified Fuel to Air Ratio.? ... I have a boiler operating at 5bar and produces saturated steam. From steam ...

Boiler Operations & Boiler Maintenance

For high overall boiler efficiency, the heat released by combustion must be efficiently transferred into the working fluid. Any heat not transferred into the fluid will be lost through the boiler shell or the flue gas. The temperature of the flue gasses in the boiler stack is a good indicator of this heat transfer and thus the efficiency.

What is the Most Efficient Temperature to Keep the Boiler At?

Reading this article will help you to understand what temperature is the right one for your boiler. You can reduce your home heating cost by setting the right temperature. Find out more about central heating system by getting a new boiler quote.


Dry flue gases losses are typically 4% or greater depending on exit flue gas temperature. This loss is caused by the heat carried out by hot nitrogen, carbon dioxide, sulfur oxide and excess oxygen. The amount of energy wasted by dry flue gases depends on the amount of excess air used for combustion and the final boiler exhaust temperature [1].

Back to Basics: Venting for Gas-Fired Boilers | 2003-06-04

As the efficiency of a boiler goes up, the temperature of the flue gases go down, and the gases are more likely to condense in the flue. When combustion efficiency exceeds approximately 83%, there is a good possibility that the flue products will condense.

Gas Condensing Water Heaters

Gas Condensing water heaters and economizers operate in cooler environments where the flue gasses may be under 200 degrees it is possible to recover latent heat from the gasses. When the gas temperature is lowered into the condensing range a portion of the water in the flue gas is condensed back into a liquid.

Best Practices for Condensing Boilers - Cleaver-Brooks

temperature are also candidates for condensing boiler systems since the hot water return temperature directly relates to boiler efficiency. An example of a high ΔT system would be designing at a typical hot water sup-ply temperature of 180°F (82°C), however, instead of using a 20°F (11°C) temperature differential between

Replacing temperature sensor on boiler, by myself — Digital Spy

My boiler stopped making hot water yesterday. From following the fault guide in the engineers manual it appears to be a fault with the temperature sensor.

Inlet Water Temperatures and Boiler Corrosion

If the minimum inlet temperature to the boiler or water heater is maintained above the minimum dewpoint temperature, condensate is controllable. It is virtually impossible to cool the flue products to dewpoint when the minimum inlet water temperatures are maintained above the dewpoint temperature based on this data.

Flue Gas - an overview

The flue gas temperature, pressure and composition from pre-combustion source facility differs from that of post combustion source in a way the CO 2 is captured at the capture plant. Pre combustion CO 2 capture often employs the physical solvent which on multiple recovery stages produces CO 2 streams at

What's the best temperature for a condensing boiler to be

With a traditional boiler, fuel is burned to heat your water but a large portion of this is lost out of the flue. With a condensing boiler, there’s a secondary heat exchanger, which is designed ...

Flue Gas Analysis Table

Flue Gas Analysis Table Introduction. See Flue Gas Analysis. Operation. Using a Flue Gas Analyzer or any meter designed to measure oxygen or carbon-monoxide, and taking the flue gas temperature and the temperature of the combustion air, the following Table can be used to determine combustion efficiency when operating on natural gas.