Short-Term High Temperature Failures

The operation of a boiler is a dynamic balance between heat flow from the combustion of a suitable fuel and either steam formation within the furnace or steam super heating within the superheater or reheater. In effect the steel tube is "heated" by the flame or hot flue gas and simultaneously "cooled" by the fluid (steam water or a mixture of ...

Learn More

Finding the Root Cause of Boiler Tube Failures

Failures result when the tube metal temperature is extremely elevated from a lack of cooling steam or water flow. A typical example is when superheater tubes have not cleared of condensation during boiler start-up obstructing steam flow. Tube metal temperatures reach combustion gas temperatures of 1600F (870C) or greater which lead to tube failure.

Learn More

Failure analysis of bank front boiler tubes

The hostile environment is the source of corrosion and stress which leads to the failure of boiler tube. The failure of boiler tubes appears in the form of bending bulging cracking wearing or...

Learn More

An overview of problems and solutions for components ...

Dec 21 2017 · In engineering applications there are various types of boilers such as water tube boilers fire tube boilers packaged boiler fluidized bed combustion boiler pulverized fuel boiler and waste heat boilers. These boilers are used in different industries such as power plants paper and chemical. The present paper reports various problems (such as agglomeration slagging fouling caustic ...

Learn More

Six Causes of Heat Exchanger Tube Failure

Six Causes of Heat Exchanger Tube Failure 1. Tube Corrosion. The biggest threat to shell and tube heat exchangers that use carbon steel tubes is oxidation (corrosion) of the heat transfer surface of its tubes. The reaction between oxygen (O 2) and iron (Fe 2 Fe 3) is

Learn More

Tube Failures in High Pressure Boilers - Bright Hub ...

Erosion. Fire side corrosion (Called also as High temperature Corrosion) Lack of quality control. These lead to twenty-two primary causes that can cause a tube failure in a high pressure boiler: Short term overheating failure. Long term overheating failure (called

Learn More

Tube Failures in High Pressure Boilers - Bright Hub ...

There are twenty-two primary reasons for tube failures in a boiler which can be classified under six major groups. They can be analyzed and corrective and preventive action can taken. Good operating and maintenance practice reduces tube failures. Tube failures during the initial operation period the normal operation period and after ten to fifteen years operation show different trends.

Learn More

Common Boiler Problems Part 1: Low Water Conditions

Jan 14 2019 · The only thing that allows a boiler to withstand these furnace temperatures is the presence of water in or around (depending on whether the boiler is a fire tube or a water tube design) the pressure parts at all times that a fire is present. Low water conditions will literally melt the steel

Learn More

Failure analysis of primary waste heat boiler tube in ...

The primary WHB outer tube failure might occur due to the lack of cooling from boiler water because of cap leakage combined with a thick Fe 3 O 4 scale deposit on the nail spacer that causes significant local temperature increases on the failed tube which resulted in yielding and thin-lip rupture.

Learn More

Cause of Boiler Tube Failures - Chicago Tube & Iron

During periodic shutdowns of the boiler unit tube failures can occur. Quite often they are related to dew point corrosion an insidious condition that can penetrate up to 0.50 of steel per year. Thin walled tubes that normally last 10 years can become badly pitted during shutdown and replacement tubing becomes an unanticipated expense.

Learn More

Boiler Economizer Tube Failure - CR4 Discussion Thread

Aug 01 2013 · Boiler Type: Water Tube. Boiler Capacity: 10 Tons/Hr. Economizer Tubes Material: A-106 B. Economizer Flue Inlet Temp: 250 C Economizer Flue Exit Temp: 180 C Economizer Water Inlet Temp: 101 C. Economizer Water Outlet Temp: 140 C. Fuel Type: Dual Fuel (Primary: Natural Gas Secondary: Furnace Oil)

Learn More

Fouling formation and under deposit corrosion of boiler ...

Feb 01 2021 · Two industrial seawater steam boilers were selected and their features were assessed in the experiments. The information for the boilers was presented in Table 1.The boiler pressures were fixed in the range of 200205 psi and the produced steam was used to produce potable water. The boilers have been installed in offshore regions to produce low pressure steam from seawater without

Learn More

Short-Term High Temperature Failures

The operation of a boiler is a dynamic balance between heat flow from the combustion of a suitable fuel and either steam formation within the furnace or steam super heating within the superheater or reheater. In effect the steel tube is "heated" by the flame or hot flue gas and simultaneously "cooled" by the fluid (steam water or a mixture of ...

Learn More

Underdeposit corrosion in boiler applications (Journal ...

Stress assisted corrosion (SAC) of carbon steel boiler tubes is one of the major causes of waterside failure in industrial boilers. SAC is a major concern for kraft recovery boilers in the pulp and paper industry as any water leak into the furnace can cause a smelt-water explosion in the boiler.

Learn More

Boiler Economizer Tube Failure - CR4 Discussion Thread

Aug 01 2013 · Boiler Type: Water Tube. Boiler Capacity: 10 Tons/Hr. Economizer Tubes Material: A-106 B. Economizer Flue Inlet Temp: 250 C Economizer Flue Exit Temp: 180 C Economizer Water Inlet Temp: 101 C. Economizer Water Outlet Temp: 140 C. Fuel Type: Dual Fuel (Primary: Natural Gas Secondary: Furnace Oil)

Learn More

(PDF) Carburization processes involved in boiler-tube failures

The diffusional flow of carbon into the surface of the steel tube exposed to the combustion environment is enhanced by the following: (i) Catalytic agents present in the fuel oil-ash deposits.

Learn More

Cause of Boiler Tube Failures - Chicago Tube & Iron

During periodic shutdowns of the boiler unit tube failures can occur. Quite often they are related to dew point corrosion an insidious condition that can penetrate up to 0.50 of steel per year. Thin walled tubes that normally last 10 years can become badly pitted during shutdown and replacement tubing becomes an unanticipated expense.

Learn More

21 Types of Pipe Corrosion & Failure

Documented Examples of Pipe Corrosion and Failure. CorrView International LLC offers a series of photo galleries taken from 18 years of past ultrasonic piping investigations which address the above and additional corrosion conditions. A review of the different types of corrosion is often helpful in initially determining the likely corrosion cause.

Learn More

Caustic Corrosion - an overview | ScienceDirect Topics

Feb 10 2011 · Hydrogen embrittlement: This is a most common type of failure affected by the combined outcome of excessive deposition on inside tube surfaces and the boiler feedwater that has a low pH value. Digression of water chemistry or acidic contaminantsthat is low pHresulted from for example leakage of the condenser particularly with a salt water cooling medium; this may cause further

Learn More