Failure analysis of bank front boiler tubes

Khajavi, Mohammad; Abdolmaleki, A. R.; Adibi, N.; Mirfendereski, Seyed Mojtaba

doi:10.1016/j.engfailanal.2005.10.017

Cited by 42 publications

(8 citation statements)

References 2 publications

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“…The molar ratio of alkali metal to phosphate is also an important parameter for controlling the phosphate treatment program [6,7,13]. According to the phosphateepH relationship recommended by standard BS EN 2486 to control the corrosion in a high pressure industrial boiler, the pH and phosphate concentration should be maintained at levels which correspond to sodium to phosphate molar ratio of 2.8:1 to 2.2:1.…”

Section: Steam Drum Water Analysismentioning

confidence: 99%

“…One of the important considerations in phosphate injection program is the accurate and continuous control of pH and the concentrations of phosphate and alkali elements in the boiler water. Deviation of the abovementioned parameters from the optimum range may result in alkalization or acidification of the boiler water; hence, acid phosphate corrosion or caustic corrosion in the steam generation system particularly in the steam pipes [6,7,11,13].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion failure of superheat steam pipes of an ammonia production plant

Sabouri¹,

Hoseiny²,

Faridi

2015

Vacuum

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Section: Steam Drum Water Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corrosion failure of superheat steam pipes of an ammonia production plant

Sabouri¹,

Hoseiny²,

Faridi

2015

Vacuum

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“…Tube side failures are mostly attributed to corrosion or brittleness caused by operational mishandling or manufacturing . Disturbed water chemistry has also been reported to trigger such incidents because of scaling which causes localized overheating . Localized overheating can also be caused by the outer layer deposits and dry running of the tubes .…”

Section: Introductionmentioning

confidence: 99%

Comprehensive dynamic modeling, simulation, and validation for an industrial boiler incident investigation

Taimoor

Alghamdi

Farooqi

et al. 2019

Process Safety Progress

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Industrial boilers simulation can serve number of purposes like training, optimization, HAZOP studies, and incident investigation. Simulation including trip logics, interlockings, safety devices, start‐up and shutdown procedure is presented in this work. Simulation is directly accomplished in dynamic mode to benefit from the holdup approach to avoid anomalies because of recycling. The industrial DCS/PLC diagrams are replicated to imitate the boiler‐integrated behavior. Trip logics, start‐up and shutdown procedures are programmed using event scheduler. The inbuilt pressure relief module validates the simulated PSVs and rupture disc capacities. The model is then verified at three stages including ‘steady state’ achievement in dynamic mode, controller validation by start‐up and shut down procedures and finally by direct industrial data under deviant conditions. Where an unfortunate event is a concern, it also provides an opportunity to ponder and to evolve at various levels. Operational simulation of any such incident may help in getting a deep insight and thus to take accurate countermeasures. One such attempt is done in this work. A boiler accident has been reported. The complete response of the controllers and interlockings/trip system is imitated. The obtained results were compared with the chain of events that took place. © 2019 American Institute of Chemical Engineers Process Saf Prog: e12040 2019

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“…It's basically a drum filled with water and equipped with a heating mechanism on the inside bottom and/or top part. There are a few literatures that discuss various aspects of heating and maintenance including failure analysis of hot water heaters/boilers [1][2][3][4][5]. A schematic sketch of a domestic hot water heater/boiler is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Failure analysis of domestic hot water heating elements

Sudhakar¹

2013

IENGJ

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Domestic electric heating elements that failed after a few years of use but before their expected service life were received for failure analysis. The investigation mainly involved visual examination and SEM studies including EDX (Energy-Dispersive X-ray analysis). From the background information and the SEM investigation revealed that the premature failure was mainly due to the general type of corrosion (resulting in short-circuiting) the heater elements as a result of the formation of magnesium and calcium based salts over a period time.

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Failure analysis of bank front boiler tubes

Cited by 42 publications

References 2 publications

Corrosion failure of superheat steam pipes of an ammonia production plant

Corrosion failure of superheat steam pipes of an ammonia production plant

Comprehensive dynamic modeling, simulation, and validation for an industrial boiler incident investigation

Failure analysis of domestic hot water heating elements

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