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ESTIMATION OF FAILURE TEMPERATURE IN THE RISER TUBES OF BOILER FURNACES | ||
| Basrah Journal for Engineering Science | ||
| Article 9, Volume 6, Issue 1, 2006, Pages 102-109 PDF (0 K) | ||
| Author | ||
| Haider .M. Mohammed | ||
| Abstract | ||
| In this research, the temperature of failure and surface temperature was determined using theoretical and experimental works. Stress rupture occurs due to overheating, thick layer of deposits in water-side, and erosion in the fire-side were studied. The mechanical properties such as yield strength, ultimate strength, and yield strain are taken experimentally from tensile-test data of the riser tubes of boiler furnaces of Petrochemical Industry in Basrah. The experimental values are used in calculation of stress rupture. Heat transfer relations are used to calculate the temperature of the wall tube. Also, pressure to rupture required for causing plastic flow (rupture) was derived by using failure criterion. Pressure to rupture compared to the stress rupture to find the value of failure temperature. A computer program was used to obtain the results as curves that are gives the value of failure and surface temperature and to show the effect of erosion and presence of deposits on the failure of tubes. | ||
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