| 21. | No . 15's last run was on August 12, 1973, when a boiler tube blew out, scalding the locomotive engineer.
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| 22. | The Syracuse Tube Company was in operation by 1893 in the production of lap welded wrought iron pipe and boiler tubes.
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| 23. | Afterward, another round of trials were conducted in the Baltic, which revealed the necessity of replacing several of the boiler tubes.
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| 24. | After repair the engine returned to LBNGR and was in regular use from 2004 until the boiler tubes gave out prematurely.
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| 25. | Engineers came from Germany to work on the ship . " Goeben " had 4, 460 boiler tubes replaced, among other repairs.
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| 26. | The problems were solved by understanding the gas flows within the boiler redesigning the boiler tubes to minimise the effects of erosion.
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| 27. | In 1972, problems with the use of galvanised wire that was used to attach thermocouples to stainless steel boiler tubes were discovered.
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| 28. | The boilers are inclined to ensure that the boiler tubes and the firebox are always covered by water when on the gradient.
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| 29. | Radiant heating of the boiler tubes is the same, but there is less convective heat transfer, giving a higher superheater gas inlet temperature.
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| 30. | Dr Church had invented an expanding mandrel for fixing boiler tubes, and it was the first tank engine to have a multitube boiler.
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