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    <subfield code="a">Microstructural analysis of ethylene furnace steel alloy tubes</subfield>
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    <subfield code="a">Transcripci&#xF3;n del resumen del autor. Several radiant tubes of n ethylene (C2H4) furnace at a petrochemical plant were analyzed after failure. Experimental results suggest that the failures were caused by exposure of the tubes to excessive temperature during service. It was recommended that the furnace temperature be closely controlled to avoid averheating the tubes</subfield>
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