Abstract The present study is focused on the metallurgical factors induced during high-temperature operation of a pipeline that resulted in its short-time The pipeline is used as superheater in a lignite power-plant unit and is constructed by an array of steel tubes jointed together by circumferential Systematic recording of data over one year of service indicated that local material’s failures were occurring, on an average, every 15 days and localised either at curved areas of the tubes, or in the neighbourhood of circumferential Visual inspection, macrographic examination and microscopic observations of representative failed parts revealed microstructural features indicative of creep In both cases, the material failed due to the rapid growth and coalescence of creep voids, initiated at a service temperature equal to 43% of the steel melting Article Outline Background information and service history Experimental techniques Results Failure at the curved areas of the pipeline Failure in the neighbourhood of welding Discussion and conclusions Acknowledgements Reference_ob=ArticleURL&_udi=B6V2X-4TGXPGN-3&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1106784718&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=4c3bc59690b1bb7685c76ad2c4052fbf
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