Creep damage to a steam pipe of an intermediate superheater operating for 90 000 hours

Creep damage to a steam pipe of an intermediate superheater operating for 90 000 hours

A longitudinal crack appeared in a straight segment of a steam pipeline of an intermediate superheater after operating for 90 000 h. The pipeline of 14MoV63 steel with dimensions 609x25 mm operated at a temperature of 540 deg C under a pressure of 18 MPa. We found that its failure is mainly explaine...

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Veröffentlicht in:Materials science (New York, N.Y.) N.Y.), 1994-09, Vol.30 (5), p.581-588
Hauptverfasser: Sijacki-Zeravcic, V, Markovic, A, Stamenic, Z, Milanovic, D, Knezevic, P
Format: Artikel
Sprache:eng
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Zusammenfassung:A longitudinal crack appeared in a straight segment of a steam pipeline of an intermediate superheater after operating for 90 000 h. The pipeline of 14MoV63 steel with dimensions 609x25 mm operated at a temperature of 540 deg C under a pressure of 18 MPa. We found that its failure is mainly explained by creep. To establish the causes of creep in the straight segment of the steam pipeline, whose predicted service life was 100 000 h, we determined the mechanical characteristics of the material and studied its microstructure and fracture surfaces.
ISSN:1068-820X