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Indexed by:期刊论文

Date of Publication:2013-12-01

Journal:Huagong Xuebao/CIESC Journal

Included Journals:EI、PKU、ISTIC、Scopus

Volume:64

Issue:SUPPL.1

Page Number:159-164

ISSN No.:04381157

Abstract:Hydrogen production reformer furnace tubes made of cast austenitic alloy steels serve in the temperature range of 1073-1173 K and pressure around 3-4 MPa. Though the design life is about 100000 h, premature failures within 3-8 years are more common, mainly caused by premature creep induced by overheating. The cast tube material undergoes microstructural changes with service exposure and as a consequence, degradation in strength. The methods of macro inspection, chemical analysis, microstructure, scanning electron microscope and mechanical properties testing were used to analyze on the rupture HP40Nb steel tubes from a hydrogen production reformer furnace of one petroleum company when they were used only 18 h during the test run.The rupture life was very short and needed to find the reason, in case the similar incidents. The results show that the reason of failure for the furnace tubes is high temperature creep rupture and over temperature seriously is the direct reason. ? All Rights Reserved.