کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
769630 1462979 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of creep damage of INCOLOY 800HT pigtails in a refinery steam reformer unit
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Evaluation of creep damage of INCOLOY 800HT pigtails in a refinery steam reformer unit
چکیده انگلیسی


• Creep strains in pigtails have been predicted with FEM calculations.
• Critical areas in terms of maximum creep strains have been identified.
• Effect of temperature, thickness and counterweights has been assessed.
• Metallurgical evaluation of creep damage has been performed.

Pigtail tubes constitute a critical component of the outlet system of steam reformer units for hydrogen production in refineries. Creep failure of pigtails is a common cause of downtime and potential risk to plant personnel. In this paper, finite element analyses are combined with experimental techniques in order to evaluate creep damage in INCOLOY 800HT pigtails of a reformer unit. A finite element model has been developed in order to investigate the creep behavior of pigtails under various operating conditions. A metallurgical evaluation of creep damage has been performed on pigtail samples removed after 8.5 years of operation. The results indicate that the most important parameters affecting the structural behavior of pigtails are the operating temperature, reduction of thickness, magnitude of counterweights and grain size of the alloy. A comparison between the numerical calculations and the metallurgical evaluation is also reported.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Failure Analysis - Volume 45, October 2014, Pages 456–469
نویسندگان
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