Increasing the life of flare tips
Increasing the life of flare tips
复制标题
延长火炬头的使用寿命
DOI：
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复制
发表时间：
2008
期刊：
影响因子：
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通讯作者：
P. Lee
中科院分区：
文献类型：
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作者：
A. Fox;Y. Huang;Dena Rafik;J. Williamson;T. C. Lindley;P. Lee
火炬头对于安全至关重要。维护是困难和昂贵的。火炬头经受高燃烧温度、热循环、氧化和海洋腐蚀。在一系列火炬头失效后，帝国理工学院对英国平台的火炬头失效进行了深入研究，以寻求使用寿命的延长。考虑了材料选择和设计解决方案。该研究考虑了替代材料，并得出结论，材料选择是答案的较小部分;设计更改可以使使用寿命加倍。本研究采用失效调查、高温实验及热机械模型分析。建模过程模拟了两种常见的燃烧条件，并正确地预测了观察到的失败的启动和裂纹扩展的孔用于螺栓上的火焰稳定板的顶部的火炬。计算的热应力和应变使低周疲劳寿命和最低蠕变寿命进行预测。得出的结论是，使用寿命可以通过用Inconel合金625（UNS N 06625）代替Incoloy合金800 HT（UNS N 08800）来提高，该合金具有吸引人的机械性能和改善的高温耐腐蚀性。重新定位或消除螺栓孔可以使使用寿命加倍。版权所有2008年，石油工程师协会。
Flare tips are essential for safety. Maintenance is difficult and costly. Flare tips are subjected to high combustion temperatures, thermal cycling, oxidation and marine corrosion. Following a number of flare tip failures an in depth study by Imperial College was carried out into the failure of a flare tip from a UK platform, looking for service life improvement. Materials selection and design solutions were considered. The study considered alternative materials and concluded that materials selection was the smaller part of the answer; design changes can double service life. This study used failure investigation, high temperature experimental and thermo-mechanical modelling analysis. The modelling process simulated two common flaring conditions and correctly predicted the observed failure of initiation and crack propagation from holes used to bolt on flame stabilizing plates to the top of the flare. The calculated thermal stress and strains enabled the low cycle fatigue life and minimum creep life to be predicted. It was concluded that service life could be improved by replacing Incoloy alloy 800HT (UNS N08800) with Inconel alloy 625 (UNS N06625), an alloy with attractive mechanical properties and improved high temperature corrosion resistance. Repositioning or eliminating bolt holes can double service life. Copyright 2008, Society of Petroleum Engineers.