【作者】 关凯书； 周腾飞； 章骁程；

【Author】 Guan Kaishu;Zhou Tengfei;Zhang Xiaocheng;The Key Laboratory of Safety Science of Pressurized System,Ministry of Education,East China University of Science and Technology;

【机构】 华东理工大学承压系统与安全教育部重点实验室；

【摘要】 随着环境问题的日益凸显以及原油质量日益下降,加氢装置被广泛地用于石油化工行业。由于相关工艺的要求,在服役过程中加氢设备需要承受高温高压和循环载荷,在评估加氢设备的寿命时必须同时考虑蠕变和疲劳对设备的影响。规范案例2605(Code Case 2605)中提供了两种评估2.25Cr1MoV钢制承压设备蠕变疲劳寿命的方法。利用大型有限元商业软件ANSYS按照规范案例2605中的两种方法分别计算了设备的蠕变疲劳寿命,并将两种方法的结果进行了比较。结算结果表明,两种方法计算出的设备的蠕变疲劳寿命基本相同,方法1作为一种简化后的方法可以用来评估2.25Cr1MoV钢制承压设备的蠕变疲劳寿命。最后根据计算结果提出了一些提高设备蠕变疲劳寿命的建议。更多还原

【Abstract】 With the increasing demand for petroleum and decreasing in the quality of crude oil,hydrogenation units is extensively used in the petroleum and refining industry and operated in critical environment.2.25 Cr1 MoV steel is a widely used material for hydrogenation reactors,which has excellent properties in mechanicsat high temperature and ability of resistance against hydrogen embrittlement and temper embrittlement.In order to satisfy the process requirement,the effect of coupled creep and cyclic load should be taken into account when life evaluation for pressure vessel is performed.Code Case 2605 provides two options to evaluate the creep-fatigue life of reactors constructed with 2.25 Cr1 MoV.This paper compared the difference in results obtained from ratcheting analysis and calculations of L_cwf on a typical structure by ANSYS according,respectively,to both option 1 and option 2.The result shows that creep-fatigue lives derived from the two options are nearly equal,so the simplified option 1 shall be a priority option to evaluate the creep-fatigue life.Also,some recommendation is proposed for extending of the creep-fatigue life.更多还原