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首页> 外文会议>ASME Pressure Vessels and Piping Conference >REVIEW OF LIFE ASSESSMENT AND REPAIR STRATEGIES FOR HYDROGEN REFORMER FURNACE OUTLET HEADER CASTINGS
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REVIEW OF LIFE ASSESSMENT AND REPAIR STRATEGIES FOR HYDROGEN REFORMER FURNACE OUTLET HEADER CASTINGS

机译：氢重新改造炉出口集管铸件寿命评估与修复策略述评

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Steam methane reforming is the most common method of hydrogen production relevant for plants in the petroleum upgrading, downstream refining, methanol, and ammonia industries. Owner-operators of steam methane reformer furnaces continue to make repair and replacement decisions that involve the cast outlet manifold fittings. One key part of these plans is assessment of the weldability and remaining life of the cast components. The 20Cr-32Ni-lNb alloy casting materials typically used in the outlet manifolds are usually operated in the low end of their creep temperature range but are subject to metallurgical aging mechanisms which reduce their ductility, weldability, homogeneity, and fracture toughness. This paper covers the practices employed by several owner-users to optimize the lifecycle costs of the outlet manifold castings. These practices include but are not limited to controlled materials specifications, in-situ weldability tests, non-destructive testing in-situ and destructive testing post service, and repair practices such as annealing heat treatments. This paper also includes a limited survey of several owner-users and their fleets of reformer heaters. The details in the survey include the population of affected cast manifold components, alloy grades for the castings and welds, operating temperature ranges, number of startup and shutdown cycles, ranges of time in service, generic design details, and repair case studies. Also discussed are recent improvements in the state of the art for high temperature materials property data-gathering, as well as the structural modeling via Finite Element Methods. These new technologies are opportunities for future work to develop better strategies in the areas of condition assessment, repair planning, and remaining life prediction, taking into account the relevant parameters of installed manifold components, including: specific aging behavior of the casting chemistry, component mechanical design details, as well as the welding and heat treatment parameters during initial fabrication and subsequent maintenance activities.
机译：蒸汽甲烷重整是对石油升级，下游精炼，甲醇和氨业的植物相关的最常见方法。蒸汽甲烷重整炉的所有者 - 运营商继续进行维修和更换决定，涉及铸造出口歧管配件。这些计划的一个关键部分是评估铸件组件的可焊性和剩余寿命。通常在出口歧管中使用的20cr-32ni-lnb合金铸造材料通常在其蠕变温度范围的低端操作，但是经受冶金老化机构的影响，这减少了它们的延展性，可焊性，均匀性和断裂韧性。本文涵盖了多个所有者用户采用的实践，以优化出口歧管铸件的生命周期成本。这些实践包括但不限于受控材料规范，原位可焊性测试，原位原位检测和破坏性测试岗位服务，以及退火热处理等修复实践。本文还包括对多个所有者用户及其改革器加热器车队的有限调查。调查中的细节包括受影响的铸造歧管组件，合金等级的铸件和焊接，操作温度范围，启动和关闭周期数，服务范围，通用设计细节和修复案例研究。还讨论的是最近的技术技术的最新改进，用于高温材料性能数据收集，以及通过有限元方法的结构建模。这些新技术是未来工作，在成分评估，修复规划和剩余寿命预测领域开发更好的策略的机会，考虑到安装的歧管组件的相关参数，包括：铸造化学的具体老化行为，部件机械在初始制造和随后的维护活动期间设计细节，以及焊接和热处理参数。

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