含堆焊层临氢设备HTHA敏感性评价修正方法

加氢反应器等高温临氢设备由于长期在高温高压含氢或氢与硫化氢环境下服役,可能会出现高温氢腐蚀(HTHA)、氢脆等损伤现象,直接关系到装置的长期稳定可靠运行。为了防止出现氢损伤现象,多采用奥氏体不锈钢单层或多层堆焊技术。针对RBI技术中HTHA模块对于含堆焊层结构的临氢设备在评估时并未考虑堆焊层的影响,从氢扩散理论出发,考虑堆焊层的影响,提出采用有效氢分压的方法开展HTHA敏感性Pv因子的计算,并改进了E347+E309L双层堆焊层结构的临界Pv修正因子。

Correction of HTHA Sensitivity Assessment of Hydrogen -containing Equipment with Surfacing Layers

Due to the long -term contact with high temperature and high pressure with hydrogen or hydrogen and hydrogen sulfide of hydrogen-contacting equipment ,such as hydrogenation reactors ,high temperature hydrogen attack (HTHA) and hydrogen embrittlement will be caused ,which is directly related to the long -term ,stable and reliable running .To prevent the damage of hydrogen ,the technology of single or multiple surfacing layers of austenitic stainless steel is used .But the ef-fect of surfacing layers is not considered under HTHA module of RBI technology when assessing hydrogen -contacting equip-ment with surfacing layers ,so in this paper ,by the theory of hydrogen diffusion and considering the effect of surfacing lay-ers ,the method of effective hydrogen partial pressure is proposed to calculate the sensitivity factor of HTHA , Pv ,in addi-tion ,the critical correction factor , Pv ,of double surfacing layers structure of E347+E309L is improved .