水下生产系统在我国海洋石油开发中应用越来越广泛。通常使用复合电液的方式对水下设备进行远程控制，控制管线采用超级双相不锈钢材质。但该材质在水下阴极保护系统下存在氢致开裂的风险。本文依据国外规范，建立了水下超双材料的氢致开裂评估流程，详细阐述了水下超双部件氢致开裂的有限元评估过程，给出了建模方法、结果提取和处理的方法，以及结果校核的标准；结合实际工程项目实例计算分析，将分析结果线性化处理；控制部件的应力应变水平，可以有效避免部件在水下同阴极保护系统作用下的氢致开裂风险；研究和阐述了双相钢的适用环境参数条件和氢致开裂试验评估。

Subsea production system has been widely used in offshore oil development in China. It usually uses composite electro-hydraulic method to remotely control subsea equipment. The control line uses super duplex stainless steel material， but this material has the risk of cracking caused by hydrogen in the subsea cathodic protection system. According to the corresponding foreign norms， the evaluation process of HISC of subsea super duplex stainless steel component was established， the finite element evaluation technology was elaborated. The modeling method， the method of result extraction， and the result checking were given. The calculation and analysis were combined with the practical project examples. Also， the applicable environmental parameters and hydrogen induced cracking test of evaluation technology are studied and elaborated.