针对国内各海管及立管各损伤类型，总结在役海管损伤类型，分析海管损伤的原因。介绍了不同的评价方法。表面缺陷评价方法主要是评价损伤后的海管表面缺陷程度是否满足规范要求。力学强度评价方法评价局部应力是否超过规范要求；运用有限元模拟海管整体受力情况，从而判断海管整体强度是否满足规格要求。通过以上评价方法，判断海管受损后是否能继续运行。有效解决了服役中的管道受损结构评价问题，为项目决策提供参考。

 Different types of damage of the risers and subsea pipelines are summarized. The cause of the damage to the subsea pipe is summed up. The assessment methods and codes to check the different damage types are enumerated. The evaluation of surface defects is mainly to evaluate whether the surface defect degree of damaged subsea pipe meets the specification requirements. The evaluation of mechanical strength can tell us whether the local stress is exceeding the requirements of the code; the finite element method is used to simulate the overall pipeline stress, so as to judge whether the overall pipeline strength meets the specification requirements. Through the above evaluation methods, we can judge whether the subsea pipe can continue to operate after damage. It effectively solves the problem of in-service pipeline damaged structure evaluation, providing a reference for the project decision.