天然气管道内涂层失效因素及安全评价

为了提高天然气管道内涂层安全评价的科学性和合理性,通过开展内涂层性能实验研究,并结合天然气管道内涂层实际服役调查情况,利用鱼骨图分析了影响内涂层安全性的因素,建立了天然气管道内涂层评价指标体系,提出基于模糊层次分析法的天然气管道内涂层安全评价方法,并使用该方法对某临海天然气管道内涂层进行安全评价,结果表明:利用新指标体系的模糊层次分析法,能够有效评价天然气管道内涂层的安全现状,可以解决内涂层评价的复杂性、不确定性及多层次性难题,为天然气管道内涂层的安全评价提供了更加科学的思路。

Failure factors and safety evaluation of internal coating of gas pipeline

In order to improve the scientificity and rationality of the safety evaluation on the inner coating of natural gas pipelines, the performance of the inner coating was experimentally studied. Then, combined with the actual service investigation of the inner coating of natural gas pipeline, the factors affecting the safety of the inner coating were analyzed by using the fishbone diagram. Then, an evaluation index system on the inner coating of natural gas pipeline was established. Finally, a safety evaluation method based on Fuzzy Analytic Hierarchy Process (FAHP) used for the inner coating of natural gas pipeline was proposed and applied to evaluate the safety of the inner coating of a certain offshore natural gas pipeline. The results show that the FAHP based on the new index system can effectively evaluate the safety situation of the inner coating of natural gas pipelines and solve the complexity, uncertainty and multi-level difficulty in the evaluation of the inner coating. The research results provide a more scientific idea for the safety evaluation on the inner coating of natural gas pipelines.