基于GB/T 27512-2011的管道设计审查阶段风险评估

Risk assessment in the stage of pipeline design review based on GB/T 27512-2011

管道设计审查阶段的风险评估,可使管道在建设初期消除一些安全隐患,预估后期可能出现的问题,及早做好预警措施和方案。通过管道风险评估规范分析对比,介绍现有国家法规对城镇燃气管道设计审查阶段风险评估的规定,通过实际工程应用,基于GB/T 27512-2011《埋地钢质管道风险评估方法》分别对管道的失效可能性(包括设计控制、施工控制、第三方破坏控制、腐蚀控制)以及管道的失效后果进行风险评估,最终获得该管道在设计审查阶段的风险值和风险等级,同时根据各因素分值分布情况对管道设计施工提出降低风险的措施,保障管道的安全运行。

By conducting risk assessment in the stage of pipeline design review,some potential pipeline safety hazards can be removed in the early stage of pipeline construction and possible problems in the later stage can be predicted further so as to prepare precautions and plans as early as possible.In this paper,risk assessment regulations for pipelines were analyzed and compared,and the provisions on the risk assessment in the design review stage of urban gas pipeline stipulated in current national laws and regulations were introduced.Then,risk assessment was conducted on the failure probability (including design control,construction control,third-party damage control and corrosion control)and failure consequence of pipelines based on Risk assessment method for buried steel pipeline (GB/T 27512--2011),combined with practical projects.Finally,the risk value and risk level of the pipeline in the stage of design review were obtained.In addition,the suggestions to reduce the risk of pipeline design and construction were proposed according to the score distribution of all factors so as to ensure the safe operation of pipelines.