Selection of Pipe Types for High-pressure Gas Pipelines Based on Accident Analysis
The statistical analysis on the pipe material problems of oil and gas pipelines and high-pressure gas pipelines during construction and service is made,and relevant suggestions are put forward.Based on accident statistics of different pipe types,high-frequency resistance welded steel pipes have the highest number of accidents,followed by seamless steel pipes and spiral submerged arc welded steel pipes.There is currently no analysis of accidents in longitudi-nal submerged arc welded steel pipes.The causes of accidents in seamless steel pipes and spiral submerged arc welded steel pipes are relatively scattered during the production process.The causes of accidents in high-frequency straight seam welded pipes are mainly focused on defects in the pipe weld seam,and the re-sults of Charpy impact test on the pipe weld seam do not meet the requirements.It is recommended to prior-itize the selection of pipe types with relatively low acci-dent rates proven by engineering practice.When selec-ting high-frequency resistance welded steel pipes,manufacturers with strict quality control measures and high reputation in the industry should be selected.The steel pipe used for high-pres-sure gas pipelines is improved and unified to PSL2 level in Petroleum and Natural Gas Industries—Steel Pipe for Pipeline Transportation Systems(GB/T 9711-2023),the technical specifications should clearly define the key requirements,and each item should be strictly checked and verified.
high-pressure gas pipelinepipe typeaccident analysisdefect
万方数据
维普
