Fatigue life analysis of cracked gas receiver of emergency cut-off system in gas gathering station

4th International Conference on Advanced Composite Materials and Manufacturing Engineering 2017

材料科学;化学

Hu, Junzhi^1 ; Zhou, Jiyong^1 ; Li, Siyuan^1

Second Gas Production Plant of Petro China Changqing Oilfield Company, Shanxi, China^1

关键词: Fatigue life analysis;    Gas gathering station;    Maintenance cycles;    Normal operations;    Pressure fluctuation;    Semi-elliptical surface cracks;    Theory of fracture mechanics;    Working parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/207/1/012103/pdf
DOI  :  10.1088/1757-899X/207/1/012103

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Small-scale air compressor and gas receiver are used as the driving gas of the emergency cut-off system in gas gathering station. Operation of block valve is ensured by starting and stopping compressor automatically. The frequent start-stop of compressor and the pressure fluctuation pose a threat to the service life of gas receiver, and then affect normal operation of the emergency cut-off system and security of gas gathering station. In this paper, the fatigue life of a pressure vessel with axial semi-elliptical surface crack in the inner wall is analyzed under the varying pressure by means of the theory of fracture mechanics. The influences of the amplitude of pressure fluctuation and the initial crack size on the residual life of gas receiver are discussed. It provides a basis for setting the working parameters of gas receiver of emergency cut-off system and determining the maintenance cycle.