Session: DA-09-02 Piping and Equipment Dynamics and Dynamic Response Analysis-2

Paper Number: 124142

124142 - Experimental Study on Mechanical Response of Urban Gas Pipeline Containing Single Defect Subjected to Heavy Truck Load 

With the increasing demand for roads in cities, the intersection of urban gas pipelines and roads is increasing. Pipelines are often impacted by heavy truck load, which threatens the structural integrity of pipelines. In order to investigate the mechanical behavior of urban gas pipeline containing single defect under heavy truck load, the full-scale experiment of Q235 spiral welded pipeline defects was carried out in this work. Through heavy rolling of four groups of pipes with different geometrical defects, the deformation of pipe top and the longitudinal strain and circumferential strain of defect center were collected in real-time. The relationship between the geometries of defect and the top deformation of the pipeline and the strain of the defect center was determined. The experimental results show that the maximum deformation of the pipeline occurs at right above the rolling pipe of heavy vehicle load ( i.e., the 12 o 'clock in clock orientation of the section of the pipeline). Under the action of heavy vehicle load, the pipeline material is still in the elastic stage, and the initial shape of the pipeline is restored after unloading. The influence of geometries of defect on the axial strain is negligible. Due to the local thinning of the defect, the bulging effect of the pipeline subjected to heavy truck load will occur in the defect. The circumferential bulging effect of defect can be evaluated by the circumferential strain. The length and width of the defect have little influence on the circumferential strain when the rolling load of the heavy vehicle is constant, and the bulging deformation can’t easy to observe. With the increase of defect depth, the circumferential strain at the center of defect increases, and the bulging deformation also increases. The results are expected to provide a basis for pipeline integrity assessment subjected to heavy truck load.

Presenting Author: Fei Ren China University of Petroleum, Beijing

Presenting Author Biography: FEI REN, Male, born in 1990, PhD candidate, Safety Science Engineering major, China University of Petroleum (Beijing), currently engaged in pipeline integrity management and other fields of research. Address: 18 Fuxue Road, Changping District, Beijing 100100, China. Tel: 13156585931. Email: renfeigz@163.com.

Authors:

Fei Ren China University of Petroleum, Beijing
Yi Shuai China University of Petroleum, Beijing
Zhiyang Lv China University of Petroleum, Beijing
Yuan Mei China University of Petroleum, Beijing
Dong Xie China University of Petroleum, Beijing
Lu Jiang Anhui Special Equipment Institute
Lumeng Jiang China National Oil and Gas Exploration and Development Co.
Shengyang Yu China National Oil and Gas Exploration and Development Co.