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Cover Requirement and Stability of Horizontally Bent Buried Pipelines
 

Summary: Cover Requirement and Stability of Horizontally
Bent Buried Pipelines
Hamdan N. Al-Ghamedy, e-mail: hghamdi@kfupm.edu.sa, fax: +966 3 860 2694
Sahel N. Abduljauwad, Junaid A. Siddiqui,
Naser A. Al-Shayea, and Ibrahim M. Asi
Department of Civil Engineering
King Fahd University of Petroleum & Minerals
Dhahran 31261, Saudi Arabia
Abstract. The soil cover requirement for horizontally bent buried pipeline is discussed.
The variables considered in this research include the pipe diameter and thickness, the
radius and angle of the bend, the internal pressure, the fluid specific weight, the
overburden height, the temperature rise, and the material used. A comprehensive three-
dimensional finite element analysis is run. The results obtained are utilized to develop
regression models for the maximum allowed temperature change as well as the minimum
overburden height. The relationships among the different variables are determined. To
guard against elastic instability, several buckling mode are checked.
Introduction
Cross-country pipelines are very common worldwide. Although some are utility pipes,
such as water, many of them are used in the oil industry to transport gas and other
petroleum products. These pipelines are often buried underground. Due to reasons related

  

Source: Al-Shayea, Naser Abdul-Rahman - Department of Civil Engineering, King Fahd University of Petroleum and Minerals

 

Collections: Engineering