Theoretical model and study of temperature field for buried steel pipeline during airtight test

DU Binkang, LU Zhiming, LU Pei, ZHU Shenjin, SHI Laimin

(Mechanical Engineering College, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: Aiming at getting the formula of the temperature inside and outside the buried PE pipe during the airtight test, a 1/2 physical and mathematical model was proposed, and the finite element software was applied to simulate the temperature distribution during the test considering the horizontal and vertical direction boundary conditions, the natural temperature field of the earth and the influence of the atmosphere temperature abrupt changing. Another computational formula was fitted based on the temperature data achieved by the airtight test. According to the comparison with the temperature data getting from the airtight test,the results indicate that the simulation is accurate and rational, and the formula fitted based on the airtight test is proved to be reliable and accurate.

Key words: buried pipeline; airtight test; temperature field; theoretical model