Numerical Analysis of Buried Heating Branch Junctions

In this paper, the tee of buried heating pipe network has been investigated via the elastic-plastic finite element method. Fourth equivalent stress and distribution regularity of buried heating tees have been analyzed at different branch pipe diameter d/D and different branches length. The obtained results show that the limit length of tees decreases for the pipe diameter above DN500. The smaller diameter can lower the Von Mises stress of tees effectively. The stress of the outer wall is always greater than the internal stress.