Abstract:For buried high temperature subsea pipelines, if the axial movements are restrained, large axial compressive forces will occur and these compressive forces will cause upward buckling (UHB), namely the upheaval buckling. After pipeline buckling occurs, there will be two possible consequences： strength failure, or other type of failure resulting from the deviation from design conditions since the buried pipeline comes out of the seabed. Recently, more and more offshore marginal fields are developed, the transporting temperature rises, and the pipeline design temperature rises accordingly, so the UHB will be probably a critical case. Aiming at this problem, three methods for UHB analysis are presented and the applicable scope is discussed.