Application of STT Welding Technology in Russian East Siberia-Pacific Oil Pipeline Project

In the light of the construction environment of Russian East Siberia-Pacific Oil Pipeline which passes through high-latitude and severe cold areas, the paper introduces in detail the process characteristics of STT welding technology, describes emphatically the regulation way for welding parameters.By means of experiment and commbined with field welding experiences, proper technical parameters of STT root bead suitable for low-temperature environment are obtained.