This paper summarizes how to scientifically and rationally apply low alloy higntensile steel from the aspects of design material selectbo, manufacture, inspection and use manage ment based on the survey on application conditions of high-tensile steel in the pressure ves sels and pipelines of petrochemical enterprises This paper summarizes how to scientifically and rationally apply low alloy higntensile steel from the aspects of design material selectbo, manufacture, inspection and use manage ment based on the survey on application conditions of high-tensile steel in the pressure ves sels and pipelines of petrochemical enterprises