In the paper, the status quo and development trend were introduced of Chinese Oil and Gas pipeline industry, the significance of safety assessment for oil and gas pipeline was also-expounded. The category was summarized of safety assessment, the safety assessment methods for defect containing pipeline and their progress were generalized. The safety assessment for oil and gas pipeline can be categorized as three aspects: the safety assessment of geological disaster, the integrity assessment for defect containing pipeline, and the effective protective life prediction for protection coating layer. The pipeline integrity
assessment methods can be further categorized as remaining strength assessment and remaining life prediction for defect containing pipeline. The defects can be classified as five types for remaining strength assessment and three groups for remaining life prediction. Up to now, we have carried out integrity assessment for fourteen in-service oil and gas pipelines. In the near future, we should focus a certain extent of attention to the geological disaster assessment and effective protection life prediction for coating layer. Finally, one typical application example was introduced, that fully accounted for the
importance of safety assessment of oil and gas pipeline.
Key Words: safety, integrity, remaining strength, assessment, defect, remaining life prediction