Study on risk acceptance criteria for urban gas engineering

The medium in urban gas pipelines buried in soil are flammable, explosive and under a certain pressure, which is very dangerous to public. So it is necessary to carry on effective risk management to decrease risk, and how to make scientific risk acceptance criteria becomes key problem for risk analysis and decision. But because of lacking statistic material the criteria is not easy to be estimated using common method in China. In this paper, a new method to estimate it is present after introducing the meaning, principles and methods of calculating risk acceptance criteria. At present it is a relatively scientific method based on a modification coefficient, which is hoped to offer a new way to resolve the problems in making risk acceptance criteria.