Methods According to Hygienic Standards for the Design of Industrial Enterprises, an all-around recognition to harmful factors was performed in small and medium enterprises. 方法參照工業企業設計有關衛生標準，識別鐵合金生產中小企業的工藝流程中可能存在的職業危害因素。
Then, the affecting factors and results are graded according to experts grading method, thus a risk assessment for gas pipeline leakage is achieved. 根據專家評分法，對危害因素指標和後果進行評分，實現管道工作狀態的風險評價。
