Problems and countermeasures in the major hazard installations identification of hazardous chemicals

There are four problems more difficult to resolve about identification of major hazard installations for dangerous chemicals based on standard GB18218-2009 Identification of major hazard installation for dangerous chemicals,including,how to determine the threshold quantity of hazardous chemicals water solution,how to determine the legal range of materials in major hazard identification,how to determine the quantity of hazardous substances and the definition of threshold quantity for some hazardous material is unreasonable.The corresponding countermeasures to solve the problems were proposed in this paper.Based on the hazardous properties of the water solution,the threshold quantity of hazardous chemicals solution can be determined by table 2 in GB18218-2009.For non-hazardous substance with characteristic of flammable,explosive and toxic,if the quantity exceeds threshold quantity of similar hazardous chemicals,it is recommended to manage the substance referring to major hazard installations for dangerous chemicals.For threshold quantity of dangerous chemicals,it is advised to extrapolate the value based on harmful consequences or damage range that may be caused by hazard.For the determination of actual quantity of hazardous chemicals in one unit,it is recommended to select the maximum amount that manufacture may exist,or you can choose the amount of design.