Question regarding the change of storage medium for chemical storage tanks

When a chemical storage tank is used to store a different type of substance over the long term, there are several questions I would like to ask: 1. What procedures are required to change the substance stored in an atmospheric-pressure tank (which is not considered special equipment)? Which documents should be referenced? Similar changes are allowed; internal procedures for making such changes are required. 2. To carry out the company’s internal change procedures, is it still necessary for the design institute to issue a design change notice and revised drawings? For changes of the same type, internal procedures for making such changes are sufficient; however, for changes to Category A and Category B materials, a design change must be issued by the design institute, as there are many factors involved such as spacing, instruments, alarms, etc. In cases where it constitutes a major hazard source, even more design work is required. Therefore, there is no one-size-fits-all approach to handling changes, and much work needs to be done – this is provided only for reference. 3. If hazardous chemical products are involved, is it necessary to change the work safety license? For hazardous chemicals, this is absolutely essential. If you don’t have this variety but suddenly end up having it, it constitutes illegal storage.

1. Material categories such as Class A, B, and C should be consistent with the design； Otherwise, a design change is required. 2. For changes involving materials in the same category, internal change procedures may be followed; however, the description must be consistent with that stated in the license.