Can benzene, toluene, and xylene be placed in the same tank group?

Benzene, toluene, and xylene are all benzene derivatives with similar chemical and physical properties; therefore, it is completely fine to store them in the same tank group.

If it is only for storage, a considerable amount of storage is sufficient. But it’s different in aromatic compounds plants: the demand for mixed xylene is high, so much larger storage tanks are required compared to those needed for benzene and toluene, and it’s not appropriate to store them together ； Placing them in areas where mistakes are likely to occur, thus affecting safe production, is not appropriate. The problem should be divided into two parts, and each specific issue should be analyzed individually.

No, both SH3007 and GB50074 clearly stipulate this

It should be possible, but the existing stock needs to be controlled in accordance with the regulations

GB50074-2014 Code for Design of Oil Depots: Storage tanks for liquids with toxicity levels 1 and 2 should be located in separate tank areas; benzene is extremely toxic and classified as having toxicity level 1

1. GB50074-2014 Code for Design of Oil Storage Tanks: Storage tanks for liquids with toxicity levels I and II should not be located in the same tank group as storage tanks for other flammable and combustible liquids. Benzene is classified as Grade II, while toluene and xylene are classified as Grade III. 2. GB50351-2014 Code for Design of Fire Dikes in Tank Areas: Tanks storing liquids of toxicity grades I and II should not be located within the same fire dike as tanks storing other flammable and combustible liquids.

According to GB5044, benzene is classified as Class I, representing extreme hazard.

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