Question: Do liquid ethylene oxide and propylene oxide belong to liquefied hydrocarbons?
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Question: Do liquid ethylene oxide and propylene oxide belong to liquefied hydrocarbons? Are there any supporting documents?
Ethylene oxide and propylene oxide are organic compounds containing epoxy groups. They do not belong to liquefied hydrocarbons in the traditional sense, as they are not alkane substances but rather compounds. But they can be used as gas storage media in unconventional gas reservoirs; therefore, in this specific context, they can be classified as “other liquid substances” within the category of gas storage media. I have not yet found specific documents that define this, but relevant literature and materials from related fields can be used as a reference. .
Liquefied ethylene oxide belongs to Category A liquefied hydrocarbons, while propylene (with a boiling point greater than 15°C) belongs to Category B flammable liquids. It is listed in Table 2 of Clause 3.0.2, the Explanations of Provisions in the \"Fire Protection Design Standards for Petrochemical Enterprises\", as examples of the fire hazard classification for liquefied hydrocarbons and flammable liquids.
2.0.19 Liquefied hydrocarbon: Hydrocarbon liquids and other similar liquids with a vapor pressure greater than 0.1 MPa at 15°C, excluding liquefied natural gas.