Fire hazard classification of sulfur trioxide
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I have a question for everyone: Does the fire hazard of sulfur trioxide fall under Category B? Can this be found in any relevant standards?
Sulfur trioxide falls under Category B fires, as specified in the GB50016-2014 Code for Fire Protection of Buildings
Sulfur trioxide has strong oxidizing properties; it seems that no examples of it being classified as a substance of Class B in terms of fire hazard can be found in the relevant standards. However, we generally make judgments by referring to sulfuric acid with fumes (which is a mixture of sulfuric acid and sulfur trioxide). There are specific examples in the building codes for sulfuric acid with fumes, which are classified as substances of Class B in terms of fire hazard.