Sulfuric acid fire hazards

From the fire hazard classification of production and storage, if it is concentrated sulfuric acid, it is generally classified as a Class B fire hazard because of its oxidizing properties.

The fire protection regulations for fuming sulfuric acid illustrate that the fire hazard is classified as Category B. There is no doubt about this. As for 98% concentrated sulfuric acid, although it is also oxidizing, it does not belong to the oxidants described in fire hazard class A, nor does it belong to the secondary oxidants described in fire hazard class B. (You can check it in the standards of hazardous chemicals oxidizers and dangerous goods numbers, and 98% concentrated sulfuric acid is classified as Class B) Category 8 corrosives, not Category 5 oxidants). Therefore, I personally believe that the early preliminary design classified the fire hazard of 98% concentrated sulfuric acid into Category E. The focus of safety design should be on corrosion and leakage prevention. Of course, during review or filing, if experts disagree, it needs to be classified as Category C or even Category B, and it still needs to be modified. :lol:lol:lol

According to the fire level classification, it should be classified as Category E

Regarding the classification of sulfuric acid fire hazards, "experts" have different opinions and cannot agree on one thing. Because the fire hazard category of sulfuric acid was recently involved, I checked the relevant regulations. Finally found a reliable basis, but the regulations of two different industries have different regulations.: One is the "Fire Protection Code for Textile Engineering Design" GB50565-2010. In the example of fire hazard classification, concentrated sulfuric acid is classified as Category B (precision room of viscose fiber factory). The other is "Code for Fire Protection Design of Non-ferrous Metallurgical Engineering" BG50630-2010. In the fire hazard classification examples explained in the article, the production and use of concentrated sulfuric acid are classified as Class C, and in the fifth explanation below, it is stated that fuming sulfuric acid is Class B. Moreover, both specifications were jointly compiled by the industry and the Ministry of Public Security, and should both be valid. Therefore, my personal understanding is that when determining the fire category of concentrated sulfuric acid, you should first determine the industry to which the project belongs. For example, in the textile industry, most raw materials, intermediates and products are flammable, and sulfuric acid has strong oxidizing properties, so it should be classified as Class B. In other industries, if other items in the area where sulfuric acid exists are not flammable substances, it can be classified as Class C.