Fire protection issues for sulfuric acid storage tanks
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Help! A sulfuric acid storage area will be constructed next to the dedicated unloading line for sulfuric acid (2 tanks of 1000t each – diameter 10.5m, height 8m) ； Sulfuric acid concentration 95%), it is necessary to determine: the distance between the storage tank and the unloading line as well as the dip pipe ； Tank spacing. Question: 1. The fire hazard classification for items stored with 95% sulfuric acid… is it Category B or some lower category? ； 2. Interim regulations regarding dedicated lines in the railway sector: The distance between the storage tank and the associated unloading line is 12 meters; can it meet the fire safety requirements? Waiting online for experts……
The fire hazard classification for items storing 95% sulfuric acid should be Class V, as, based on the physical properties of sulfuric acid, it is merely an acidic corrosive substance, and its flash point is irrelevant. Interim regulations regarding dedicated lines in the railway sector: The distance between the storage tank and the associated unloading line is 12 meters. Since the fire hazard associated with sulfuric acid is classified as Category V, no special fire separation distance is required; it is sufficient to meet the requirements of the manufacturing process. It should be able to pass the acceptance inspection in accordance with fire safety regulations. In accordance with standard requirements, a level gauge should be installed on the sulfuric acid storage tank, and the level signal should be transmitted to the control room ； The tank area shall be equipped with cofferdams that comply with GB 50351 ； A breather valve should be installed on the breather opening of the sulfuric acid storage tank.
The fire hazard classification of fuming sulfuric acid is based on Category B
Determining the fire hazard of a substance depends not only on its flash point; concentrated sulfuric acid has strong oxidizing properties, which means it is classified as a substance with at least Class B fire hazard
What you say makes sense, but there are no relevant regulations to support this claim. For example, building codes specify that the fire hazard classification for fuming sulfuric acid is Category B, and this is due to the presence of gases such as sulfur dioxide and sulfur trioxide. Furthermore, the guidelines for implementing safety production standards in sulfuric acid manufacturing plants also only require the installation of static electricity discharge devices, as well as fire-fighting equipment such as fire hydrants and steam fire extinguishing systems, in areas such as sulfur storage facilities, liquid sulfur storage tanks, and diesel storage tanks ； It was not mentioned that similar fire protection measures should also be taken for the sulfuric acid storage tanks. Therefore, claiming that the fire hazard of 95% sulfuric acid is classified as Category B is unfounded.