Location of phosphorus trichloride storage tank
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This post was last edited by hkj0221 on 2009-10-28 at 14:56. Our factory’s phosphorus trichloride storage tanks were originally installed on the ground; when the safety inspection authorities conducted an inspection, they issued a order to move them underground. However, when another set of safety inspectors came to check, they said that having them underground did not comply with safety regulations and that they could not be installed there. Let’s discuss whether it is truly in line with safety regulations to have it on the ground or underground.
Class A and B storage tanks can be placed underground, with the required fire separation distance being reduced by half. Phosphorus trichloride does not belong to Class A or B, so it does not need to be placed underground; according to GB50016, it is also not advisable to place it underground. Moreover, given its properties, it is better to store it above ground rather than underground. If you are a phosphorus trichloride production facility, it is recommended to store the yellow phosphorus barrels underground for greater safety.
Phosphorus trichloride storage tanks can be installed either above ground or underground. However, phosphorus trichloride decomposes when it comes into contact with water, releasing a large amount of heat and posing an explosion risk; therefore, in both cases, it is necessary to take precautions against moisture and water intrusion, especially for underground tanks, where attention to waterproofing is particularly important； Furthermore, leaks in underground storage tanks are not easy to detect; therefore, stricter requirements are placed on the material, thickness, and corrosion resistance of the tank walls for such tanks ； Furthermore, phosphorus trichloride is a highly toxic substance, and its management should follow the \"five doubles\" principle.
Phosphorus trichloride is a highly toxic substance; storage tanks for it must be kept separately, and a five-dual management system should be implemented. It is recommended to use above-ground storage tanks.
Phosphorus trichloride is highly toxic and corrosive; its storage tanks must be enclosed by dikes (per Article 3.2.2 of GB50046-2008). The distance and height of these dikes must meet the requirements for preventing leaks. Level gauges equipped with guardrails should be installed, and it is advisable to have alarms for high and low liquid levels as well. Phosphorus trichloride tanks buried underground are clearly unsuitable and go against environmental protection principles; in the event of a leak, they can harm the surrounding soil, and it will be very difficult to restore it to its original state for a long time.
I have a few questions: 1. Phosphorus trichloride explodes when it comes into contact with water, according to code 50016. . . . . Why isn’t it classified as Category A or B? 2. Must highly toxic substances definitely be stored underground? I tend to agree with what was said on the third floor. Then, I’ll add a few more of my personal opinions. Leaks from underground storage tanks are indeed difficult to control, as the leakage and spread of phosphorus trichloride are not easily detectable even after the area is backfilled; therefore, installing alarm devices may not be very effective. But I don’t think phosphorus trichloride necessarily cannot be stored in underground tanks—after all, I can enhance the anti-corrosion measures for those tanks, shorten the interval between regular inspections, and increase the design margin against corrosion. Common phosphorus trichloride storage tanks are indeed above-ground; they are horizontal tanks (don’t ask why, I don’t know either). The most important thing is to keep it waterproof and moisture-proof; “store it in a dry and clean warehouse.” Keep away from flames and heat sources. The packaging must be sealed to prevent moisture from getting in. ”This is what makes phosphorus trichloride rather special. As for those five pairs of highly toxic substances, it’s not difficult. General requirements, very common. I’ve also seen phosphorus trichloride storage tanks placed in semi-underground concrete tanks, with a large canopy over them. It can prevent leaks, rain exposure, and the like.
Phosphorus trichloride is also a **controlled substance; the suggestion for the 6th floor is good, as it facilitates safer management!
Our workshop consists of storage tanks placed on the ground! They have been in use for 6 years now, and we are planning to dispose of them. I’m not sure how to go about it; any suggestions would be appreciated! Thank you in advance!
Phosphorus trichloride is a highly toxic substance; storage tanks for phosphorus trichloride must be kept separately, and a five-dual management system must be implemented. Such tanks should be installed above ground level. The distance and height between the dike and the tank must meet the leakage prevention requirements; a level gauge equipped with guardrails should be installed, and it is advisable to have alarms for high and low liquid levels. The most important aspects are water resistance and corrosion resistance.
Regarding the issue on the 6th floor, since phosphorus trichloride decomposes when it comes into contact with water, releasing a large amount of heat, the products formed are phosphorous acid and HCl gas; no flammable gases are generated that could cause combustion or explosion. Therefore, this situation does not meet the conditions specified in item 4 of Category A in Table 3.1.1； Phosphorus trichloride storage tanks really should not be buried directly.
The ground is fine; if not, ask that inspection department