Seeking help regarding regulations for loading/unloading hazardous chemicals
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I need help: what is the required downtime for vehicles containing hazardous chemicals (gasoline, diesel, liquefied gas products) after loading/unloading, and after filling (unloading) is completed? Which specification requirement is being followed? Or what is the detection method for fully releasing static electricity? I’ve seen many sources suggest leaving the device stationary for 10 minutes before and after loading, while others recommend 3–5 minutes. I’m not sure what the basis for this is. The static electricity grounding connection remains active throughout the loading process, so why is it necessary to leave the device stationary for such a long time after loading is complete? Some standards provide overly general descriptions; they only state that static electricity should be fully discharged, but do not specify any methods for detecting such full discharge. I would appreciate it if the teachers could offer some guidance!
There are no specific requirements, right? Just connect the static discharge device – is it necessary for it to be stationary as well?
In accordance with Article 4.2.6 of the \"Code for Static Electricity Safety of Liquid Petroleum Products\" GB13348, after filling the tank car, it should be left stationary for at least 2 minutes before sampling, temperature measurement, volume inspection, and removal of the grounding wire are carried out
SINOPEC An 2008【465】 “Regulations on Antistatic Safety for Flammable Liquids” stipulates that for flammable liquids of categories A and B, railway and road tank cars should be left stationary for at least 2 minutes before sampling, temperature measurement, and level checking are carried out using antistatic materials. There are also regulations regarding the flow rate, and so on