Whether Plastic Pail Moulds can be used for flammable materials (such as gasoline), anyone with a little experience knows that they cannot. So can plastic barrels coated with anti-static coatings contain flammable materials? The answer is vague.
- The electrostatic hazard analysis of ordinary plastic barrels when they contain flammable liquids
Hazard 1: Ordinary plastic barrels are in contact with the outside and rubbed, especially the movable plastic barrels, which accumulate static charges on the outer surface during the transportation. When static electricity accumulates to a certain degree, brush-type power generation may occur, and the energy of brush-type discharge is the largest It can reach 10mj. If the brush-type discharge happens to be near the mouth of the can, it may ignite the flammable vapor emitted from the mouth of the can, and the backfire will cause flash explosion in the can;
Hazard 2: When filling the barrel with liquid, due to the friction between the liquid and the wall of the filling tube during the filling process, static electricity will be brought into the barrel. When static electricity accumulates in the barrel, a brush discharge may occur between the liquid and the conductor. The brush-type discharge will ignite the flammable vapor cloud in the barrel and cause flash explosion in the barrel.
- Can plastic buckets contain flammable liquids?
According to the provisions of 4.6.2 of GB13348-2009 "Static Safety Regulations for Liquid Petroleum Products": Insulating containers should not be used to fill gasoline, kerosene, etc. Then why can we still see plastic barrels containing high-quality liquor in the supermarket? The author believes that the hazard of static electricity mainly depends on the amount of energy released by static electricity, and the small volume of plastic barrels, due to the small area and volume, the electric charge accumulated on it, even if it is discharged, is not enough to ignite flammable vapor. But how big is it allowed to dress up? The author consulted the American Consumers Association standard NFPA30-2008 "Flammable and Combustible Liquid Code" table 9.4.3, the description is as follows:
IA grade liquid: 5 liters
IB grade liquid: 20 liters
IC grade liquid: 20 liters
Class II liquid: 450 liters
Class III A liquid: 450 liters
III Level B: No limit
And 18L Pail Mould as also.
Conclusion: Plastic drums can hold a certain volume of flammable liquids, but not exceeding the above limit. (Note: According to the GB30000.7-2013 standard, the flash point value of flammable liquids in China is very close to that of NFPA)