If the user holds liquid, it is calculated based on the specific gravity of the product, but sufficient space must be reserved to prevent the steel drum from cracking when it is deformed due to falling and the product is cracking due to thermal expansion. If the user holds solids, they need to ask the steel drum manufacturer to provide a certain volume of steel drums for trial installation, and then convert them into steel drums with the required volume. However, they must also leave enough space for plastic bag lining to prevent steel drums. Cracking when deformed by drop. If users hold low-boiling products, they must fully consider that such products have vapor pressure at a certain temperature, and the liquid vapor pressure increases with increasing temperature. In addition, it is necessary to consider the temperature difference between the product filling temperature and the maximum storage and transportation temperature that the steel drum may encounter after the product is filled, causing the product volume to expand and causing internal pressure in the steel drum. The sum of these two pressures cannot be greater than the steel drum is allowed to withstand internal pressure, otherwise the steel drum will burst. Steel drums are allowed to withstand internal pressure, see the commodity inspection certificate for details, or consult the steel drum manufacturer. If the user's filling temperature is high, the minimum temperature for storage and transportation must be taken into account. The temperature difference causes negative pressure in the steel drum, which causes the steel drum to suck, or it will be concave when it touches the steel drum.
Secondly, determine the internal coating. The user can provide various internal coating samples provided by the steel drum manufacturer to perform a compatibility immersion test for more than 6 months and similar environmental conditions during storage and transportation to analyze whether the coating has changed and whether the pigment contained in the coating has been dissolved out. It is up to the user to select the appropriate type of inner coating. Products with a moisture content of more than 5% are not suitable for packaging in steel drums with epoxy phenolic, polytetrafluoroethylene, and pure phenolic coatings. There is a protective layer of mineral oil on the surface without inner coating. Users are kindly requested to pay attention to the impact on your products. Steel drums use cold-rolled plates as the basic raw material. Due to the rolling errors in the thickness of the cold-rolled plates, the steel drums have corresponding weight errors. During the production of steel drums, there is an unavoidable odor in the drum, so customers should pay attention when selecting them. The closed barrel spiral coil lining roll should be determined according to the user's product, and different materials are used. Users can provide different material liners from steel drum suppliers for more than one month to conduct compatibility immersion tests with similar environmental conditions during storage and transportation. After analyzing the swelling and deformation, the user can determine the type of liner material.https://www.fhpails.com/