a. If the user holds the liquid, it is calculated according to the specific gravity of the product, but the space for the product to be cracked by 10% due to thermal expansion (but the low boiling point product is also discussed) is to prevent the steel barrel from rising when it is deformed by falling.
b. If the user is holding a solid, the steel drum manufacturer is required to provide a certain volume of the steel drum to be tested, and then converted into a steel drum to be loaded with the required volume, but also must be reserved for a certain space for the plastic bag to be lined to prevent steel. The barrel rises when it is deformed.
c. If the user is holding a low-boiling product (generally referred to as a boiling point below 60 ° C), it is necessary to fully consider the vapor pressure of such products at a certain temperature, and the liquid vapor pressure increases with increasing temperature. In addition, it is necessary to consider the product filling temperature and the maximum storage and transportation temperature that the steel drum may encounter after filling. Generally, 55 °C should be considered. In some areas, the temperature difference between 60 °C should be considered, causing volume expansion of the product and causing steel. Internal pressure is generated inside the barrel. The sum of these two pressures cannot be greater than the allowable internal pressure of the steel drum, otherwise the steel drum will burst. Steel drums are allowed to withstand internal pressure. See the commodity inspection certificate or consult the steel drum manufacturer.
d. If the user fills the temperature higher (above 60 °C), the lowest temperature for storage and transportation should be taken into account. The temperature difference causes the steel drum to generate a negative pressure, which causes the steel drum to suck, or the steel drum is concave. Solution: 1. After filling the product to a certain temperature, screw the screw plug; 2. Leave enough space.
e. The height of the steel drum, the open barrel refers to the outer height after the cover is closed, the closed barrel refers to the outer height, and the composite barrel refers to the outer height.