Cautionary Notes

1. Cylinders must be stored in well-ventilated areas, with a distance of no less than 1.5 meters from any source of fire or heat. It is strictly prohibited to use fire to bake, scald with boiling water, or expose to direct sunlight. Regularly check the airtightness of cylinder valves and pipe joints, ensuring no leaks. Leaks can be detected using soap and water, but never with an open flame.

2. When lighting, ignite the igniter first, followed by opening the gas; do not reverse the order. There should be a person watching over it during use; do not leave it unattended to prevent boiling water from overflowing and extinguishing the flame, which could cause the liquefied gas to surge and lead to an explosion. After using the gas cylinder, the valve must be tightly closed to prevent gas leakage.

3. The liquefied gas in the cylinder should not be completely exhausted; a certain residual pressure must be maintained. The residual pressure should generally be greater than 49.03 kPa (i.e., 0.5 kg/cm2, gauge pressure) to prevent air from entering the cylinder. After the liquefied petroleum gas is used up, the remaining residue in the cylinder is also a flammable substance and should not be poured out arbitrarily to avoid fires caused by the flow and evaporation of the residue.

4. LPG cylinders are pressurized containers that require proper maintenance and regular inspections. Prevent them from falling or being struck during handling and use. Do not use metal tools to敲击 open the valve, and avoid direct sunlight and prolonged exposure to rain. The cylinders should generally be inspected every 2 years.

5. Although the explosive range of liquefied petroleum gas (LPG) is not very wide, its lower limit is small, making it easy to ignite and explode upon leakage. Additionally, since LPG is heavier than air, it tends to flow downward in the air, accumulating in low-lying areas and posing a hidden danger of gas explosion. Therefore, in areas where gas can leak, relying solely on window ventilation is insufficient; attention must also be given to lower-level ventilation.

6. When a gas leak is detected indoors, promptly open windows and doors for ventilation, allowing it to disperse towards a direction without open flames. It is strictly prohibited to use fire nearby. The area can only be used after the fault is resolved and the distinctive odor has dissipated. Dispose of any leaked liquid on the ground by covering it with sand and soil before removing it to a safe location. In case of a gas cylinder fire, immediately close the valve, move it to an open area outside, and extinguish the fire using dry powder extinguishers, carbon dioxide extinguishers, or by covering it with a wet sack.

7. Educate children not to tamper with gas cylinders at will, and users must be aware of the safety knowledge regarding the use of gas cylinders.

Low-temperature Storage Tank Structure:

A low-temperature storage tank is a compact storage device for low-temperature liquids, fully equipped with accessories (valves, safety systems, etc.). The tank consists of a carbon steel vacuum shell and a pressure vessel placed within it. It can operate under low to medium pressure as per actual design requirements. Explosion-proof plates and double safety valves can protect the tank in case of overpressure. The safety relief device is designed to protect the internal pressure vessel and vacuum shell, with its use and type determined by GB150 and the "Fixed Container Regulations." This includes a double safety relief valve and explosion-proof plate for the internal pressure vessel protection, as well as an explosion-proof cover for the vacuum shell (shell). The tank is designed and manufactured for safety, reliable operation, and durability (can operate without fault for many years). Strict adherence to proper safety and operational regulations is required when operating the tank.

High safety requirements. As the tank stores low-temperature liquids, in case of an accident, the refrigerated liquid would volatilize in large quantities, with the vaporization amount being approximately 300 times the original refrigerated state, forming explosive gas clouds in the atmosphere. Therefore, standards such as API, BS, etc., require double-walled tank structures and the application of sealing concepts. In the event of a leak in the first tank body, the second tank body can completely seal the leaked liquid and evaporated gas, ensuring storage safety.