Safety specifications for carbon dioxide small cylinder: How to avoid overpressure and leakage risks?
Publish Time: 2025-04-15
As a high-pressure container, the safe use of carbon dioxide small cylinder must strictly follow the specifications to avoid overpressure and leakage risks. The key points cover four dimensions: storage environment, operation process, equipment maintenance and emergency treatment.
The storage environment must ensure ventilation, dryness and away from heat sources. Carbon dioxide cylinders should be stored upright in a cool place with an ambient temperature not exceeding 45°C, avoiding direct sunlight or close to high-temperature equipment such as stoves and heaters. Excessive humidity will cause corrosion to the cylinder body, so humid environments should be avoided, such as not stacking in basements or open fields. If the ambient temperature may exceed the threshold, a mechanical ventilation system or air conditioning equipment must be equipped to ensure that the number of air changes per hour is not less than 6 times.
The operation process must strictly follow the safety steps. The pressure during filling must not exceed 15MPa, and the filling volume must be double-checked by weighing or liquid level gauge to prevent overfilling from causing overpressure. Before use, check the appearance of the cylinder body to confirm that there are no dents, cracks or rust, and focus on checking whether the safety valve and pressure gauge are intact. When connecting the pressure reducing valve, special tools must be used. Direct operation with hands is prohibited to ensure that the sealing gasket is not damaged. When opening the bottle valve, it is necessary to operate slowly to avoid rapid pressure relief causing the pressure reducing valve to freeze or the valve to be damaged. If it needs to be placed horizontally, an anti-dumping bracket must be installed, but the lying time must not exceed 15 minutes, and the temperature of the bottle must be checked regularly to prevent local overheating.
A regular inspection system must be established for equipment maintenance. The appearance of the gas cylinder must be inspected every month, and the pressure gauge reading and temperature changes must be recorded. If the pressure is found to be abnormally high, it must be stopped immediately. A water pressure test must be carried out every three years, and the test pressure is 1.5 times the design pressure. It is considered qualified if there is no leakage for 5 minutes. The safety valve must be calibrated once a year to ensure that the opening pressure is 18.6±1MPa. If frost is found on the surface of the bottle or the pressure gauge pointer shakes, the gas cylinder must be isolated immediately and a professional organization must be contacted for inspection.
Emergency treatment requires a plan and protective equipment. If a leak occurs, the bottle valve must be closed immediately and personnel must be evacuated, and ventilation equipment must be used to disperse the accumulated gas. When the leakage is large, chemical protective clothing and respirators must be worn, and open flames or spark-generating equipment are prohibited. In case of fire, dry powder fire extinguishers or carbon dioxide fire extinguishing systems must be used to put out the fire, and water-based fire extinguishers are prohibited. After the accident is handled, the gas cylinders must be fully inspected, including wall thickness measurement, non-destructive testing, etc., and can only be reused after confirming that there is no damage.
The safety management of carbon dioxide small cylinders must be carried out throughout the entire life cycle, and standardized processes must be established from procurement, storage to use and scrapping. By strictly implementing safety regulations, the risks of overpressure and leakage can be effectively reduced, and the safety of personnel and equipment can be guaranteed.
