Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, an A2-grade pressure vessel manufacturing license, an A2-grade pressure vessel design license, a B-grade boiler installation license, and GB2/Class, GC2/Class pressure pipeline installation licenses, as well as an equipment and machinery installation contracting qualification. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the director unit of the Shandong Equipment Manufacturing Association. The company has also passed the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
The safe operation of low-temperature CO2 storage tanks is primarily critical in the following aspects: Design and Manufacturing: The tank's design and construction must comply with relevant standards and regulations to ensure they can withstand working conditions in low temperatures and high pressures. The tank should have sufficient strength and sealing performance to prevent leaks and ruptures. Safety Valves and Pressure Control: The tank should be equipped with safety valves and pressure control devices to ensure internal pressure remains within a safe range. Safety valves should be inspected and tested regularly to ensure proper functioning. Temperature Control: Effective temperature control is necessary for low-temperature CO2 storage tanks to prevent freezing or embrittlement due to extremely low temperatures. Appropriate insulation materials and equipment should be used to maintain the tank and pipeline temperatures within a safe range. Leak Detection and Alarm: The tank should be fitted with leak detection devices and alarm systems, along with corresponding monitoring equipment. These devices can detect leaks promptly and trigger alarms for appropriate action. Safe Operation and Training: Operators should receive relevant training to understand the safety operation procedures and standards for low-temperature CO2 storage tanks. Operators should be familiar with the tank's characteristics, working principles, and emergency response measures. Regular Inspection and Maintenance: Tanks should be regularly inspected and maintained, including visual inspections, anti-corrosion coating maintenance, and leak detection. Regular inspections can identify potential issues early and allow for timely repair measures. Emergency Preparedness: Establish an emergency response plan and equip with appropriate fire-fighting and first-aid equipment. Operators should be familiar with emergency procedures and capable of responding swiftly to emergencies. Please note that the above points are general recommendations. Specific safety operations should be based on the design and usage requirements of the low-temperature CO2 storage tanks. Before using the tank, it is recommended to refer to relevant safety operation manuals and guidelines to ensure operational safety.

During routine inspections of carbon dioxide storage tanks, follow these steps: - Visual Inspection: Check for any obvious damage, corrosion, or oil leakage on the tank's exterior. Pay attention to any anomalies in the tank shell, valves, and pipeline connections. - Valve and Pipeline Check: Inspect the tank's inlet and outlet valves and pipeline connections for proper operation, leaks, or looseness. Ensure valves are operable and reliable. - Pressure Relief Device Check: Verify that the tank's pressure relief devices (such as safety valves) are functioning correctly. Confirm that the set pressure of the relief devices meets requirements. - Level Measurement System Check: Assess the accuracy and reliability of the level measurement system. Calibrate the level sensors to ensure accurate level readings. - Pressure and Temperature Check: Check that the tank's pressure and temperature sensors are working properly. Confirm the accuracy of pressure and temperature measurements. - Safety Equipment Check: Inspect the tank's safety equipment, such as safety valves, pressure sensors, and temperature sensors, for proper operation. Verify that their set parameters are in compliance. - Fire Protection Equipment Check: Ensure that fire protection equipment around the tank is intact and that fire extinguishers, sprinkler systems, etc., are functioning correctly. - Liquid and Gas Quality Check: Confirm that the quality of the carbon dioxide liquid and gas in the tank meets specifications, with no impurities or contaminants. - Documentation and Reporting: Record the date of inspection, contents of the inspection, identified issues, and actions taken. Submit inspection reports to relevant departments or management as needed. - These are general steps for routine inspections of carbon dioxide storage tanks. Specific procedures should be tailored to the tank's characteristics and requirements. Always adhere to safety operating procedures and perform inspections by trained personnel.

Carbon dioxide (CO2) and liquid oxygen (LOX) storage tanks are used for storing different gases, with some differences in their physical properties: - Physical State: CO2 is a gas at room temperature and requires low temperatures and high pressures to become liquid. LOX is a liquid at room temperature and can maintain its liquid state without special conditions. - Storage Temperature: The liquid storage temperature for CO2 typically ranges from -40°C to -78.5°C, while for LOX, it is usually between -183°C and -183.15°C. The storage temperature for LOX is lower and requires more stringent insulation measures. - Storage Pressure: The liquid storage pressure for CO2 usually falls between 5-20 MPa, while for LOX, it is typically between 0.2-2 MPa. The storage pressure for LOX is lower. - Density: The density of liquid CO2 is approximately 0.8 g/cm³, while the density of liquid oxygen is about 1.14 g/cm³. The density of liquid oxygen is higher. - Safety: LOX has a high oxygen content, making it highly flammable and oxidizing, necessitating stricter safety measures. CO2 is relatively safe but can still be harmful to humans at high concentrations.

The inspection frequency of carbon dioxide storage tanks should be determined based on local regulations, standards, and manufacturer recommendations. Generally, several factors influence the inspection frequency of carbon dioxide storage tanks: - Regulatory and Standard Requirements: Different regions may have varying regulations and standards that specify the inspection requirements and frequency for tanks. For instance, the U.S. DOT standards require liquid gas tanks to undergo external inspections every 5 years and internal inspections every 10 years. - Manufacturer Recommendations: Manufacturers typically provide recommendations for inspection frequency, based on tank design, materials, and service life, which can serve as references for developing an inspection plan. - Usage Environment and Conditions: The environment and conditions in which the tank is used also affect the inspection frequency. For example, if the tank is exposed to corrosive environments or frequently subjected to mechanical stress, more frequent inspections may be necessary. - Generally, external inspections of liquid gas tanks are conducted through visual inspections, ultrasonic testing, magnetic particle testing, and other methods to assess the external condition and potential defects of the tank. Internal inspections may require emptying the tank and using internal inspections, thickness measurements, and weld inspections to evaluate the internal condition. - It is crucial that inspections be performed by trained and experienced personnel and strictly adhered to the relevant regulations, standards, and manufacturer recommendations. Regular inspections and maintenance ensure the safety and reliability of the tank, reducing the risk of accidents.
Our company attaches great importance to technological innovation and R&D design. We possess 1 municipal-level enterprise technology center in Heze City, equipped with non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and other testing facilities. We have over 600 various instruments and equipment, including CNC machine tools, X-ray flaw detectors, digital ultrasonic flaw detectors, mechanical property testing machines, chemical analyzers, spectrometers, tensile testing machines, plasma welding machines, etc. The key products and technologies we have developed, such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, Shandong Provincial key projects, and Heze City innovative and excellent projects. We have cumulatively obtained 27 authorized utility model patents, 16 authorized invention patents, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Yajiang Li of Shandong University, has jointly developed deep cryogenic container processing technology, which adopts the international plasma arc + filler wire tungsten inert gas arc welding (PAW-GTAW) technology. After the provincial-level scientific and technological achievement appraisal, the technical level has reached the international standard in the field of deep cryogenic container manufacturing. Choose Zhongjie Special Equipment, and let's create brilliance together!