Ministry of Emergency Management’s “Basic Requirements for Lightning Early Warning Systems in Large Oil and Gas Storage Facilities (Trial)” and “Basic Requirements for Emergency Shutoff Systems in Oil and Gas Storage Enterprises (Trial)”

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Notice on the Issuance of the \"Basic Requirements for Lightning Early Warning Systems in Large Oil and Gas Storage Facilities (Trial Version)\” and the \"Basic Requirements for Emergency Shutoff Systems in Oil and Gas Storage Enterprises (Trial Version)\” To the emergency management departments (bureaus) of all provinces, autonomous regions, and municipalities directly under the Central Government, the Emergency Management Bureau of the Xinjiang Production and Construction Corps, and relevant central state-owned enterprises: In order to thoroughly implement the arrangements outlined in the \"National Plan for the Comprehensive Management of Safety Risks Related to Hazardous Chemicals\", and in accordance with the requirements set forth in the \"Work Plan for Implementing Safety Risk Control Measures for Large Oil and Gas Storage Facilities\" issued by the Safety Committee Office of the State Council, our company has prepared the \"Basic Requirements for Lightning Early Warning Systems in Large Oil and Gas Storage Facilities (Trial Version)\” and the \"Basic Requirements for Emergency Shutoff Systems in Oil and Gas Storage Enterprises (Trial Version)\” (see attachments). These documents are now issued to you; please implement them accordingly and ensure that the installation and use of lightning early warning systems in large oil and gas storage facilities, as well as the rectification of issues related to emergency shutdown systems, are completed by June 30, 2022. If you have any suggestions regarding issues that arise during the implementation process, please provide feedback promptly to the Second Department for Hazardous Chemicals Supervision under the Ministry of Emergency Management (contact person and phone number: Cheng Qiang, 010-64464262). Attachments: 1. Basic Requirements for Lightning Early Warning Systems in Large Oil and Gas Storage Facilities (Trial) 2. Basic Requirements for Emergency Shutoff Systems in Oil and Gas Storage Enterprises (Trial) Department of Hazardous Chemicals Regulation, February 24, 2022 Attachment 1 Basic Requirements for Lightning Early Warning Systems in Large Oil and Gas Storage Facilities (Trial) I. Scope of Application This document specifies the basic functions, system composition, technical specifications, as well as the requirements regarding early warning classification, emergency response, operation and maintenance for lightning early warning systems in large oil and gas storage facilities. II. Standards referenced: GB/T 27962 – Icons for meteorological disaster early warning signals; GB/T 38121 – Lightning protection – Thunderstorm early warning systems; GB/T 40619 – Technical specifications for lightning proximity early warning based on lightning location systems; T/CECS 688 – Technical regulations for lightning early warning systems; T/CMSA 0012 – Technical requirements for lightning monitoring and early warning in explosive and fire-hazardous areas; QX/T 262 – Guidelines for lightning proximity early warning technology. III. Basic functions: The lightning early warning system enables real-time monitoring, comprehensive detection, and early warning of lightning activities in large oil and gas storage facilities and surrounding areas by collecting relevant lightning-related data in real time. Its basic functions include: 1. Real-time lightning monitoring, with the capability to detect lightning-related parameters such as the electric field in the ground atmosphere in real time. 2. Thunderstorm approaching warning, including information such as the thunderstorm warning level, warning time, affected area, and when the warning is lifted. 3. Statistical query of lightning historical data, featuring functions for querying lightning warning information and conducting statistical analysis within a specified area. 4. It has the capability to exchange data with the national hazardous chemicals risk monitoring and early warning platform. IV. System Composition The lightning early warning system consists of a lightning detection module, a data processing module, and a user interface, among other components. 1. Lightning detection module: It consists of one or more components such as an atmospheric electric field meter, a lightning location system, and Doppler radar. The atmospheric electric field meter should be installed on-site at large oil and gas storage facilities, while the detection data from the lightning location system and Doppler radar are preferably obtained through third parties. 2. Data processing module: It should be equipped with hardware and software that support the communication, reception, storage, computation, and dissemination of lightning detection data. 3. Client side: includes one or more different types such as desktop versions, mobile versions, and data interface services. V. Technical specifications: 1. The lead time for lightning warnings shall be no less than 10 minutes. 2. The average effective lightning alarm rate shall be no less than 80%. 3. The detection radius is not less than 10 kilometers. 4. The detection accuracy of the atmospheric electric field is better than ±5%. 5. It features a three-level lightning warning function. 6. The storage period for historical lightning warning data shall be no less than 3 years. 7. The lightning detection modules installed on-site shall meet the electrical explosion protection requirements of large oil and gas storage facilities, with a protection rating of not less than IP65. 8. The lifespan of the lightning detection module is not less than 3 years. VI. Classification of lightning warning alerts: Lightning warning alerts are divided into three levels: 1. Level 1 warning: There may be lightning activity; the atmospheric electric field in the affected area is increasing, with fluctuations in this electric field. Flashbacks occur in areas located within 10 kilometers of large oil and gas storage facilities, and there is a possibility of lightning-related accidents. 2. Level 2 warning: There is a high likelihood of thunderstorms occurring. The atmospheric electric field in the affected area increases rapidly, with more intense fluctuations in this electric field. The locations where lightning strikes occur are 5–10 kilometers away from large oil and gas storage facilities, which increases the risk of thunderstorm-related accidents. 3. Level 3 warning: Thunderstorms are about to occur, with severe fluctuations in the atmospheric electric field in the affected area. The location of lightning strikes is within 0–5 kilometers of large oil and gas storage facilities, increasing the likelihood of thunderstorm-related accidents. VII. Operation and Maintenance 1. Before the rainy season each year, it is necessary to conduct timely inspections of hardware devices, network interfaces, software platforms, and the surrounding environment to ensure that the lightning warning system is operating properly, including sensors (probes), the main unit, temperature and humidity conditions inside the chassis, solar panels, batteries, etc. 2. When it is not possible to receive data from the lightning detection module properly, the operating status of the equipment and the communication conditions should be checked immediately. Appendix 2: Basic Requirements for Emergency Shutoff Systems in Oil and Gas Storage Enterprises (Trial) 1. Scope of Application This document applies to the modification of emergency shut-off valves in large above-ground atmospheric pressure storage tanks currently in use by oil and gas storage enterprises (tanks with a nominal diameter of 30 m or more, or a nominal volume of 10,000 m3 or more, excluding cryogenic tanks). II. Standards: GB 50074 – Code for Design of Oil Depots; GB 50737 – Code for Design of Oil Storage Facilities; AQ 3053 – Safety Technical Regulations for Vertical Cylindrical Welded Steel Storage Tanks; SH/T 3184 – Code for Design of Automation Systems in Petrochemical Tank Farms; SH/T 3005 – Code for Selection and Design of Automation Instruments in Petrochemical Industries. III. Technical Requirements: (1) Installation Location: 1. Emergency shut-off valves shall be installed on all process pipelines that are directly connected to the storage tanks. 2. An emergency shut-off valve should be installed between the storage tank and the flexible connection, and measures should be taken to prevent water hammer damage. (II) The actuator of the emergency shut-off valve in the actuating mechanism can be of pneumatic, hydraulic, or electric type, and must meet the following requirements respectively: 1. The failure mode of the pneumatic actuator should be FC (fail-closed), and fire safety measures shall be implemented. When a single-acting spring-return pneumatic actuator is used, the requirements of clause 10.3.6.7 of SH/T3005-2016 shall be met ； When a double-acting pneumatic actuator is used, the requirements of Article 10.3.6.14 of SH/T3005-2016 shall be met. 2. The failure mode of the hydraulic actuator should be FC (Fail-Closed), to ensure that the valve can be in a safe position in the event of a fire. 3. Electric actuators shall be equipped with emergency power supplies (such as UPS, EPS, emergency generator sets, etc.), and fire safety protection measures shall be taken to meet the requirements of Article 10.3.7.11 of SH/T3005-2016. (III) The valve body of the valve and the cable emergency shut-off valve shall be made of cast steel or forged steel, with a fire-resistant sealing structure. The power cables and signal cables of electric actuators should be provided with fire protection, which can be achieved through one measure or a combination of multiple measures such as the use of fire-resistant cables, direct burial, laying in cable trenches filled with sand, or laying within fire-resistant cable trays or protective tubes. (IV) Switching time: The full-stroke closing time of the emergency shut-off valve shall meet the process requirements, and the automatic closing time should not exceed 180 seconds. (5) The shutdown function of the emergency shut-off valve shall include the following shutdown capabilities: 1. Interlock shutdown of the feed shut-off valve when the liquid level is too high. 2. Manually close the shut-off valve through the valve body. 3. Close the isolation valve manually using the button outside the fire dike. 4. Manually remotely close the shut-off valve from the control room.