Ten Provisions on the Production and Use of Hydrogen

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Ten Provisions on the Production and Use of Hydrogen 1. For the production and use of hydrogen, it is necessary to establish comprehensive \"safety technical regulations for hydrogen production\" based on the characteristics of the production process and the actual requirements of safe production. Safety management measures against static electricity should be put in place for compressors, pipelines, and during venting processes. Additionally, safety management systems must be established to prevent air from entering equipment and production systems, as well as to stop high-pressure hydrogen from entering compressor systems and other utility systems such as those using nitrogen. It shall be strictly implemented upon approval by the relevant technical supervisors and leaders of the competent department. 2. In fact, it is necessary to strengthen the equipment management of hydrogen-handling systems; regular technical analyses and system leak inspections should be carried out to address issues such as hydrogen corrosion and hydrogen embrittlement in the equipment located under high-pressure hydrogen conditions. Upon identifying any issues, address them immediately to ensure everything is in good condition and meets the standards. 3. Before introducing hydrogen or purging a device or system with hydrogen, it must be purged and replaced using inert gases such as nitrogen or by using a water injection vent valve, until the system sample analysis shows satisfactory results. 4. It is strictly prohibited to release hydrogen inside the equipment and factory buildings. During purging, displacement, and venting to reduce pressure, venting must be carried out through the system’s flare network. When a large amount of hydrogen leaks and accumulates, the hydrogen supply must be cut off immediately, steam should be used for shielding or ventilation, and no operations that may generate sparks should be carried out. 5. When using hydrogen, the GB4962 \"Safety Technical Regulations for the Use of Hydrogen\" should be followed, and a system for conducting regular nighttime inspections with the lights turned off to check for hydrogen leaks and other issues should be established. 6. Units that purchase hydrogen should implement a strict quality inspection system for hydrogen upon arrival, conducting random sample analyses at a rate of 3% to 5% of the total quantity. If quality issues are detected, 100% sampling for analysis is required. 7. For hydrogen filling operations, a dedicated position should be assigned to oversee them, or relevant positions should be designated to take on this responsibility. Before starting work, the personnel involved must receive training on the flammable and explosive nature of neon gas as well as relevant safety techniques; only those who pass the examination are allowed to proceed with their tasks. 8. For the tubing connecting the hydrogen cylinder, copper pipes and copper fittings must be used; rubber products are strictly prohibited as substitutes. The interface valve connected to the electrolytic hydrogen tank should match the tank connected for initial hydrogen filling, and no more than five tanks should be used. If there are additional interface valves, wire plugs should be installed, and leak testing must show no leaks. 9. During the hydrogen filling process, collisions and impacts are strictly prohibited; hydrogen cylinders should not be placed near heat sources, and protection from sunlight is necessary in summer. 10. During the hydrogen filling process, when it is necessary to temporarily stop filling with hydrogen for various reasons, the oxygen compressor should be shut down, the inlet and outlet valves should be closed, or the buffer tank should be sealed to maintain a certain pressure. Before refilling with hydrogen, the hydrogen filling interface valve (pipe) should be purged with nitrogen; if the buffer tank cannot maintain a positive pressure, it as well must be purged and replaced until it meets the requirements.