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Product description: Hydrogen is a colorless, odorless, non-toxic, and flammable gas at normal temperature and pressure. The isotopes of hydrogen found in nature are protium, deuterium, and tritium. Its explosive limit in air is 4.0%–74.2%, the ignition temperature is only 400°C, and the flame color is blue. Hydrogen is a gas that is difficult to liquefy; at 1 atm, it turns into liquid hydrogen at -252.87°C ； -It solidifies into solid hydrogen at 259.1°C. Currently, the industrial production of hydrogen mainly involves several methods, including hydrogen production through water electrolysis, methanol cracking, natural gas cracking, and ammonia decomposition. There are four methods available for the storage and transportation of hydrogen, namely gaseous storage and transportation, liquid storage and transportation, metal hydride storage and transportation, and microsphere storage and transportation. Hydrogen is mainly transported in steel cylinders, groups of steel cylinders, and hydrogen pipeline tankers. Hydrogen is the lightest gas known in the world; its density is extremely low, at only 1/14 that of air. That is, at standard atmospheric pressure and 0°C, the density of hydrogen is 0.0899 g/L. Therefore, hydrogen can be used as a filling gas for airships (however, due to its flammability and lower safety level, helium is now more commonly used for filling airships). Hydrogen-filled latex balloons often stop floating after just one night, as hydrogen can pass through the tiny, invisible pores in the rubber. Applications of hydrogen: Hydrogen is widely used in the petrochemical industry, particularly in hydroprocessing processes. It serves as a clean fuel, as its combustion product is water, resulting in no environmental pollution. High-purity hydrogen is commonly used as a carrier gas in well-known gas chromatographs such as those made by Agilent, Shimadzu, and Thermo Electric. It is also used as a protective gas in the production of float glass. High-purity hydrogen is employed for the reduction combustion of filaments. Mixtures of high-purity hydrogen and high-purity nitrogen are used for the bright annealing of metals such as stainless steel and copper pipes. Hydrogen is utilized for the hydrogenation reduction of oils such as food oils. Liquid hydrogen and liquid oxygen are used together as rocket propellants. Note: Bottled hydrogen is a flammable compressed gas; it should be stored in a cool, well-ventilated warehouse, with clear signs indicating “No Smoking”. The temperature inside the warehouse should not exceed 40°C. Protect from direct sunlight. Hydrogen should be stored separately from oxygen**, toxins, radioactive materials, peroxide-containing organic substances, and other flammable materials. Facilities such as lighting and ventilation in warehouses should be of explosion-proof type. When transporting hydrogen gas cylinders, special cylinder trolleys or hazardous materials transport vehicles should be used to prevent the cylinders from colliding or being damaged. The cylinder neck bears the inspection date of the cylinder; expired cylinders should be reported to Spuyer Gas so that they can be taken to the appropriate pressure vessel inspection facility for inspection. Gas cylinders must be retired compulsorily after 30 years of use. Hydrogen in steel cylinders is a high-pressure compressed gas; before use, the gas pipelines must be pressure-tested and leak-tested to ensure there are no leaks. It should be used after being depressurized using hydrogen pressure regulators such as YQQ-352 or 152H-125. When each hydrogen cylinder is used up to the point where exhaust gas is produced, the remaining pressure inside the cylinder should be maintained at 0.5 MPa; it must not be lower than 0.25 MPa. The cylinder valve should be closed to ensure the quality of the gas and safety in its use. Bottled hydrogen should be stored and handled in a classified manner during transportation and use. Flammable gases must not be stored together with oxidizing gases; they should also be kept away from open flames and heat sources. It is necessary to avoid exposing them to fire, oils or waxes, direct sunlight, heavy handling, or impacts. Arcing or electrical discharges on the gas cylinders are strictly prohibited, as is rough handling during loading and unloading.