Recently, the relevant members of the China National Hardware Association for the first time recently in the gas water heater industry staged the "aluminum to copper dispute" to the public to express their opinions on the matter, to encourage corporate technological innovation, and hope that other companies do not make comments, It is necessary to jointly create a healthy ecological environment for the water heater industry. According to Liu Runfeng, deputy secretary-general of the China National Hardware Association and the general manager of the gas appliance branch, the aluminum alloy heat exchanger is currently one of a variety of materials used in gas water heaters. Enterprises can use their own conditions and meet the requirements of national standards. , Adhere to the principle of quality ahead, to choose their own product positioning. "What we call aluminum substitute copper is not what people think of as pure aluminum. It is an aluminum alloy that incorporates titanium." Prof. Wu Guofu of the School of Urban Construction and Environmental Engineering of Chongqing University told the reporter that the melting point of the alloy will change because of the different materials added. The melting point of the material used in the current product is between 650 degrees Celsius and 700 degrees Celsius, although there is no melting point of copper. High, but it also fully meets the requirements of national standards. There is a saying that the current water heater products, the temperature of the high-temperature flue gas at the inlet of the heat exchanger has reached about 1000 degrees Celsius, and the melting temperature of the copper material is quite much higher than the melting point of pure aluminum, so the aluminum substitute copper is not safe, In this regard, Zhang Mingwei, director of inspection of the National Gas Appliance Quality Supervision and Inspection Center, said that the temperature of the high-temperature flue gas at the inlet of the heat exchanger reached a temperature of 1000 degrees Celsius is only an extreme case. He said that the requirements for heat-resistant materials at 500 degrees in the national standard are actually much higher than the actual operating temperature of the product. Since gas water heaters work with water, their operating temperatures are mostly between 110 degrees Celsius and 260 degrees Celsius. The temperature of high-temperature flue gas may indeed reach 1,000 degrees Celsius. However, this is mainly caused by dry burning due to unreasonable product design. It is not related to the selected material. If this happens, it should not be aluminum or copper. The same will be burned. Ceiling Roses/Ceiling Medallions
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Water heater aluminum substitute copper hardware association encourages technological innovation