Gas water heater aluminum on behalf of the copper is progressive or regressive?
Gas water heater
Recently created a hubbub. Hot object is its original copper heat exchanger replaced with aluminum. Physical properties of aluminum than copper, copper replaced aluminum many fear will cause people to safety, it was said that it was only manufacturers to reduce costs to market on behalf of the copper aluminum water heater. Gas water heaters have been using copper heat exchanger, if used as copper instead of aluminum, there is presumably the reason is not only to reduce costs that simple.
Aluminum tank lead to controversy
Rise of raw materials this year, many
Home Appliances
Costs of products has also risen. Some enterprises to reduce costs, the home appliances using an alternative material. As part of the water heater tank gas water heater manufacturers have a "copper" materials with "aluminum" material instead of, this change immediately led to multiple disputes.
It is understood that gas water heater tank is called the heat exchanger, gas water heaters are the core components. In the eighties and nineties of last century, in charge of the Ministry of Light Industry gas water heater has clearly forbids the use of aluminum as a gas water heater tank materials used. But in 2001 the State published material standard tank gas water heater, no provision can not use aluminum.
Because there is no requirement, thus making some companies to use lower cost than copper for aluminum as a substitute. However, the physical properties of aluminum than copper, such as heat resistance, corrosion resistance, especially the melting point, the water heater for this is the most important. It is understood that the melting point of copper about 1000 , the melting point of aluminum about 660 , far below the melting point of copper, if the use of "aluminum" instead of "copper" may give people a security risk.
However, in the selection of "aluminum" material as a gas water heaters, new materials, these companies have already taken into account the national standard aluminum and gas water heater between. Domestic gas water heater in accordance with standard requirements, water heater tank material should be resistant 500 temperature, the melting point of aluminum is higher than the standard, can meet this requirement, which is standard, in theory, there is no safety hazard issue. Is precisely this point, aluminum for copper is possible.
But experts say the actual application, the water heater temperature in the tank had reached the entrance to about 1000 , and the copper melting temperature, and higher than the melting point of aluminum, with this standard if the display is inappropriate. And now the international gas water heater with a copper water tank basically, it has a certain representation of the application from several years can also be seen that it is safe and reliable. But the aluminum tank is still a relatively unknown product, the indicators also need to identify and market testing professional, especially as this relates to the personal safety of water heater products, more stringent tests required to put on the market, but the market appears aluminum water heater has a save this important.
Thus see the emergence of aluminum gas water heater manufacturers to lower cost introduced to the market, a move has not been market tested and universally accepted, the most important feature is the aluminum itself is less than copper, so people Can it replace the copper produced a question, but it is consistent with national standards for gas water heater, which helps people to question the national standards, national standards are not also need to improve it?
Insufficient copper
, Of course, aluminum gas water heater had just appeared on the market not long, or market-position main copper gas water heater. Superior physical properties of copper make it a gas water heater the main material, the time that it is a very mature quality materials. But now, the copper is not necessarily reliable.
Present in the domestic gas water heater market, gas water heater's heat exchanger is usually oxygen-free copper, oxygen-free copper content of up to 99%, is an ideal copper. The use of oxygen-free copper heat exchangers are usually more expensive, some high-end gas water heaters only use oxygen-free copper as the material. Some businesses to cut costs, do not use high-quality oxygen-free copper, but copper lead with a dip.
I am China Hardware Suppliers writer, reports some information about large cuff blood pressure monitors , talking blood pressure monitors.
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