To buy radiators, you must first understand the condition of the HVAC market. According to expert figures of the exclusive radiators, the current mainstream products on the market are steel radiators and copper-aluminum composite radiators. Both of them account for almost 75% of the HVAC market share. The favored are steel radiators that are easy to install, use and maintain. So what's wrong with picking up a steel radiator?
Experience A look at a steel material with a good steel radiator is based on the material point of view is the use of low-carbon cold-rolled steel, low-carbon cold-rolled steel has superior pressure resistance and corrosion resistance than ordinary steel, wherein the seamless steel pipe is At present, the highest grade steel radiator raw materials. From the aspect of appearance, the surface of the radiator made of high quality steel is smooth; the wall structure is dense and uniform; it is easy to carry out machining. Inferior steel radiators use recycled steel as raw materials and are hot-rolled into steel tubes as steel radiators. Recovered steel has many defects such as impurities and poor hardness. Especially at the welding site, impurities in the steel pipe are precipitated during the welding process, resulting in fine gaps in the steel pipe wall. Under long-term high-temperature and high-pressure conditions, it is easy to use. Perforation occurs, resulting in leakage of the radiator.
The second experience to see the welding process of a good steel radiator for the manufacturing of welding processes are: laser welding, argon arc welding, brazing, high frequency welding and so on. Among them, laser welding is the most reliable. Laser welding is the use of a high-power spot obtained after focusing with a laser beam, projected on the workpiece, so that the light energy becomes a thermal energy melting metal welding. After welding, the contact parts of the workpiece are welded together. On the surface, good welding seams are smooth and there is no accumulation of slag. In the welding process of some small workshop radiators in some small workshops, due to the poor welding procedure, a large amount of welding slag is deposited on the welding surface. In order to achieve smooth surface effects, small workshop factories often use excessive grinding methods. The thickness of the steel radiator is weakened at the welded part, and the pressure resistance of the radiator is reduced, causing hidden troubles for leaking accidents. If you see rough heating joints, welding slag accumulation leads to uneven surface, it must be poor heating. Experience 3: Look inside the anti-corrosion.
At present, there are three kinds of inner coating anti-corrosion coatings commonly used in the radiator market: the first coating is organic coating, and the YDR-2 type acrylic modified resin coating developed by the Beijing General Research Institute of Nonferrous Metals is widely used in the market. The coating can effectively prevent the oxygen in the hot water from contacting with the steel pipe, eliminate the occurrence conditions of the oxidation corrosion reaction, and play an anti-corrosion effect. The second category is inorganic coatings. The representative of zinc-based chromium salts is that the coating and the substrate are chemically bonded at high temperatures, and have strong adhesion and are not easily peeled off. The process requirements are very strict, and the quality of the coating can be guaranteed by strictly controlling the various process parameters, and the pretreatment effect of the radiator surface can be ensured. The third type is a double coating. Its process is that the first layer of coating (silver grey) is zinc-chromium inorganic coating, which is sintered and solidified in an oven above 320°C. It is tightly bonded to the substrate and has strong adhesion and will not peel off. The second coating layer (red) is an organic resin coating. After being cured at a high temperature of 180° C., the coating serves to seal the pores that may be present in the first coating layer, and prevents water from penetrating the substrate surface through the pores. The two coatings are tightly integrated and protected by double layers, making the radiator more resistant to corrosion and safer. In addition, consumers should also understand that, in order to allow consumers to have an intuitive understanding of the internal anti-corrosion coating, the general large radiator manufacturers will have a profile of the finished heat sink printed with the company's logo for consumer identification. The color of a good inner anti-corrosion coating is generally black or gray. In the process of processing the internal anti-corrosion process, the inferior radiator is used to replace the special anti-corrosion coating with low-cost anti-rust paint in order to achieve the purpose of cutting corners. Once the high-temperature water scours, the anti-rust paint peels off and the result does not reach the anti-corrosion effect.
Experience four surface treatment of the surface of the steel radiator with a good surface treatment of the use of "spray process" technology, it takes the advanced dry spraying process, plastic powder electrostatic spraying operations, so that the radiator surface smooth, colorful. Consumers look at the surface of the spray coating uniform, smooth, there will be no ripple-like protrusions, will not appear "orange peel" phenomenon, Yingguang will give off a natural luster; UV plastic powder can be in the sun for a long time The color stability is maintained under the conditions. With ultraviolet light does not fade, high temperature conditions do not crack and so on. Inferior radiators use inexpensive indoor plastic powders to treat the surface of steel radiators. There are defects on the surface, the coating is uneven, the colors are not stable, and the whole set of radiators are unevenly colored. The people are commonly called "flowers and melons." The phenomenon cannot be continued at all. In addition, after the sun shines, there will be fading, coating cracking and so on. At present, there are more than 2,100 formal heating radiator manufacturers in China. However, there are only a hundred or more production enterprises in the upper-scale and higher-grade industries. There are not many enterprises focusing on quality and brands, such as Beijing Sunde, Shanghai Nuoro, Qingdao Aucma, and Gansu Haoxing, such as “loose†and “workshopâ€. Small businesses still account for the majority. Under the condition that the heating radiator product use environment and production technology are "inherently inadequate", there are still many problems in the production standard setting and industry management. On the one hand, the standard lags behind, there is no unified industry standard, and there is no national standard. There is no uniform standard for the inspection method. What is more, some companies have reduced the thickness of materials to half or more of the standard in order to reduce costs. Once this kind of product breaks down, it will cause an explosion and the consequences will be disastrous.
Experience A look at a steel material with a good steel radiator is based on the material point of view is the use of low-carbon cold-rolled steel, low-carbon cold-rolled steel has superior pressure resistance and corrosion resistance than ordinary steel, wherein the seamless steel pipe is At present, the highest grade steel radiator raw materials. From the aspect of appearance, the surface of the radiator made of high quality steel is smooth; the wall structure is dense and uniform; it is easy to carry out machining. Inferior steel radiators use recycled steel as raw materials and are hot-rolled into steel tubes as steel radiators. Recovered steel has many defects such as impurities and poor hardness. Especially at the welding site, impurities in the steel pipe are precipitated during the welding process, resulting in fine gaps in the steel pipe wall. Under long-term high-temperature and high-pressure conditions, it is easy to use. Perforation occurs, resulting in leakage of the radiator.
The second experience to see the welding process of a good steel radiator for the manufacturing of welding processes are: laser welding, argon arc welding, brazing, high frequency welding and so on. Among them, laser welding is the most reliable. Laser welding is the use of a high-power spot obtained after focusing with a laser beam, projected on the workpiece, so that the light energy becomes a thermal energy melting metal welding. After welding, the contact parts of the workpiece are welded together. On the surface, good welding seams are smooth and there is no accumulation of slag. In the welding process of some small workshop radiators in some small workshops, due to the poor welding procedure, a large amount of welding slag is deposited on the welding surface. In order to achieve smooth surface effects, small workshop factories often use excessive grinding methods. The thickness of the steel radiator is weakened at the welded part, and the pressure resistance of the radiator is reduced, causing hidden troubles for leaking accidents. If you see rough heating joints, welding slag accumulation leads to uneven surface, it must be poor heating. Experience 3: Look inside the anti-corrosion.
At present, there are three kinds of inner coating anti-corrosion coatings commonly used in the radiator market: the first coating is organic coating, and the YDR-2 type acrylic modified resin coating developed by the Beijing General Research Institute of Nonferrous Metals is widely used in the market. The coating can effectively prevent the oxygen in the hot water from contacting with the steel pipe, eliminate the occurrence conditions of the oxidation corrosion reaction, and play an anti-corrosion effect. The second category is inorganic coatings. The representative of zinc-based chromium salts is that the coating and the substrate are chemically bonded at high temperatures, and have strong adhesion and are not easily peeled off. The process requirements are very strict, and the quality of the coating can be guaranteed by strictly controlling the various process parameters, and the pretreatment effect of the radiator surface can be ensured. The third type is a double coating. Its process is that the first layer of coating (silver grey) is zinc-chromium inorganic coating, which is sintered and solidified in an oven above 320°C. It is tightly bonded to the substrate and has strong adhesion and will not peel off. The second coating layer (red) is an organic resin coating. After being cured at a high temperature of 180° C., the coating serves to seal the pores that may be present in the first coating layer, and prevents water from penetrating the substrate surface through the pores. The two coatings are tightly integrated and protected by double layers, making the radiator more resistant to corrosion and safer. In addition, consumers should also understand that, in order to allow consumers to have an intuitive understanding of the internal anti-corrosion coating, the general large radiator manufacturers will have a profile of the finished heat sink printed with the company's logo for consumer identification. The color of a good inner anti-corrosion coating is generally black or gray. In the process of processing the internal anti-corrosion process, the inferior radiator is used to replace the special anti-corrosion coating with low-cost anti-rust paint in order to achieve the purpose of cutting corners. Once the high-temperature water scours, the anti-rust paint peels off and the result does not reach the anti-corrosion effect.
Experience four surface treatment of the surface of the steel radiator with a good surface treatment of the use of "spray process" technology, it takes the advanced dry spraying process, plastic powder electrostatic spraying operations, so that the radiator surface smooth, colorful. Consumers look at the surface of the spray coating uniform, smooth, there will be no ripple-like protrusions, will not appear "orange peel" phenomenon, Yingguang will give off a natural luster; UV plastic powder can be in the sun for a long time The color stability is maintained under the conditions. With ultraviolet light does not fade, high temperature conditions do not crack and so on. Inferior radiators use inexpensive indoor plastic powders to treat the surface of steel radiators. There are defects on the surface, the coating is uneven, the colors are not stable, and the whole set of radiators are unevenly colored. The people are commonly called "flowers and melons." The phenomenon cannot be continued at all. In addition, after the sun shines, there will be fading, coating cracking and so on. At present, there are more than 2,100 formal heating radiator manufacturers in China. However, there are only a hundred or more production enterprises in the upper-scale and higher-grade industries. There are not many enterprises focusing on quality and brands, such as Beijing Sunde, Shanghai Nuoro, Qingdao Aucma, and Gansu Haoxing, such as “loose†and “workshopâ€. Small businesses still account for the majority. Under the condition that the heating radiator product use environment and production technology are "inherently inadequate", there are still many problems in the production standard setting and industry management. On the one hand, the standard lags behind, there is no unified industry standard, and there is no national standard. There is no uniform standard for the inspection method. What is more, some companies have reduced the thickness of materials to half or more of the standard in order to reduce costs. Once this kind of product breaks down, it will cause an explosion and the consequences will be disastrous.
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