Mainstream products currently on the market is the steel radiators and copper and aluminum composite radiator, both of them accounted for almost 75% of the market share of the HVAC, steel radiator: modeling, high pressure, good thermal performance, affordable; copper and aluminum composite shape is simple and elegant, lightweight, heat the best and energy-saving., the selection of steel radiators What trick? look good steel radiator steel material from the material point of view is the use of low-carbon cold-rolled steel, a low carbon cold-rolled steel having a more superior than the ordinary steel pressure resistance and corrosion resistance, wherein the seamless steel pipe is one of the highest grade steel radiator raw materials. From the looks of high-quality steel radiator surface and smooth; wall structure is dense, uniform; easy machining. Inferior steel radiator recycled steel as raw materials, steel pipe rolled into steel radiator. Recycled steel impurities, hardness and poor defects, particularly in the welded parts, the impurities in the steel pipe in the heat generated during the welding process a precipitation phenomenon, resulting in the pipe wall appears small gap, under the action of the long high-temperature, high-pressure conditions of use, easily corrosion perforation, leading to the occurrence of radiator leakage phenomenon. Second look good steel radiator welding process used in the manufacture of welding process: laser welding, TIG, brazing, high-frequency welding. Wherein the laser welding is the most reliable. Obtained after the laser welding is the use of the laser beam focusing spot of the high power, a projection on the workpiece, so that the light energy into thermal energy of the molten metal welding. After welding, the workpiece contact portions fused into one. On the surface, the the good Heating smooth weld, welding slag accumulation. The inferior steel radiators in some small workshops factory welding process, welding process off, however, lead to the accumulation of a large number of welding slag welding surface, in order to achieve a smooth surface effect, small workshops factory often overly polished, resulting steel radiator weakened radiator pressure decrease in the thickness of the welded parts, lay hidden dangers for leaking accident. If you see a rough Heating weld, welding slag accumulation causes uneven surface, it must be inferior Heating. Top ten brands of Beijing radiator copper and aluminum composite radiator factory direct. Contact Person: the Tao Zefeng Phone: 4007005525 QQ: 860 357 491 copper and aluminum composite radiator heating is not: http://www.sllssrq.com/nuanqichanpin.asp?cnEm=gznqp: http://www.nuanqi.cc/?article- 54.html Daxing District, Crystal Square the Huatang Mall 1201