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2, a new type of radiator radiator heating, according to the different materials are divided into steel radiator, aluminum radiator, copper radiator, copper and aluminum composite radiator, steel and aluminum composite radiator, stainless steel radiator, etc.; by product Shape features are divided into column radiator (two-column, three-column, four-column), pipe-type radiator (single-row, double-row), wing-type radiator (double-sided fins, single-sided fins) , Fin-type radiator (circular fins, square fins), according to the cooling method is divided into radiation radiators, convection radiators and so on. Commonly-used new heating radiators are steel column radiators, steel row radiators, aluminum column airfoil radiators, and copper-aluminum composite airfoil radiators.
Due to the material's own characteristics, the aluminum alloy is resistant to acid and oxidation, but it is prone to alkaline corrosion; the steel has high strength and can withstand a certain degree of alkalinity, but is prone to oxidative corrosion; copper has good corrosion resistance and other comprehensive properties, but it is cured in water. Too much material or mixed copper will also corrode, and the mechanical strength of copper is low. The State requires aluminum alloy radiators and steel radiators with a wall thickness of 2.5 mm or less to be treated with internal anti-corrosion treatment and coated with anti-corrosion coating. The aluminum alloy radiator must use special non-metallic or bi-metallic composite pipe fittings. The aluminum thread is directly connected to the steel pipe to prevent electrochemical corrosion.
(B) understanding of the heating system In general, the steel radiator, can not be used in the open non-pressure boiler or steam heating system; aluminum radiator, can not be in the water quality of the PH value of the heating system or steam supply The use of thermal system; brass aluminum foil (copper-aluminum composite) radiator no special requirements on water quality, but the installation and use should be taken to avoid the header box copper pipe and wing copper pipe interface is subjected to excessive torque.
In addition to solving the district's heating system, it also needs to obtain a replacement permit from the real estate industry management department, because some communities are not allowed to replace radiators, and some districts only allow radiators of the specified materials.
(c) Estimate heating demand The calculation of how many watts of radiators should be installed in a home is more complicated, but it can be estimated at 45-70 watts per square meter.
In the estimation, factors such as buildings or bungalows, top or bottom, top or middle, north or south, urban or outdoor, and wall insulation should also be considered. After calculating the amount of heat dissipation, an additional 10-20% excess is appropriate. In addition, the consumer must provide basic data such as the diameter of the heating system interface used, the way in and out of the water.
(IV) Discerning the inner anti-corrosion layer At present, radiator salesmen must say “preservation†and provide a variety of certifications, which make consumers dazzled. However, in order to save costs, many manufacturers have eliminated some processing steps of the internal anti-corrosion coating, the surface treatment has failed to meet the requirements, and the coating thickness is not up to the standard. Therefore, many internally-coated heat sinks are currently marketed and soaked in hot water. On the 5th day or so, there was a large area of ​​foaming, the coating began to peel off, the heat sink substrate rusted, and one could imagine how its anti-corrosion performance would be. Therefore, consumers should choose carefully when choosing anti-corrosion radiators, and do not rely on the publicity of merchants. They can use the hand to check the internal waterway and check the anti-corrosion test report to comprehensively judge.
The quality of corrosion resistance is the key to selecting steel and aluminum radiators. When the consumer chooses, it depends on whether it is a professional anti-corrosion, but not on the price theory, the quality of the inner coating of a radiator that is too cheap is unqualified. The normal anti-corrosion material of the regular brand radiator is made by high pressure, no dead ends, bubbles, and good corrosion resistance; the internal anti-corrosion layer of the small brand radiator is filled by hand, there are dead corners, bubbles, etc., and the corrosion resistance is poor.
(5) Selection of high-quality accessories Radiator parts quality problems and installation material quality problems are one of the major causes of leakage of heating. Tianjin currently has some poor-quality plumbing fittings distribution centers. Some businesses, in order to save costs, purchase poor-quality plumbing fittings, which are prone to causing heating leaks and causing economic losses to consumers. Therefore, we should use the national quality plumbing fittings in the formal market.
Aluminum-plastic composite pipe is generally a pipe used for a radiator. The aluminum layer joint of an aluminum-plastic composite pipe has two kinds of overlap and butt joints, and the overlap is generally superior to the butt joint because the butt-proof aluminum layer has poor pressure resistance and is overlapped. Still and butt joints can be observed from the section of the aluminum-plastic composite pipe.
(6) Pay attention to the welding quality The different parts of the radiator are connected by welding. The quality of the welding directly affects the quality and service life of the radiator. The welding process mainly includes filler welding and body welding. Relatively speaking, the body welding has good corrosion resistance, and there is a uniform welding crucible without grinding; the filler welding has poor corrosion resistance and the surface is smooth and smooth. When consumers purchase, they mainly look at whether the welding is firm, whether the weld appearance is uniform, and whether there is unevenness. However, do not over-strengthen the smoothness of the weld seam because excessive sanding tends to reduce the strength of the weld area and cause run leaks.
(seven) look for well-known brand consumers to buy radiators must look for the brand, choose a regular brand radiator. The uneven market has directly caused the disorder of the industry and the market: products, spare parts are not qualified, installation is not standardized, materials and systems do not match and other issues continue to emerge. Therefore, consumers should choose the radiators of well-known brands in the formal market. In addition to quality assurance, there are also perfect installation and after-sale protection systems.
(8) The installation of after-sales service is the key to the quality of heating installation. If the positioning is inaccurate, the installation is not secure, the connection is not in place, and the screw connection is not standardized, it can easily lead to water leakage at the joint, or even runaway.
Radiator installation has strong technicality and should be carried out by a qualified professional installation team. At present, regular brands all have their own designated or contracted installation teams, and the installation quality is guaranteed.
After the radiator is installed, pressure detection must be performed to ensure that there is no leakage of the radiator itself and each mounting interface. After a pressure of 1.5 MPA is applied and the pressure is stable for 5 minutes, the test can be regarded as acceptable if the pressure does not drop, and consumers can rest assured. used.
Reminder:
Steel radiator must be filled with water; careful selection of styling radiator, it is prone to leakage, not heating and many other issues: "thin high profile" is not suitable for household heating, although this type of radiator save space, but Because higher radiators require larger water pressure, it is difficult to meet the requirements of separate-heating boilers. Therefore, it is better for households who prefer household heating, especially those living in high-rise buildings, not to choose such radiators.
In terms of installation, it is better to install the radiator when you paint the second floor paint, because it will inevitably contaminate the wall.
Eight Tips for Buying Emilia Radiators (1) Distinguish Material Characteristics 1. Conventional radiators Traditional heating radiators, represented by cast iron radiators and plate radiators.