According to Ms. Liu, who has been distributing heating equipment for many years, geothermal heating, also known as “low-temperature radiant heating,†heats the floor by heating pipes, usually aluminum-plastic composite pipes or conductive pipes, and radiates the room evenly. Heat to achieve heating effect. Ordinary floors are not suitable for geothermal heating equipment and must use geothermal floors. At present, most floors on the market, such as bamboo flooring, ordinary solid wood flooring, and laminated wood flooring with a thickness of more than 8 mm, are not suitable for floor heating systems. Otherwise, they will affect heat conduction or cause floor deformation.
Wang Jian, the head of Dulwich Flooring, reminded consumers that special floor heating must meet stringent requirements. The substrate density is higher and the internal bond strength is better. The base material should be made of dense arbor wood, which has good thermal stability and can guarantee long-term no cracking or deformation under high temperature. The water-absorption thickness expansion rate should meet the standard of national excellent products. In addition, the amount of formaldehyde released should be low, because the higher the temperature, the greater the amount of formaldehyde released, and it is likely to exceed the standard when used in relatively closed residential areas in winter, and the heat transfer coefficient must reach the standard. Radiator is traditional and economical The radiator has also been continuously innovating from materials. Now there are not only cast iron radiators, but also various types of radiators such as steel, aluminum alloy and copper-aluminum composite. According to Sun Lijuan, a salesperson of heating equipment sales, regardless of the type of material, the radiators have their own advantages and disadvantages, and they can be selected according to the different needs of consumers.
Cast iron radiators are the most common type, with low prices and corrosion resistance. However, its appearance is stupid and it can no longer satisfy the inherent pursuit of modern homes. Due to its compact size, space-saving aluminum alloy radiators, and its low cost, many construction projects will choose this radiator. According to professionals, this type of radiator is prone to leakage due to pressure, and it is recommended to be used with caution in home decoration. Steel radiators come in all shapes and colors, and are installed in the interior as ornaments. Poor quality steel radiators can also cause corrosion or water leakage. Since the radiator's anti-corrosion technology cannot be seen from the outside, consumers try to choose high-quality products when they purchase. In addition, there is a copper-aluminum composite type radiator, which is a convection type radiator made of a combination of copper pipes and aluminum alloy profiles. However, this kind of radiator is rarely seen in the market. Due to the adoption of new materials, the price will be high. Out of the question.
In terms of heat dissipation, floor heating is better than radiators. Floor heating causes the hot air to diverge from low to high. When the surface temperature reaches 10°C or above, the human body will feel very comfortable. Even if you are sedentary, you will not feel cold legs and feet; and the radiator should reach 17°C or more. The body will feel warm. However, the installation of floor heating has more restrictions on the living room. If the room is not high enough, floor heating will reduce the height of the house, making the space smaller and making people feel depressed. In addition, since the piping of the floor heating equipment is under the floor, if there is a problem of infiltration, the treatment will be more complicated.
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It can be consolidated in the material, by its own thread, will be consolidated body [Drill-drill, extrusion,"out of the corresponding thread, make it close to each other.
Self tapping screw is a kind of screw with a drill bit, through the construction of special power tools, drilling, tapping, fixing, locking once completed. The self tapping screw is mainly used for the connection and fixing of some thin plate parts, such as the connection of Color Steel Plate and color steel plate, the connection of Color Steel Plate and Purlin, wall beam, etc. . Self-tapping Screws are often exposed to the outside world and have strong corrosion resistance of their own. The rubber sealing ring ensures that the screws are impervious to water and have good corrosion resistance.
Self tapping screws are usually described by three parameters: screw diameter series, number of threads per inch and screw length. There are 10 and 12 grades of screw diameter, the corresponding screw diameter is 4.87 mm and 5.43 mm, and the number of threads per inch is 14,16 and 24 grades. The more threads per inch, the stronger the self-drilling ability.
Tapping screws, self drilling screws,non metallic or softer metal
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