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Stainless steel boost "12th Five-Year" to achieve green building, green building materials


Release time:

Sep 16,2011

A few days ago, the Ministry of Housing and Urban-Rural Development officially announced the "Twelfth Five-Year Development Plan for the Construction Industry" (hereinafter referred to as the "Plan"), which regards the development of green buildings and high-strength and high-performance building materials as the "Twelfth Five-Year" construction industry. Building energy-saving goals, which injects a strong impetus for the application of stainless steel in the construction industry. In the next five years, stainless steel will become a bright spot in the construction field. The "Plan" clarifies that during the "Twelfth Five-Year Plan" period, the total output value and added value of the national construction industry will increase by more than 15% annually, and the following building energy-saving goals are proposed: green buildings and green construction evaluation systems are basically established; construction process of building products Single

A few days ago, the Ministry of Housing and Urban-Rural Development officially announced the "Twelfth Five-Year Development Plan for the Construction Industry" (hereinafter referred to as the "Plan"), which regards the development of green buildings and high-strength and high-performance building materials as the "Twelfth Five-Year" construction industry. Building energy-saving goals, which injects a strong impetus for the application of stainless steel in the construction industry. In the next five years, stainless steel will become a bright spot in the construction field.

The Plan clearly states that during the 12th Five-Year Plan period, the total output value and added value of the national construction industry will increase by more than 15% annually, and the following building energy conservation targets are proposed: green building and green construction evaluation system are basically established; The energy consumption per unit added value in the construction process of building products decreased by 10%, the concrete consumption above C60 reached 10%, the steel consumption above HRB400 reached 45%, and the proportion of steel structure projects increased; the engineering design of new projects should meet the national building energy efficiency standards by 100, and the construction of new projects should meet the requirements of national building energy efficiency standards; the contribution rate of the whole industry to the resource-saving society has been significantly improved. The "Plan" encourages the use of advanced energy-saving and emission-reduction technologies and materials, and gradually increases the proportion of high-strength and high-performance building materials.

Industry insiders believe that the construction industry is an important pillar industry in China's national economy. During the "Eleventh Five-Year Plan" period, the added value of the construction industry accounted for about 6% of GDP, reaching 6.6 in 2010. In the "Twelfth Five-Year Plan", the total output value and added value of the construction industry will increase by more than 15% annually. With the implementation of the "Twelfth Five-Year Plan" in the construction industry, stainless steel will be very useful in the construction industry. This is because stainless steel has a long life, corrosion resistance, high strength, easy welding, recyclable and a series of advantages, is one of the best green building materials, in today's construction of many building materials in the increasingly prominent position, play an irreplaceable important role.

Industry market research shows that as early as the beginning of the last century, Europe first used stainless steel in the construction industry. At present, in some economically developed countries such as Europe and the United States, stainless steel is still an important part of the construction industry, and its annual consumption accounts for about 12% of the total consumption of stainless steel. In recent years, with the rapid development of China's construction industry, the application of stainless steel in the construction industry and landscape engineering is also more and more, especially with the implementation of the concept of green building in the construction industry, promote building energy conservation and emission reduction, the promotion and application of stainless steel in construction has become the development trend and direction of the construction industry.

Stainless steel in the construction industry is mainly used in doors and windows and other building decoration, building roofs and curtain walls, pipes, water tanks, kitchen utensils and other daily metal products. According to the statistics of China's stainless steel consumption structure, in China's stainless steel consumption, transportation accounted for 4%, building decoration accounted for 25%, kitchen utensils and other daily metal products accounted for about 40%, mechanical engineering accounted for 17%, household appliances accounted for 6%, other areas accounted for 8%. It can be seen that stainless steel consumed by everyday metal products such as building decoration and kitchen utensils accounts for a large proportion.

In building decoration, the steel quality of doors and windows has become a fashion, and in the steel doors and windows series, stainless steel with corrosion resistance, no pollution, high strength, no aging, no fading, simple construction, convenient maintenance and other characteristics is favored by consumers. Stainless steel can be made of railings, window frames, signs, lighting roof glass fixed parts, etc. As a new material, colored stainless steel is also widely used in the construction field. It is based on stainless steel cold-rolled sheet as raw material, through chemical or electrochemical treatment, on the surface of stainless steel to form a layer of high corrosion resistance of the oxide film, through the interference of light and the formation of different colors. The "Planning" also proposes to increase the proportion of steel structure projects, and the application of stainless steel in building steel structures has broad prospects. For example, stainless steel can be used as a structural material for cladding and curtain walls of buildings to make their appearance beautiful, while side walls, end walls and door panels require stainless steel plates with decorative patterns.

Water pipes and water tanks are also widely used in the construction industry. The water tank made of stainless steel has many characteristics such as no rust, no water leakage, no moss, clean and sanitary inner tank, convenient cleaning, etc., and is an ideal material for water storage. In today's green environmental protection has become the theme of today's life, stainless steel water tank is more and more optimistic. In some metropolises in China, the water supply department has made strict regulations on the selection of roof water tanks for new residential buildings. According to relevant personnel of the Shanghai Water Supply Company, in recent years, stainless steel water tanks have been used in nearly 100 newly built residential communities in Shanghai with good results. It is expected that in the next few years, stainless steel water tanks will become a new growth point for domestic stainless steel consumption.

Similarly, stainless steel water pipes are also a major area of application in the construction industry during the "Twelfth Five-Year Plan" period. This is because stainless steel water pipes have the advantages of corrosion resistance, sanitation, light weight, low maintenance, and long life. Stainless steel pipes have become increasingly popular in developed countries. The stainless steel pipes in Tokyo, Japan have reached more than 90%, and the number of pipe leaks has dropped from the original tens of thousands to 2 times/year to 3 times/year. The national standard ANSI/NSF61-1996a formulated by the US government in 1996 stipulates that only stainless steel and ductile iron pipes are allowed to enter the water supply pipes of high-rise buildings for metal pipes for drinking water. Stainless steel water pipes are preferred.

In recent years, some cities in China have also adopted stainless steel water pipes. As early as 2003, the Ministry of Construction of my country newly revised and issued national standards and specifications such as "Building Water Supply and Drainage Code", "Stainless Steel Clamped Pipe Fittings", "Building Water Supply Thin-walled Stainless Steel Pipeline Engineering Technical Specification", marking the stainless steel thin-walled pipe The application time is ripe. Shanghai has piloted drinking water to enter households directly, and stainless steel water pipes are the first choice for drinking water pipes. Stainless steel thin-walled pipes are also used for cold and hot water pipes and direct drinking pipes in Shanghai World Expo-related projects. A number of water supply pipe systems for high-grade commercial buildings have already adopted thin-walled stainless steel pipes and snap-fit fittings. Pipeline direct drinking water has developed rapidly in Beijing, Shenzhen, Shanghai, Chongqing and other cities, and economically developed medium-sized cities are also actively planning to catch up. At present, domestic high-grade hotels and public places have been equipped or are equipped with direct drinking water pipes. The application of stainless steel water pipes in the "Twelfth Five-Year Plan" construction industry will increase significantly, and the potential market is huge.

At the same time, the "Plan" proposes that during the "Twelfth Five-Year Plan" period, the amount of steel bars above HRB400 in the construction industry will reach 45% of the total amount. Then, in the future, stainless steel bars will be popularized and applied in the construction industry. In addition to corrosion resistance, stainless steel bars also have high yield strength, good toughness and ductility, and fatigue resistance. Stainless steel bars have been used in bridge construction. Some domestic steel mills have successfully trial-produced 316L, 2205, 2304 and other stainless steel threaded steel bars, and cooperated with the Highway Science Research Institute of the Ministry of Transport to carry out related application research, laying a foundation for stainless steel plates and stainless steel wires to enter roads, bridges and other industries. basis.

Industry experts believe that the main feature of stainless steel is a layer of self-healing chromium-rich oxide film on the surface of stainless steel, its excellent corrosion resistance not only makes stainless steel the first choice for building components, but also the best alternative material for carbon steel in reinforced concrete components. The use of stainless steel reinforcement in reinforced concrete structures can increase strength and resist the corrosion of embedded reinforcement by the harsh marine environment and chloride formed in the concrete. Corrosion-resistant stainless steel concrete is used on bridge decks, piers, docks, pile foundations, levees, mooring systems, moorings, gangways, and railings of many marine buildings. Stainless steel reinforced concrete structures are also used in urban infrastructure, such as overpasses. Compared with ordinary carbon steel, stainless steel upfront cost is higher, but from its good comprehensive performance and service life considerations or cost-effective. With the continuous development of society, in the future construction industry, stainless steel will gradually be widely used, and slowly replace the status of ordinary carbon steel.

During the "Twelfth Five-Year Plan" period, stainless steel will show its skills in the construction industry. People firmly believe that with the improvement of China's comprehensive national strength, as well as the expansion of stainless steel production scale, the improvement of product types and the improvement of quality, the application of stainless steel in the construction industry will open a new situation.