promote the use of brass impact of factors should be clarified to raise awareness of brass in the construction of water supply projects in the superiority of understanding, the cost performance of brass and accurate assessment of the country the past two years to promote the use of the brass Understand that it is necessary to promote the use of brass of the impact of the main factors to be clarified.
(1) brass is too expensive, and can afford it ?
According to the Shanghai Modern Architectural Design Group Ltd., and other units in March 2001 conducted a research project, entitled "Residential construction of various water supply pipe of technical and economic analysis and comparative study", subject to the PP-R pipe, PVC-U Pipe, Lining Plastic pipe and brass, and other representative and six pipe, in a just, fair and open principles, respectively, on Shanghai's multi-storey residential high-rise residential and conduct technical and economic comparison, the following table 1, Table 2 , The table is based on the "unified national budget for the installation of fixed", including the cost of pipe, tube, frame, valves, lead, sanitary ware, multi-storey high-rise residential outdoor section of a valve to start.
From the table that: brass system in multi-storey building in the total cost, the percentage accounted for only 3.24 percent in high-rise building in the percentage of lower cost, only 1.63 percent. Brass of the multi-storey building cost per unit area for 30.14 yuan, compared PP-R of only 4.35 yuan higher than that; brass of the high-rise building cost per unit area as 20.02 yuan, compared PP-R of only 3.61 yuan higher. Install brass will bring low maintenance costs, the advantages of long life, property management to meet the requirements. From the economic and technical performance for comprehensive comparison, the value of tens of thousands, hundreds of thousands of homes, the use of brass value for money. Concluded, the beginning of the Chinese people in the rich water supply system using affordable brass, brass will be more and more users of all ages.
(2) have a correct concept of the resources.
China's copper resources are not rich. Copper also included in the last national strategic materials. Seems to be used as a water supply is Taicaixiaoyong and waste. In fact, this is outdated concept. China has established a socialist market economy, has joined the WTO, there are both domestic and international markets. Copper on the international market is not indispensable. Over the past 10 years of domestic copper sales increased year by year, copper raw materials stocks also exceeded 100,000 tons, with the international market, showing a situation of oversupply. Therefore, the poor countries the concept of copper should not continue to be a resistance to promote the use of brass, with the globalization of resources, so that the supply of copper to meet the needs of the construction market, brass water entered the construction area is entirely possible, but also Proper time.
(3) Why Building Water use brass ?
Copper for building water supply project has a long history. Copper has become the preferred number of major construction pipe, is due to highlight the advantages of brass.
1 brass of the high reliability and safety. Copper-heat and cold, pressure, corrosion resistance and the characteristics and a fire-resistant, the scope of application of the environment. Copper can withstand extremely hot and extremely cold temperatures, -196 ℃ to 205 ℃, and adapt to the dramatic changes in temperature, will not have the aging phenomenon. Brass of the linear expansion coefficient of small, plastic tube is 1 / 10. Copper Tube closely with the management interface to connect firmly;
2 brass durable, life-long history has proved more than 100 years, with major buildings as long as life, or even longer;
3 brass can inhibit bacterial growth, and maintain drinking water sanitation. Copper is the metal inorganic materials - made of copper, the production process does not add any chemical composition, the water will not cause secondary pollution;
4 brass will not have aeruginosa. Pseudomonas is in the atmosphere of carbon dioxide and hydrogen sulfide and copper in the copper oxide formed on the surface of the complex salt, is the major components of basic copper sulfate and basic carbonate of copper, green, copper water pipes in the wall, the above material does not exist, Therefore, the brass could not produce aeruginosa;
5 Copper is the body of trace elements indispensable, in the general adult copper 70-100 mg. Copper is the body of proteins and enzymes components, many of the key enzyme, copper needs the participation and activating the body's metabolic processes, promote the body's many functions. Therefore, from brass copper in the drinking water intake is adequate |
