With the implementation of the reform and opening up policy, the national economy has achieved rapid growth, and the large-scale construction of urban residential, public buildings, and tourism facilities has put forward new requirements for the supply of hot water and domestic water. People are paying increasing attention to water quality issues and their demands are constantly improving. The emergence of stainless steel pipeline systems has brought more convenience to people's lives.
The commonly used galvanized steel pipes have gradually withdrawn from the historical stage due to their corrosiveness. Plastic pipes, composite pipes, and copper pipes have become commonly used pipes in pipeline systems. In many cases, stainless steel pipes have more advantages, especially thin-walled stainless steel pipes with a wall thickness of only 0.6-1.2mm. They have the characteristics of safety, reliability, hygiene, environmental protection, and economic applicability in high-quality drinking water systems, hot water systems, and water supply systems that prioritize safety and hygiene. They have been proven by domestic and foreign engineering practices to be one of the best comprehensive, new, energy-saving, and environmentally friendly pipes in water supply systems.
At present, the application of stainless steel pipes is being promoted in water systems around the world. In addition, homes, office buildings, and medical centers also use stainless steel pipes because in these places, the purity and safety of water must be considered first.
The application of thin-walled stainless steel pipes in foreign countries began in the 1960s, and developed countries have also been widely used in building water supply and water treatment systems. Britain, Germany, the United States, and Japan all have standards for rusted steel pipes, as well as ISO and DIN standards. The ANSI/NSF611997a national standard/National Health Fund international standard developed by the United States under the Water Purification Act has been confirmed by the World Health Organization. The pipes and system components of the current drinking water system also use the above standards as a basis for health assurance. The first batch of materials that meet the requirements of this standard include ANSI 304304L, 316, and 316L.
In Europe and America, more and more buildings and houses are using stainless steel pipes. They use 316l on high-temperature and cooling water system equipment, and use pressure connection methods to quickly and safely install stainless steel pipes and pipes. The water supply system at the Detroit Arena in the United States, including direct drinking water pipes at each sales point, uses 304 stainless steel pipes. After more than a decade of experimentation, the buried water treatment main pipeline in the Karlskoga market in Sweden has been replaced by 316 stainless steel pipes. At present, stainless steel pipes have become the standard material for over 1600 newly built urban wastewater treatment plants (WWTPs) in the United States.
Japan began installing and using stainless steel pipes in buildings as early as the early 1970s due to the continuous deterioration of drinking water quality in the pipeline network. Then it was extended to the underground water supply pipeline in the 20 years after 1980, and the Tokyo area was updated to a water pipe. Recently, over 80% of residents have replaced the original inlet pipe (the connecting pipe between residents and the main pipeline) with stainless steel pipes, thereby reducing the water delivery rate of the pipeline network by 7.7 and saving water resources. In addition, it is also widely used in water treatment plants, water pipe bridges, and bridge bridges.
In the construction water supply pipeline system, galvanized steel pipes have ended their century long glorious history, and various new types of plastic pipes and composite pipes have also developed rapidly. However, various pipes "still have some shortcomings, far from fully meeting the needs of the water supply pipeline system and the country's requirements for drinking water and water quality." Therefore, experts predict that the materials of construction water supply pipes will eventually return to the era of metal pipes, and based on foreign application experience, thin-walled steel pipes in metal pipes will be determined as one of the pipes with the best comprehensive energy.
The promotion and application time for thin-walled stainless steel pipes in China has arrived:
The durability of ultra-thin stainless steel pipes has been recognized by the engineering community. Developers in Sichuan, Guangdong, Zhejiang, Jiangsu and other regions in China have independently developed connection technology and pipeline engineering, making them very promising pipes. There are professional manufacturers producing ultra-thin stainless steel pipes in Sichuan, Guangdong, Zhejiang, Jiangsu and other places, and the products are mature. Therefore, the time has come for the promotion and application of ultra-thin stainless steel pipes in China.
According to the "Ninth Five Year Plan" for the construction business and the 2010 Vision Goal Plan, it is estimated that the pipeline demand between 2001 and 2010 will be 500000 to 600000 km, of which the demand for cold and hot water pipes in residential buildings will be 400000 km. The development of stainless steel water pipes is of great significance for improving the level of modern urban architecture.
With the development of the national economy, direct drinking water pipelines in cities such as Shenzhen and Shanghai have developed rapidly. Economically developed medium-sized cities are also actively planning and catching up. In direct drinking water, the stainless steel pipe series is undoubtedly leading.
At present, some domestic enterprises have the ability to produce and further develop thin-walled stainless steel pipes and tubes. They have independently developed live joint connection technology and products such as pipes. Reliable technology, further reducing costs. This has created extremely favorable conditions for the promotion, application, and development of thin-walled stainless steel pipes.
