Application prospect of stainless steel pipe

Stainless steel pipe is an economical section steel and an important product in the steel industry. It can be widely used in life decoration and industry. Many people in the market use it to make stair handrails, window guards, railings, furniture, etc. Two common materials are 201 and 304.
It accounts for about 8% to 16% of the total amount of steel, and it is widely used in the national economy. Because the steel pipe has a hollow section, it is most suitable for conveying liquids, gases and solids; at the same time, compared with the round steel of the same weight, the steel pipe has a large section coefficient and high flexural and torsional strength, so it has become a variety of mechanical and architectural structures. important material. Structures and components made of stainless steel tubing have a greater section modulus than solid components for the same weight. Therefore, stainless steel itself is an economical section steel that saves metal. It is an important part of high-efficiency steel, especially in oil drilling, smelting and transportation industries. Industry, aircraft and automobile manufacturing, as well as boilers, medical equipment, furniture and bicycle manufacturing, also require large quantities of various steel pipes. With the development of new technologies such as atomic energy, rockets, missiles and aerospace industries, stainless steel pipes play an increasingly important role in the defense industry, science and technology and economic construction.
Stainless steel pipes are safe, reliable, hygienic, environmentally friendly, economical and applicable. The thin-walled pipes and the successful development of new reliable, simple and convenient connection methods make them have more irreplaceable advantages of other pipes, and their applications in engineering will be more and more. , the use will become more and more popular, and the prospects are promising.
Stainless steel is arguably unique among metals because it already possesses many of the desirable properties required of building materials, and its development continues. Existing types are constantly being improved to make stainless steel perform better in traditional applications, and new stainless steels are being developed to meet the stringent requirements of advanced architectural applications. Stainless steel has become one of the most cost-effective materials of choice for architects due to increasing productivity and quality.
Stainless steel combines performance, appearance and use characteristics, so stainless steel will remain one of the best building materials in the world.
With the implementation of China's reform and opening-up policy, the national economy has achieved rapid growth, and a large number of urban housing, public buildings and tourist facilities have been built, which has put forward new requirements for the supply of hot water and domestic water. In particular, the issue of water quality has been paid more and more attention by people, and the requirements have been continuously improved. Galvanized steel pipe, a commonly used pipe material, will gradually withdraw from the historical stage under the influence of relevant national policies because of its corrosiveness. Plastic pipes, composite pipes and copper pipes have become commonly used pipes in pipeline systems. However, in many cases, stainless steel pipes are more advantageous, especially thin-walled stainless steel pipes with a wall thickness of only 0.6 to 1.2 mm are used in high-quality drinking water systems, hot water systems and water supply systems that put safety and hygiene first. Safe and reliable, hygienic and environmentally friendly, economical and applicable. It has been proved by engineering practice at home and abroad that it is one of the best, new, energy-saving and environmentally friendly pipes in the water supply system. It is also a very competitive water supply pipe. comparable effect.
In the building water supply piping system, since galvanized steel pipes have ended a glorious history of a hundred years, various new plastic pipes and composite pipes have developed rapidly, but there are still some deficiencies in various pipes to varying degrees, and they are far from fully adapting to water supply pipes. The needs of the system and the national requirements for drinking water and related water quality. Therefore, relevant experts predict that the building water supply pipes will eventually return to the era of metal pipes. According to the application experience abroad, the thin-walled stainless steel pipe is identified as one of the pipes with the best comprehensive performance among the metal pipes.
Thin-walled stainless steel pipes, which were only produced and used in China in the late 1990s, are a newcomer in the field of pipes today, and have been widely used in pipelines for building water supply and direct drinking water.
Thin-walled stainless steel pipes are durable and have been recognized by the engineering community, and relevant parties are starting from reducing wall thickness and reducing prices to facilitate further promotion. Especially the small diameter stainless steel pipe, the price is not high, so the matching connection method, the reliability and price of the pipe fittings are the main factors that determine its development. Domestic developers in Sichuan, Guangdong, Zhejiang, Jiangsu and other places have independently developed connection technology and pipe fittings, which are very promising pipes. The Ministry of Construction and relevant departments also attach great importance to this new type of pipe. According to the China Technology Market Management Promotion Center, Guo Ke Shi Zi [2001] No. 71 document, on the promotion and application of "high-diameter-wall ratio high-precision stainless steel medium and high pressure water supply pipes and supporting According to the notice of "Pipe Fittings and Special Technology", the promotion and application of thin-walled stainless steel pipe technology and products are of great significance to improving the grade of modern Chinese buildings and improving and ensuring the water quality.
At the same time, the Ministry of Construction attaches great importance to the promotion and application of thin-walled stainless steel pipes. The industry standard of "thin-wall stainless steel water pipe" was issued and implemented in 2001. The relevant pipeline engineering technical regulations and installation atlas have been issued by the Ministry of Construction and are being compiled by Tongji University. At present, Sichuan, Guangdong, Zhejiang, Jiangsu and other places have professional manufacturers to produce thin-walled stainless steel pipes, and the products have matured. Therefore, the time for promotion and application has come.
Promising domestic prospects
① There is a large demand for water supply pipes in buildings
According to the "Ninth Five-Year Plan for Construction Industry" and the Outline of Vision in 2010, the annual demand for pipes from 2001 to 2010 was 500,000 to 600,000 km, of which the demand for hot and cold water pipes in residential building areas was 400,000 km. Some people think that the development of stainless steel water pipes is of great significance to improving the grade of urban modern buildings.
②The rapid development of pipeline direct drinking water
With the development of the national economy, piped drinking water has developed rapidly in domestic cities such as Beijing, Shenzhen, Shanghai, and Chongqing, and the economically developed medium-sized cities are also actively planning to catch up. In direct drinking water, stainless steel piping is undoubtedly second to none. At present, domestic high-end hotels and public places have been configured or are configuring direct drinking water pipes.
③The future of domestic substitution of imports is bright
In order to popularize stainless steel pipes, China has started from the aspects of reducing wall thickness and cost since the 1990s to solve the technical problems of thin-walled stainless steel pipes with "high-diameter-to-wall ratio and high precision", so that stainless steel pipes have been popularized and applied and developed rapidly. . For a pipeline to be fully popularized and applied, localization is indispensable. At present, some domestic manufacturers have the ability to produce and further develop thin-walled stainless steel pipes and fittings.