Application of thin-walled stainless steel pipes

Stainless steel pipes are safe, reliable, hygienic, environmentally friendly, and economical. The thin-walled pipes and the successful development of new, reliable, simple, and convenient connection methods have given them more irreplaceable advantages than other pipes. They will be used more and more in engineering. , the use will become more and more popular, and the prospects are promising.
With the implementation of my country’s reform and opening up policy, the national economy was rapidly growing, and the construction of urban residences, public buildings, and tourist facilities in large quantities, put forward new requirements for hot water supply and domestic water supply. In particular, people pay more and more attention to water quality issues, and their requirements are constantly increasing. Galvanized steel pipes, a commonly used pipe material, will gradually withdraw from the stage of history due to its corrosive nature. Under the influence of relevant national policies, plastic pipes, composite pipes, and copper pipes have become common pipe materials in pipeline systems. However, in many cases, stainless steel pipes have more advantages, especially thin-walled stainless steel pipes with a wall thickness of only 0.6 to 1.2 mm. They have great advantages in high-quality drinking water systems, hot water systems, and water supply systems that put safety and hygiene first. Safe, reliable, hygienic environmentally friendly, economical, and applicable. It has been proven by domestic and foreign engineering practices that it is one of the new, energy-saving, and environmentally friendly pipes with the best comprehensive performance in water supply systems. It is also a very competitive water supply pipe that will play an important role in improving water quality and improving people’s living standards. Comparable effects.
In the building water supply piping system, since the glorious history of galvanized steel pipes has ended for a hundred years, various new plastic pipes and composite pipes have been developed rapidly. However, various pipe materials still have some shortcomings to varying degrees and are far from being fully suitable for water supply pipes. system needs and national requirements for drinking water and related water quality. Therefore, relevant experts predict that building water supply pipes will eventually return to the era of metal pipes. Based on foreign application experience, thin-walled stainless steel pipes are identified as one of the pipes with the best comprehensive performance among metal pipes.
(1) The time is ripe for the promotion and application of thin-walled stainless steel pipes in China
Thin-walled stainless steel pipes began to be produced and used in China in the late 1990s. They are a new generation emerging in the field of pipes. They have been widely used in building water supply and direct drinking water pipelines.
Thin-walled stainless steel pipes are durable and have been recognized by the engineering community, and relevant parties are working to reduce wall thickness and price to facilitate further promotion. Especially small-diameter stainless steel pipes are not expensive, so the supporting connection methods, reliability, and price of pipe fittings are the main factors that determine its development. Domestic developers in Sichuan, Guangdong, Zhejiang, Jiangsu, and other places have independently developed connection technologies and pipe fittings, which are pipe materials with great development prospects. 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, Guoke Shizi [2001] No. 71, on the promotion and application of “high diameter to wall ratio, high precision stainless steel medium, and high-pressure water supply pipes and supporting According to the notice “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 buildings in our country and improving and ensuring the quality of water supply.
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 for “Thin-walled Stainless Steel Water Pipes” was released 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, there are professional manufacturers in Sichuan, Guangdong, Zhejiang, Jiangsu, and other places producing thin-walled stainless steel pipes. The products have reached maturity, so the time has come for promotion and application.
(2) Domestic market prospects are promising
①There is a huge demand for building water supply pipelines
According to the “Ninth Five-Year Plan for the Construction Industry and the Outline of Long-term Goals for 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 construction areas was 400,000 km. Some people believe that the development of stainless steel water pipes is of great significance in improving the quality of modern urban buildings.
② Pipeline direct drinking water develops rapidly
With the development of the national economy, piped direct drinking water has developed rapidly in domestic cities such as Beijing, Shenzhen, Shanghai, and Chongqing, and economically developed medium-sized cities are also actively planning to catch up. When it comes to drinking water, stainless steel pipe systems are undoubtedly second to none. At present, all high-end hotels and public places in China have been equipped with or are in the process of configuring direct drinking water pipes.
③There is a bright future for domestic products to replace imports
To promote stainless steel pipes, my country has started to reduce wall thickness and cost since the 1990s to solve the technical problem of “high diameter to wall ratio and high precision” thin-walled stainless steel pipes, which has promoted the application of stainless steel pipes and developed rapidly. For a pipeline to be fully promoted 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.

(3) Stainless steel pipes have various connection methods
There are various connection methods for stainless steel pipes. Common pipe fitting types include compression type, compression type, union type, push type, push thread type, socket welding type, union flange connection, welding type and welding and traditional connection. Combined derived series connection methods. These connection methods have different application scopes according to their different principles, but most of them are easy to install, strong, and reliable. The sealing ring or gasket material used for the connection is mostly made of silicone rubber, nitrile rubber, and EPDM rubber that meet national standards, which relieves users from worries.