Stainless steel seamless steel tube application
Source: | Author:kanglongen | Publish time:2020-03-21 | 1492 Views: | Share:
Stainless steel pipes are safe, reliable, hygienic, environmentally friendly, and economically applicable. The thinning of the pipes and the development of new reliable, simple and convenient connection methods have made them more irreplaceable advantages of other pipes, and they will be used more and more in engineering. , The use will become more and more popular, the prospects are promising.

With the implementation of China's reform and opening-up policy, the national economy has grown rapidly, and a large number of urban houses, public buildings and tourism facilities have been constructed, which has set new requirements for hot water supply and domestic water supply. Especially with regard to water quality issues, people are paying more and more attention, and requirements are constantly increasing. Due to its corrosive nature, galvanized steel pipes will gradually withdraw from the historical stage under the influence of relevant national policies. Plastic pipes, composite pipes and copper pipes have become common pipes in pipeline systems. However, in many cases, stainless steel pipes are more superior, especially thin-walled stainless steel pipes with a wall thickness of only 0.6 ~ 1.2mm. In high-quality drinking water systems, hot water systems, and water supply systems that place safety and hygiene first, they have Safety and reliability, health and environmental protection, economical and applicable features. It has been proved by domestic and foreign engineering practices that it is one of the newest, energy-saving and environmentally friendly pipes with the best comprehensive performance of the water supply system. It is also a very competitive water supply pipe, which will definitely play a role in improving water quality and improving people's living standards. Comparable role.

In the building water supply pipe system, as the galvanized steel pipe has ended a century of glorious history, various new plastic pipes and composite pipes have developed rapidly. However, there are still some shortcomings in various pipe materials, which are far from fully adaptable to water supply pipes. System needs and national requirements for drinking water and related water quality. Therefore, relevant experts predict that the building water supply pipe will eventually return to the era of metal pipes. According to foreign application experience, thin-walled stainless steel pipe is identified as one of the best comprehensive performance among metal pipes.

(1) The time for the promotion and application of domestic thin-walled stainless steel pipes is mature. The domestic production and use of thin-walled stainless steel pipes began in the late 1990s. It is a newcomer in the field of pipe, and has been widely used in building water supply and direct drinking water. Of the pipeline. The thin-walled stainless steel pipe is durable and has been recognized by the engineering community, and relevant parties are starting to reduce wall thickness and price to facilitate further promotion. Especially for small diameter stainless steel pipes, the price is not high, so the supporting connection method, the reliability of the fittings and the price 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 promising pipes. The Ministry of Construction and related departments also attach great importance to this new type of pipe. According to China Technology Market Management Promotion Center and Guokeshizi [2001] No. 71 document, the promotion and application of "high-diameter wall ratio high-precision stainless steel medium and high pressure water supply pipes and supporting facilities" It was learned from the "Pipe Fittings and Special Technology" that the promotion and application of thin-walled stainless steel pipe technology and products is of great significance to improve the quality of modern buildings in China and improve and guarantee 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 issued and implemented in 2001. The relevant pipeline engineering technical regulations and installation drawings have been published by the Ministry of Construction and are being prepared by Tongji University. At present, there are professional manufacturers in Sichuan, Guangdong, Zhejiang, Jiangsu and other places to produce thin-walled stainless steel pipes. The products have matured. Therefore, the time for promotion and application has come.

(2) Good market prospects

① There is a large demand for water pipes in buildings
According to the "Ninth Five-Year Plan" of the construction industry and the 2010 Outline of Vision Goals, from 2001 to 2010, the annual demand for pipes is 500,000 to 600,000 kilometers, of which the demand for hot and cold water pipes in residential buildings is 400,000 kilometers. Some people think that the development of stainless steel water pipes is of great significance to improve the grade of urban modern buildings.

② The rapid development of drinking water directly from pipes
With the development of the national economy, direct drinking water in pipelines has developed rapidly in domestic cities such as Beijing, Shenzhen, Shanghai, and Chongqing, and economically developed middle-sized cities have also actively planned to catch up. In straight drinking water, stainless steel piping is undoubtedly second to none. At present, domestic hotels and public places have been equipped with direct drinking water pipes.

③ China has a bright future for alternative imports
In order to promote stainless steel pipes, China has begun to reduce wall thickness and reduce costs since the 1990s to solve the technical problem of thin-walled stainless steel pipes with "high diameter-to-wall ratio and high precision", which has promoted the application of stainless steel pipes and has developed rapidly. . For a pipeline to be fully popularized, localization is indispensable. At present, some domestic manufacturers have the ability to produce and further develop thin-walled stainless steel pipes and fittings.

(3) Various connection methods for stainless steel pipes

There are various connection methods for stainless steel pipes. Common types of pipe fittings are compression type, compression type, union type, push type, push thread type, socket welding type, union flange connection, welding type and welding. Combined derivation series connection. These connection methods have different application scopes according to different principles, but most of them are easy to install, firm and reliable. The material of the sealing ring or gasket used for the connection is mostly selected from silicone rubber, nitrile rubber, and ethylene-propylene-diene rubber that meet the requirements of national standards, eliminating the user's worries.