Stainless steel pipe is an economic section steel, is an important product in the steel industry, can be widely
Used in life decoration and industry, many people in the market for making stair handrails, window guards, railings, furniture, etc.. Commonly available in 201 and 304.
It accounts for about 8% of the total steel and 16% of the total steel, which is used in the national economy in an extremely wide range of applications. Because of the steel pipe has a hollow section, and therefore suitable for liquid, gas and solid transport pipeline; at the same time with the same weight of round steel, steel pipe section coefficient, bending and torsion strength, so also become a variety of machinery and building structure on the important material. Structures and components made of stainless steel tubes have a larger cross-sectional modulus than solid parts under equal weight. Therefore, the stainless steel tube itself is a kind of metal-saving economic section steel, it is an important part of steel, especially in the oil drilling, smelting and transmission industries are in greater demand, followed by geological drilling, chemical industry, construction industry, machinery industry, aircraft and automobile manufacturing, as well as boilers, furniture and bicycle manufacturing also need a large number of various steel tubes. With the development of new technologies such as atomic energy, rockets, missiles and space industry, stainless steel pipe in the defense industry, science and technology and economic construction is becoming more and more important.
Stainless steel pipe is safe, reliable, sanitary and environmentally friendly, economical, thin-walled pipes and new reliable, simple and convenient connection methods developed successfully, so that it has more irreplaceable advantages of other pipes, the application of engineering will be more and more, the use will become more and more popular, the prospects are good.
And its development is still continuing. In order to make stainless steel in the traditional application of better performance, has been improving the existing types, and, in order to meet the stringent requirements of high-grade construction applications, is developing new stainless steel. Due to increasing production efficiency and improving quality, stainless steel has become one of the cost-effective materials of choice for architects.
Stainless steel combines performance, appearance and use characteristics, so stainless steel will continue to be one of the world’s good building materials.
With the implementation of China’s reform and opening-up policy, the national economy has gained rapid growth, urban residential, public buildings and tourism facilities are built in large numbers, the hot water supply and domestic water supply has put forward new requirements. In particular, water quality is becoming more and more important and the requirements are increasing. Galvanized steel pipe, a common pipe due to its easy corrosion, will gradually withdraw from the historical stage under the influence of relevant policies, plastic pipe, composite pipe and copper pipe into the common pipe of the piping system. But in many cases, stainless steel pipe is more superior, especially the wall thickness of only 0.6 ~ 1.2mm thin-walled stainless steel pipe in high-quality drinking water system, hot water system and will be safe, sanitary water supply system in the first place, with safe and reliable, health and environmental protection, economic and other characteristics. Has been proven by domestic and foreign engineering practice is a good comprehensive performance of the water supply system, new, energy-saving and environmentally friendly pipe, is also a very competitive water supply pipe material, will play an incomparable role in improving water quality, improve people’s living standards.
In the building water supply system, as galvanized steel pipe has ended a hundred years of glorious history, a variety of new plastic pipes and composite pipes have been rapidly developed, but a variety of pipes still have some shortcomings in varying degrees, far from fully adapt to the needs of the water supply system and the requirements of drinking water and related water quality. Therefore, the relevant experts predicted that: the building water supply pipe material will eventually return to the era of metal pipe. According to the foreign application experience, in the metal pipe identified thin-walled stainless steel pipe for the comprehensive performance of one of the good pipe.
Promotion
Thin-walled stainless steel pipe, domestic production and use in the late 1990s, is the new generation of emerging in the field of pipe, has been used in large quantities in the building water supply and direct drinking water pipeline.
Thin-walled stainless steel pipe durable, has been recognized by the engineering community, and the relevant parties are reducing the wall thickness, reduce prices to facilitate further promotion. Especially small diameter stainless steel pipe, the price is not high, so the supporting connection method, the reliability of the fittings and price is the main factor in determining its development. Domestic developers in Sichuan, Guangdong, Zhejiang, Jiangsu and other places have developed their own connection technology and fittings, is a very promising pipe development. The Ministry of Construction and related departments also attach great importance to this new pipe, according to the Chinese Technology Market Management Promotion Center, National Science and Technology City word [2001] No. 71 document, on the promotion and application of “high diameter wall ratio high-precision stainless steel water pipe and supporting fittings and special technology” notice was informed that the thin-walled stainless steel pipe technology and products The promotion and application of this technology and products to improve the grade of China’s modern buildings, improve and protect water quality are of great significance.
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-walled stainless steel water pipe” was released in 2001. Related pipeline engineering technical regulations and installation atlas, the Ministry of Construction has issued a document, is responsible for the preparation of Tongji University. Currently, Sichuan, Guangdong, Zhejiang, Jiangsu and other places have professional manufacturers of thin-walled stainless steel pipe production, the product has tended to mature, thus, the time has come to promote the application.
Domestic prospects are good
① building water supply pipeline demand
According to the “building business” Ninth Five-Year Plan and 2010 Visionary Goals Outline “estimates, 2001 to 2010, the annual demand for pipes for 50 ~ 600,000 km, including residential buildings within the hot and cold water pipe demand for 400,000 km. grade, is of great significance.
② Pipeline direct drinking water is developing rapidly
With the development of the national economy, pipeline direct drinking water in the domestic cities of Beijing, Shenzhen, Shanghai, Chongqing and other cities are developing rapidly, economically developed medium-sized cities are also actively planning to catch up straight. In the direct drinking water, stainless steel pipe system is undoubtedly second to none. The current domestic upscale hotels, public places have been configured or in the configuration of direct drinking water pipes.
③ domestic alternative to imports has a bright future
In order to promote stainless steel pipe, China since the 1990s from the reduction of wall thickness, reduce costs, to solve the “high diameter wall ratio of high precision” thin-walled stainless steel pipe technology, so that the application of stainless steel pipe to promote the development of rapid. A pipeline to promote the application, less localization. When, the domestic manufacturers have a part of the production and further development of thin-walled stainless steel pipe and fittings capacity.
