Thin-walled stainless steel pipe standard

Thin-walled stainless steel pipe standard: Comparison of stainless steel pipes with plastic pipes and other pipes: If the human living space is compared to the human body, the various pipes laid in the living space are like blood vessels and nerves. To transport high-quality drinking water, the selection of pipes and fittings is very important. In this regard, the author recently visited relevant experts from the Stainless Steel Branch of China Special Steel Association.   Experts believe that most of the building water pipes nowadays are concealed projects and pipeline well projects.

If the pipe materials are not selected properly, according to expert calculations, it will cause economic losses to investors that are 10 to 20 times the value of the water pipe materials themselves. In addition, the selection of pipe materials is also a barometer of the development and progress of the water industry. There are five selection principles for water supply pipes: safety and reliability, economy, sanitation, energy saving, and sustainable development. These are also the major characteristics of green pipes. Only pipes that can well meet these principles are really good pipes.

Strength Comparison

The most commonly used stainless steel in the water industry is 304 and 316 stainless steel, which can meet most water treatment and delivery conditions. The tensile strength of 304 stainless steel pipe is twice that of steel pipe, 3~4 times that of copper pipe, and 8~10 times that of plastic pipe. The strength of the material determines whether the water pipe is strong, crashworthy, safe and reliable. Safety and reliability are the most important requirements for building water supply.

In the case of external impact, the possibility of water leakage from stainless steel water pipes is extremely small, while the water leakage rate of copper pipes and plastic pipes is relatively high, and the pipes are easily damaged by construction or secondary decoration. The main reason for residents of several major cities in China to complain about plastic water pipes is water leakage, and one of the main reasons for water leakage is that plastic water pipes cannot withstand the impact of external force. The working pressure of the high-rise water supply system is generally greater than 0.6Mpa;

the requirements for the pressure of the pipe are relatively high. The working pressure of the plastic pipe used in the water supply system is less than this value, which is not competent; the expansion coefficient of the two materials of the composite pipe is very different, such as the bond is not strong or the temperature changes are easy to produce a separation layer;

the maximum pressure of the thin-walled copper pipe can reach 5.9 Mpa; and the thin-walled stainless steel pipe can withstand high water supply pressure due to its excellent mechanical properties, which can reach more than 10Mpa, and is especially suitable for high-rise water supply. In fact, many world-renowned high-rise buildings have adopted stainless steel water supply main pipes. For example, the communication tower in Kuala Lumpur, Malaysia is the fourth tallest communication tower in the world.

It uses 304 stainless steel pipes and high-pressure Victaulic joints to supply water to the 421-meter building; the Taipei Financial Center, which was completed in 2004, is 508 meters high and will be the tallest building in the world. , its water supply pipeline including the main pipeline is a stainless steel pipe with a diameter of 318 meters and a Victaulic joint.

Specifications of thin-walled stainless steel pipe:

1. Excellent corrosion resistance. The thin and strong oxide film on the surface of stainless steel makes stainless steel have excellent corrosion resistance in all water qualities, even if it is buried underground. Therefore, it is suitable for all kinds of water quality. In addition to disinfection and sterilization, there is no need to control the water quality. At the same time, there is no corrosion and excessive exudate. It can keep the water quality pure and hygienic, prevent secondary pollution, and can withstand up to 30 meters per second. high water impact.

2. Excellent mechanical and physical properties. The strength of stainless steel water pipes is very high, which is twice that of galvanized pipes, three times that of copper pipes, and 8-10 times that of PP-R pipes. , so it is very safe and reliable; at the same time, it has good thermal insulation performance and is especially suitable for hot water transportation.

3. Long service life. The field corrosion test data shows that the service life of stainless steel water pipes can reach 100 years, and stainless steel water pipes require almost no maintenance. Therefore, its performance-price ratio is very good, the operating life cost is low, and the economic benefits are significant.

4. The appearance of the thin-walled stainless steel tube is bright and clean for a long time, which caters to the needs of modern people in pursuing a high-quality life. 5. The maintenance cost is low, basically no maintenance is required for use, the service life of the product is at the same period as the service life of the building, the overall cost is low, and the cost performance is high. 6. Stainless steel pipes can be recycled and used repeatedly, and the recycling value is high.