How to choose stainless tubes
Stainless tubes are the main material for making steel structures, but now there are many kinds of stainless steel pipes, and the materials used are also various, which makes it difficult to distinguish true and false stainless tubes on the market. So every time it chooses real stainless steel pipes, it becomes a problem for the enterprise. How to choose real stainless steel pipes?
1. Types of stainless steel pipes
At present, there are mainly 304, 201, and 301 materials on the market. The main difference is the content of chromium and nickel. Material 304 contains chromium 18 and nickel 8-9, while materials 201 and 301 only contain chromium 14, 16, and nickel 1, 5 respectively. It has been scientifically proven that stainless tubes with high chromium and nickel content and better smelting technology have better performance, stronger corrosion resistance, and better finish durability.
2. Beware of shoddy
Because the material contains low chromium and nickel, the price of raw materials is cheap. For example, 999 pure gold is the same as 18K gold. The price is different if the gold content is different. Therefore, the prices of 201 and 301 are low. Some unscrupulous manufacturers also engraved the word “304” on the steel pipes made of materials 201 and 301. Users are kindly requested to learn more about them in order to avoid being deceived.
3. The materials are uneven
At present, the raw materials are imported and produced by domestic large and small manufacturers. Although they are all made of 304, the smelting technology and the content of various chemical elements of each manufacturer are different, the quality is different, and the price difference is about 10%. In addition, there are also qualitative differences in the manufacturing processes of various pipe factories, and the performance and corrosion resistance after use are also strong.
Even if the quality of the poorer does not rust recently, it will turn gray, dark, yellow, or even rust for a long time. Faced with the uneven and complex stainless steel market and the century-old project related to house building decoration, you have to make a wise choice. I would like to remind users in coastal areas not to be greedy for petty gains, so as not to regret it.
4. How to buy high-quality stainless steel pipes?
1. Identify whether the steel stamped material “304” is printed on the surface of the pipe, and obtain the manufacturer’s quality certificate and quality assurance letter.
2. Test with acid reagents, after 30 seconds, material 304 will not change color, and 201 will turn black.
3. Observe whether the color of the outer surface and the inner wall of the tube is bright and smooth and whether the thickness is uniform or rough.
4. When purchasing, choose famous-brand products at or above the provincial level assessed by the Bureau of Quality and Technical Supervision. Long-term use testimony and a good reputation among customers are the most direct and effective ways to purchase.
5. Use and maintenance
1. Avoid cutting iron filing sparks during the welding process to avoid friction with ironware.
2. Beware of the contamination of the cement, lime, oil residue, and other debris, and avoid contact with acidic materials.
3. Use Shuangfei powder or cloth for cleaning, avoid using sewage and detergent.