How to choose stainless steel pipe?

Stainless steel pipes are the main material for making steel structures. However, there are now many types of stainless steel pipes and the materials used are also diverse, making it difficult to distinguish the authenticity of stainless steel pipes in the market. Therefore, choosing real stainless steel pipes becomes a problem for the company every time. So how to choose real stainless steel pipes?
1. Types of stainless steel pipes
The difference is mainly due to the different contents of chromium, nickel, etc. Raw material 304 contains 18 chromium and 8-9 nickel, while raw materials 201 and 301 only contain 14 and 16 chromium and 1 and 5 nickel respectively. It has been scientifically proven that stainless steel pipes with high chromium and nickel content and good training technology have better performance, stronger corrosion resistance, and stronger smoothness and durability.
2. Beware of shoddy goods
Because the raw materials contain low chromium and nickel, the purchased raw materials are priced cheaply. For example, 999 pure gold is the same as 18K gold, but the gold content is different, so the prices are different. Therefore, the quotations of 201 and 301 are on the low side. A single unscrupulous manufacturer chooses steel pipes made of 201 and 301 materials and also has the words "304" engraved on them. Users are advised to have a thorough understanding when purchasing and beware of being deceived.
3. The quality of materials varies from good to bad.
At present, raw materials come from imports and are produced by domestic large and small manufacturers. Although they are all made of 304, each manufacturer's training technology, content guidelines of various chemical elements are different, and the quality is different. The price difference is about 10%. In addition, there are quality differences in the manufacturing processes of various pipe manufacturers, and their performance and corrosion resistance after use are also different. Even if the quality is poor, it will not rust in the near future, but it will turn gray, yellow, or even rust over time. Faced with the mixed stainless steel shopping malls and the ever-changing business related to house construction and decoration, you have to make the right choice. We would like to remind users in coastal areas not to be greedy for cheap and avoid regret.
4. How to choose high-quality stainless steel pipes?
1. Identify whether the steel stamped material "304" is stamped on the surface of the tube, and obtain the manufacturer's quality certificate and quality assurance certificate.
2. Use acidic reagent to test. After 30 seconds, material 304 does not change color, but material 201 turns black.
3. When purchasing, you should choose famous brand products at or above the provincial level that have been judged by the Quality and Technical Supervision Bureau. Having long-term usage testimonials and good reputation among customers is the most direct and effective way to purchase.
5. Operation and maintenance
1. During the welding process, avoid sparks from cutting iron filings to prevent friction with iron.
2. Pay attention to cement, lime, oil residue and other debris contamination, and avoid contact with acidic items.
3. Use Shuangfei powder or cloth to clean, avoid sewage and detergent.