Many customers face a lot of problems when selecting materials. Looking at the uneven prices and related problems on the market, they can’t get the final solution. The editor will share some skills with you, so that you can choose the finished products later. improve the cost-effectiveness of products;

1. Take 304 material as an example: when selecting steel pipes, it is necessary to ensure that the material meets the standards.

1. From the price analysis, if the 304 material stainless steel pipe is even lower than the general price of the 301 material on the market, it must be carefully distinguished, it is likely to be impersonated by other materials;

2. Identify whether the steel stamp material “304” can be printed on the surface of the pipe, and ask for the manufacturer’s quality certificate as a proof;

3. It can be tested with an acid reagent, after 30 seconds, the material 304 will not change color, and the material 201 will turn black;

4. For bulk purchases, samples can be taken and sent to the national authoritative testing center for component testing.

2. There are often inner heavy skins, pits, and rolling blue lines in rolled pipes. Under normal circumstances, these cannot be prevented and will not affect the use at all, but when purchasing, you must choose as few as possible, especially when checking Inside and outside.

3. When purchasing, you should choose excellent products that have been assessed by the Quality and Technical Supervision Bureau. It is the most direct and effective purchase method to use witnesses and good reputation among customers for a long time.

4. Check whether the color of the surface and the inner wall of the tube is bright and smooth, and whether the thickness is average or rough. Ordinary welded pipes do not need to be inspected at all, while stainless steel seamless pipes are produced by cold drawing or hot rolling. Improper operation in the production process is prone to uneven thickness, cracks on the pipe surface, etc., while the appearance is rough and generally seamless. The tube has not been polished, if there is no special request for the appearance, it will not affect the use.

5. Before choosing stainless steel seamless pipes, you need to consider the use and application environment of stainless steel pipes. Such as: ordinary welded pipes for decoration, ordinary seamless pipes for fluid transport, sanitary stainless steel pipes for medical treatment or kitchens, and thick-walled pipes for pressure; ordinary indoor materials can be used 200 series materials, outdoor materials such as 304 need to be used, and In the acid-alkaline center or coastal areas, materials above 316 are generally used.