How to choose high quality 304 sanitary stainless steel pipe


How to choose high quality 304 sanitary stainless steel pipe 1. Before using stainless steel pipe, you need to consider the use and environment of 304 stainless steel pipe. For example, the decorative pipe is generally used for the decoration, the seamless pipe is generally used for the fluid transportation, the sanitary stainless steel pipe is used for the medical or kitchen, and the thick-walled pipe is used for the pressure; the general room adopts the 200 series material, and the outdoor needs to use the 304 material. Generally, more than 304 materials should be used in acid-alkaline or coastal areas.
Second, when selecting steel pipes, it must be determined that the material meets the standard.

Take the 304 material as an example:
1. From the price analysis, if the 304 stainless steel tube is even lower than the general price of the 301 material on the market, it should be carefully discerned, it is likely that other materials are posing;
2. Identify whether the stamped material "304" is on the pipe surface and ask for the manufacturer's quality certificate as the certificate;
3. It can be tested with acidic reagent. After 30 seconds, material 304 will not change color and 201 will turn black;
4. Large quantities of samples can be taken and sent to the national authoritative testing center for component testing.

Third, watch the outer surface of the 304 stainless steel tube and the inner wall of the tube whether the color is bright and smooth, the thickness is uniform or rough. Generally, the 304 stainless steel pipe is basically not inspected, and the seamless steel pipe is produced by cold drawing or hot rolling. In the process of improper operation, the thickness is uneven, the pipe surface is cracked, and the surface roughness is generally The seam tube is not polished, and there is no special requirement for appearance without affecting the use.

Fourth, when purchasing 304 stainless steel pipe, you should choose excellent products that have been assessed by the Quality and Technical Supervision Bureau. Long-term use of witness and good word of mouth among customers is the most direct and effective way to purchase.

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