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, consider the use and environment of 304 sanitary 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, 304 sanitary grade or higher 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 sanitary 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 sanitary grade 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 is rough. The seamless tube is not polished, and there is no special requirement for the appearance without affecting the use.
Fourth, when purchasing 304 sanitary 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.
At present, with the rapid development of China's economic construction, the consumption of 304 sanitary stainless steel pipe stainless steel pipe is increasing continuously, and the demand for 304 sanitary stainless steel pipe is also expanding day by day, and the market prospect is promising.
The fineness of the 304 sanitary grade stainless steel tube can increase the grain boundary bonding force and enhance the strength and toughness of the material. The fine structure not only reduces the impurity content on the unit grain boundary, but also reduces the degree of component segregation during rapid cooling, thereby reducing the effect of accelerated corrosion due to the formation of the galvanic effect. Chromium can significantly improve the corrosion resistance of 304 sanitary grade stainless steel pipes, but the affinity of carbon and chromium can easily form chromium carbide. The higher the carbon content in the steel, the lower the chromium content in the molten layer, and the lower the corrosion resistance of the molten layer. However, the general valve sealing surface requires a certain degree of hardness and strength, and the more carbon content, the higher the strength and hardness of the molten layer. Therefore, the role of carbon in the powder is contradictory.
Filter Tube, also named as tube filter, is made of metal wire mesh and metal plate mesh. Those meshes are rolled into tube shape in different size by winding machine. According to the material, it can be classified into stainless steel tube filter, copper filter tube, black wire cloth tube filter, galvanized steel filter tubes, aluminum sheet filter tube and so on. According to the processing technology, it can be classified into woven mesh tube filter, Welded Mesh filter tubes, perforated sheet filter tube, expanded metal tube filter, etc. Among these products, stainless steel tube filter and black wire cloth tube filter is more popular than other types. And compared with the filter disc, it often has no metal flange. With accurate filtration rate, tube filter can filter a large variety of fluids and retain almost any size solids.
Advantage:
Excellent permeability
Corrosion resistance
High temperature resistance
Outstanding dirt-holding capacity
Accurate filtration precision
Easy processing and installing
Easy forming, painting, polishing, welding and cleaning
Firm structure and different holes patterns
Use:
Filter tube is widely used in petroleum, chemistry, metallurgy, machine, medicine, automobile industries for distillation, absorption, evaporation and filtration processes, so as to eliminate the impurity and foam mixed in the gas and liquid.
Filtration of air: air filters, vacuum filters, filtration of corrosive gases, cage ventilation, etc.
Filtration of liquid: ceramics polluted water cleaning, beverage, disposal of sewage water, filtration of corrosive liquids, beer brewing filter, etc.
Filtration of solid: glass, coal, food processing industry, cosmetics, fluidized beds, etc.
Filtration of oil: oil refining, hydraulic oil, oilfield pipelines, etc.
Filtration of other fields: textile industry, insulation industry, automotive industry, chemical industry, metallurgy, pharmacy, electronic field, etc.
Product Photoes:
Filter Tube
Filter Tube,Stainless Steel Perforated Filter Tubes,Stainless Steel Wire Mesh Filter Tube,Stainless Steel Filter Tube
Anping Xinzheng Metal Wire Mesh Co., Ltd , http://www.sievingmesh.com