Since the current equipment and system equipment are designed and manufactured according to the original processing of domestic low-sulfur crude oil, the equipment has poor adaptability, and the growth of imported crude oil has brought about comprehensive corrosion of equipment and systems. Especially for heat exchange equipment, in order to ensure its long-term safe operation, it is urgent to develop some new corrosion-resistant materials for the manufacture of heat exchanger tube bundles. In order to meet the needs of petrochemical enterprises, 08Cr2AlMo seamless steel pipe, based on 12Cr2AlMoV, has jointly developed a new type of 08Cr2AlMo heat exchanger special seamless steel pipe with high resistance to H2S-H2O system and H2S-HCl-H2O system stress corrosion cracking, and resistance to high-temperature sulfur corrosion and dilute organic acid corrosion. The new steel retains the content of corrosion-resistant elements Cr, Al, and Mo in chemical composition, reduces the C content of steel, and eliminates the V content. This not only maintains corrosion resistance but also ensures that the hardness of the steel pipe matches the hardness of 16Mn forgings commonly used in oil refining equipment, ensuring good expansion performance. The steel was subjected to H2S stress corrosion resistance test, HCl aqueous solution corrosion test, and...
Here are some ways to judge the quality of 201 stainless steel pipes: Appearance inspection: The surface of high-quality 201 stainless steel pipes should be smooth, flawless, crack-free, scratch-free, etc., and the color should be uniform and consistent. Thickness measurement: Use appropriate tools to measure the wall thickness of the pipe. The uniform and standard-compliant ones are generally of good quality. Material testing: Professional testing methods can be used to determine whether its chemical composition meets the standards of 201 stainless steel. Corrosion resistance test: For example, place the pipe in some corrosive media for a period of time to observe its corrosion. Strength test: Mechanical properties such as stretching and bending can be tested. High strength usually has better quality. Welding quality: If there is a welded part, check whether the weld is firm and has no defects such as pores. Manufacturer reputation: Choose a well-known and reputable manufacturer, and its product quality is often more guaranteed. Certificate review: Request to view relevant quality certification certificates, test reports, etc. Magnetic detection: 201 stainless steel pipes usually have a certain degree of magnetism, but the strength of magnetism can also reflect the quality to a certain extent. Process precision: Observe...
Food-grade stainless steel refers to the part of food machinery that comes into contact with food and must meet certain food safety requirements. Because a lot of acid and alkali are used in the food production process, stainless steel must be used; stainless steel contains chromium, and unqualified stainless steel will dissolve chromium at various prices and is toxic; moreover, it is required to limit the content of various alloy impurity elements such as lead and cadmium. . Food-grade stainless steel is a stainless steel material that is required to comply with the regional specifications, and its lead and chromium content is much lower than that of ordinary stainless steel. All kinds of food storage containers and food processing machinery should be made of austenitic stainless steel. All kinds of tableware should be made of martensitic stainless steel. For surface anti-corrosion treatment of food-grade stainless steel, the latest, environmentally friendly and universal Senyuan brand stainless steel passivation liquid, stainless steel pickling passivation liquid and stainless steel electrolytic polishing liquid can be used to treat the surface according to different needs, in order to improve the surface of food-grade stainless steel. The purpose of improving corrosion resistance and increasing surface aesthetics....
The differences and uses of stainless steel 2D surfaces and 2B surfaces can be briefly summarized from the following two blocks: 1. Introduction to the differences between stainless steel 2D surface and 2B surface: Many customers still don’t quite understand the difference between the 2D surface and the 2B surface of stainless steel. Here is a brief introduction: NO.1 Silvery white, matte. A rough, matte surface that is hot-rolled to a specified thickness and then annealed and descaled. Uses that do not require surface gloss. NO. 1 Stainless steel 2D surface, silver-white cold rolling, heat treatment and pickling, sometimes a final light rolling on the rough side roller, a matte surface processing 2D product used for purposes that do not have strict surface requirements, general materials, Deep drawing materials. NO. 1 The surface gloss of stainless steel 2B is stronger than that of stainless steel 2D. After surface treatment of stainless steel 2D, it is subjected to a final light cold rolling with a polishing roller to obtain appropriate gloss. This is the most commonly used surface treatment and can also be used as the first step in polishing. The 2D surface of general stainless steel is also one of...
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