离心泵材质选型（Material selection of centrifugal pump）.docVIP

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离心泵材质选型（Material selection of centrifugal pump）.doc

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离心泵材质选型（Material selection of centrifugal pump）

离心泵材质选型（Material selection of centrifugal pump） The petroleum and chemical industry occupy a very important position in the national economy, and the chemical process pump as a key supporting equipment has attracted more and more attention. Because of the complexity of the chemical medium and the increasing demand for environmental protection, how should we select the chemical pump as a chemical manufacturer? Which aspects should we pay attention to? And so on are particularly important. Combined with the characteristics of most chemical companys products, this paper makes a brief comment on the selection of commonly used chemical pumps. It is hoped that it will benefit our customers to do better work in this field. Corrosion resistance All along, corrosion is one of the most headaches of chemical equipment, a slight carelessness, light damage to equipment, heavy accidents, and even lead to disaster. According to statistics, about 60% of the destruction of chemical equipment is caused by corrosion, so in the selection of chemical pumps, we must pay attention to the scientific nature of selection. Usually there is a misunderstanding that stainless steel is universal material, no matter what the media and environmental conditions are stainless steel, which is very dangerous. Below for some commonly used chemical media, talk about material selection points: 1. sulfuric acid as a strong corrosive medium, sulfuric acid is a very wide range of important industrial raw materials. Corrosion difference of different concentration and temperature of sulfuric acid material is large, the sulfuric acid concentration is above 80%, the temperature less than 80 DEG C, carbon steel and cast iron has good corrosion resistance, but it is not suitable for high-speed flow of sulfuric acid, not suitable for ordinary stainless steel valve materials; such as 304 (0Cr18Ni9), 316 (0Cr18Ni12Mo2Ti) the sulfuric acid also of limited use. Therefore, the transmission of sulfuric acid pump valve is