J&T

Stainless steel centrifugal pump, stainless steel flange and pipe fittings for the influence of the corrosion

by:J&T     2020-06-20
Stainless steel centrifugal water pump made of stainless steel material pump, commonly used in general such as 304316316 L, stainless steel centrifugal pump has certain corrosion resistance, when using stainless steel water pump flange and pipe is usually corrosion resistance, stainless steel flange is a common connection device, because of the corrosive medium, flange and fitting effect on the corrosion of what? Stainless steel pipe fittings and flange production enterprises, want to consider to fitting the production cost, but should consider more factors to prevent the corrosion and improve the quality of products, therefore, stainless steel pipe flange production process adopts the solution process, enhance the pipe security is very necessary, heat treatment process on pipe quality and safety plays an important role. We have learned a few enterprises to save costs in pipe fittings production, did not take solid solution treatment, only use polishing method such as sandblasting processing, masked pipe flaw and the insufficiency, this will bring the hidden danger of permanent pipe fittings used. Austenitic stainless steel with heat treatment to soften, the stainless steel is heated to a temperature of about 950 ~ 1150 ℃, the heat preservation time, make the carbide and various alloy elements evenly dissolved in austenite, called solid solution treatment. Stainless steel pipe fittings of solid solution elements: the pros and cons of stainless steel pipe fittings solid solution process on the corrosion resistance of stainless steel, has a great impact on the appearance of brightness, and the processing properties of the stainless steel, plays a decisive role. Therefore, the stainless steel heat treatment process, to the production of stainless steel pipe fittings in a very important position. 1, the solid solution time. Austenitic stainless steel in the process of heating, the residual content of ferrite in steel decrease with the extension of heating time. Therefore, stainless steel pipe fittings solid solution treatment should be controlled at about 1050 ℃, the carbon saturated state, improve the corrosion resistance. And then in the rapid cooling in the air, in order to achieve solid solution effect. 2, the solid solution temperature. According to characteristics of chemical composition of stainless steel, stainless steel solid solution temperature to 950 & ndash; Can reach 1150 degrees Celsius, softening effect, make the stainless steel hardness is restored to 220 hv, meet the requirements of pipeline installation of conformity of quality. If the temperature control is not reasonable, prone to all kinds of quality defects. 3, the solution speed and heat preservation. The low coefficient of thermal conductivity of stainless steel, when the room temperature coefficient of thermal conductivity is only 27% of the carbon steel, therefore, stainless steel heating process should be slow in low heat. If heating speed too fast, easy to deformation, in the solution should be controlled stainless steel heating speed, and pay attention to the time of heat preservation. Such as 316 l steel at 1100 ℃, holding time is long, the residual content of ferrite is reduced. So when choosing stainless steel centrifugal pumps and stainless steel pipe flange must choose reliable reputation, quality assurance of high quality manufacturer, can not ensure the safety of the user's normal production, can improve the service life of the centrifugal water pump.
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