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How to choose stainless steel weld neck flange material

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Update time : 2020-09-17 09:58:46

  It is mainly used in food industry and surgical equipment, adding molybdenum to obtain a special corrosion-resistant structure. Because of its better chloride corrosion resistance than 304, it is also used as "marine steel". SS316 is usually used in nuclear fuel recovery devices. Grade 18/10 stainless steel usually also meets this application level.

  In order to save stainless steel, the welding ring is adopted. The structure must be machined after the welding ring and nozzle are welded. Generally used below the operating pressure of 2.5MPa. Smooth surface weld neck flange, due to poor connection rigidity, sealing performance is not good, so toxic and flammable explosive medium air tightness requirements of high equipment should not be used.

  The connection plate of this structure is made of carbon steel or stainless steel. If carbon steel is used, the surface needs to be nickel plated. The clamp material is made of cast aluminum ZL7. The sealing roughness of the connection plate is 20, and there is no obvious radial groove and notch.