Solutions for rusting of 304/304L stainless steel seamless pipes

　　Keep the surface of 304/304L stainless steel seamless pipes clean. If contaminants and dark colors are found, they should be cleaned in time.

　　If the 304/304L stainless steel seamless pipe is slightly corroded, first derust the stainless steel pipe, use passivation paste solution or spray, and then clean it with water after 10 seconds.

　　A new passivation film will be formed on the surface of the stainless steel. Other stainless steel cleaners can also be used; pipes with severely corroded stainless steel pipes should be replaced in time.

　　Flush the 304/304L stainless steel seamless pipe, the flow rate should be above 1 meter/second, and discharge the metal powder and dirt remaining during the installation of the pipe into the pipe; the water source for pressure testing and cleaning of the pipe should be municipal drinking water , self-drawn underground well water, river water and sea water cannot be used; after the pipeline cleaning and pressure test are completed, the accumulated water in the pipe should be removed. If the accumulated water in the pipe cannot be drained, try to circulate the pipeline system with water at least once a week.

　　If the 304/304L stainless steel seamless pipe has corroded parts, it should be replaced immediately; use a well-qualified construction unit. During the welding and assembly process, residual tensile stress should be avoided as much as possible, and the structure should be used with minimal stress concentration. coefficient, and the part in contact with the medium has the minimum residual tensile stress.

　　If the specific media in the water do not affect the use of 304/304L stainless steel seamless pipes, removing these impurities is an effective control method and strictly control the chlorine and sodium chloride content in the water.

　　After the pipeline cleaning and pressure test are completed, the accumulated water in the 304/304L stainless steel seamless pipe should be drained. If the accumulated water in the pipe cannot be drained, an attempt should be made to circulate water through the pipe system at least once a week to allow harmful impurities to migrate into gaps, dead corners and other places. As a steel pipe factory, it is recommended to choose some stainless steel pipe products with strong stress corrosion resistance.