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  • How to improve the strength of bolt connection?

    How to improve the strength of bolt connection?

    In most cases, the strength of the tension bolt connection depends on the strength of the bolt. There are many factors that affect Bolt strength, including material, structure, size parameters, manufacturing and assembly process, etc. The following introduces some measures to improve bolt strength. ...

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  • Does stainless steel rust?

    Does stainless steel rust?

    Does stainless steel rust? At first glance it seems like a false proposition. But life stainless steel rust everywhere, such as the picture below! Why does iron rust? Iron exposed in the air, and oxygen and water chemical reaction, produce a variety of iron oxide, the specific performance ...

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  • Why is the track of the train not stainless steel, but rusty iron?

    Why is the track of the train not stainless steel, but rusty iron?

    Rail track is short for railway track, made of steel with high hardness and high toughness, because manganese steel is hard and wear-resistant and has a certain impact toughness to meet the conditions of manufacturing rail. The density of manganese rail is very high. When the oxidation rust film i ...

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  • The use difference between butterfly valve and gate valve

    The use difference between butterfly valve and gate valve

    Gate valves and butterfly valves are used in the pipeline to switch and regulate the flow. Of course, there are some methods in the selection process of butterfly valve and gate valve. In the water supply network, in order to reduce the re soil depth of pipelines, butterfly valves are generally sel ...

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  • Valve selection guide and selection basis

    Valve selection guide and selection basis

    At present, there are more and more valves on the market, the types of valves are particularly complex, and the structures and materials are also different. The selection of valves is crucial to the long-term operation of the device in the working conditions. Improper selection of valves and users& ...

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  • Detailed explanation of suitable working temperature and working condition of main parts of valve

    Detailed explanation of suitable working temperature and working condition of main parts of valve

    One of the problems that must be considered in valve design and material selection is the working temperature of the valve. In order to standardize the appropriate working temperature of the main material of the valve, from the material properties of various types of steel and alloy marks for val ...

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  • Detailed methods for correct operation of valves

    Detailed methods for correct operation of valves

    Valve is a device used to control the direction, pressure and flow of fluid in piping system. It is a device to make the medium (liquid, gas and powder) in piping and equipment flow or stop and control its flow. Valve is an important control component in fluid transportation system. Preparation ...

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  • Corrosion behavior of 304 and 316H stainless steel in LiF-NaF-KF molten salt

    Corrosion behavior of 304 and 316H stainless steel in LiF-NaF-KF molten salt

    The corrosion behavior of 304 and 316H stainless steel in LiF NaF KF (flinak) molten salt at 700 ℃ was studied by means of static corrosion, SEM / EDS and EPMA. The results show that the main corrosion form of the two stainless steels in flinak molten salt is the selective loss of CR at t ...

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  • Research on pipeline anticorrosive coating

    Research on pipeline anticorrosive coating

    Corrosion is the main cause of material failure. Metal corrosion is a major economic problem. According to relevant statistics, China’s annual loss caused by metal corrosion accounts for about 5% of the GNP, pipeline corrosion accounts for a large proportion. With the sustained and rapid de ...

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  • What are the valve anti-corrosion measures?

    What are the valve anti-corrosion measures?

    Corrosion is the destruction and deterioration of materials under the action of various environments. Metal corrosion is mainly caused by chemical corrosion and electrochemical corrosion, and the corrosion of non-metallic materials is generally caused by direct chemical and physical effects. What ...

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  • Detection technology of metal additive manufacturing defects

    Detection technology of metal additive manufacturing defects

    In the process of metal additive manufacturing, the material temperature changes violently and the behavior is complex. Due to the special process characteristics, all kinds of defects, including surface and internal defects, inevitably appear in the parts, which seriously endanger the performanc ...

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  • Basic analysis of steel fracture

    Basic analysis of steel fracture

    There are thousands of steel varieties used in various industries. Each kind of steel has different trade names due to different properties, chemical compositions or alloy types and contents. Although the fracture toughness value greatly facilitates the choice of each steel, these parameters are di ...

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