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  • What is duplex stainless steel?

    What is duplex stainless steel?

    What is duplex stainless steel? Duplex stainless steel (DSS for short) refers to stainless steel with ferrite and austenite accounting for about 50% respectively, and the content of less phase generally needs to reach 30% at least. In the case of low C content, Cr content is 18% ~ 28%, Ni cont ...

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  • How to select the spring as the core part of safety valve?

    How to select the spring as the core part of safety valve?

    What is a safety valve? Safety valve is an automatic valve, which uses the force of medium itself to discharge a rated amount of fluid without any external force, so as to prevent the pressure from exceeding the rated safety value. When the pressure returns to normal, close the valve again and ...

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  • Numerical simulation of residual stress and deformation of butt weld of SUS304 stainless steel pipe

    Numerical simulation of residual stress and deformation of butt weld of SUS304 stainless steel pipe

    Stainless steel has excellent corrosion resistance and plays an important role in the process of ship building in China, especially for some key bearing parts of ship lift, stainless steel plays an irreplaceable role [1]. In the manufacturing process of stainless steel components, welding is the ...

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  • Joint sealing system of flat welding flange

    Joint sealing system of flat welding flange

    The joint sealing system of flat welding flange is mainly composed of a pair of flanges, a gasket and several bolts and nuts. The sealing process is also a process of deformation and harmony among various components under the working conditions of pre tightening, pressure rise, temperature rise, ...

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  • What is a control valve?

    What is a control valve?

    What is a control valve? The regulating valve, also known as the control valve, is the terminal executive component in the industrial process control system. In the industrial process continuous production automatic control system, the regulating valve is generally used to control various proc ...

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  • Research Progress on corrosion characteristics of CO2 marine storage system pipeline

    Research Progress on corrosion characteristics of CO2 marine storage system pipeline

    With global climate change becoming the main threat to human sustainable development, reducing CO2 emissions to mitigate climate change has become a hot topic in the international community. Carbon capture and storage (CCS) technology is of great significance in reducing CO2 emissions, which can ...

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  • The manufacturing process of high-end bolts in China from the perspective of C919

    The manufacturing process of high-end bolts in China from the perspective of C919

    On May 5, 2017, the domestic large passenger aircraft C919 took off at Shanghai Pudong airport. The aircraft is high-tech in terms of aerodynamic shape and fuselage material, so it has also won many orders from airlines in the past two years. However, the pedigree of C919 has always been a contro ...

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  • What is a steel pipe?

    What is a steel pipe?

    What is a steel pipe? Steel pipe is a kind of steel with hollow circular section, whose length is far greater than the diameter or circumference. According to the material, it is divided into carbon steel pipe, alloy steel pipe and stainless steel pipe; according to the purpose, it is divided ...

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  • What is pipe fitting?

    What is pipe fitting?

    What is pipe fitting? Pipe fitting is the general name of components in piping system that connect, control, change direction, divert, seal, support and so on. Steel pipe fittings are all pressure bearing fittings. According to the different type of end connections, it can be divided ...

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  • What is a ball valve?

    What is a ball valve?

    What is a ball valve? The ball valve is mainly composed of valve seat, ball, sealing ring, valve rod and other driving devices. The valve can be opened and closed by turning the valve rod 90 degrees. It is used to close, distribute, regulate the flow and change the flow direction of medium ...

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  • What is a flange?

    What is a flange?

    What is a flange? Flange is a part connecting shaft to shaft, which is used for the connection between pipe ends; it is also used for the connection between two equipment, such as reducer flange, on the inlet and outlet of equipment. Flange connection or flange joint refers to the detacha ...

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  • Several common surface treatment methods of bolt and nut

    Several common surface treatment methods of bolt and nut

    According to the properties of nuts, there are national standard (GB), German standard (DIN), international standard (ISO), Japanese standard (JIS), American Standard (ASTM / ANSI) and other standards. Among them, national standard, German standard and Japanese standard are represented by M (for ...

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