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What is a steam valve

What is a steam valve? The steam valve is to control the opening of the opening and closing parts in the valve body to adjust the flow of the medium and reduce the pressure of the medium. At the same time, it can adjust the opening of the opening and closing parts with the help of the pressure behind the valve to keep the pressure behind the valve within a certain range. Under the condition of the constant change of the inlet pressure, it can keep the outlet pressure within the set range and protect the subsequent life and production […]

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How to choose the right regulating valve?

The regulating valve is the terminal executive element in the industrial process control system. In the industrial process continuous production automatic control system, regulating valve is generally needed to control various process parameters in the process production to achieve the pressure on fluid, the adjustment of parameters such as temperature, flow and liquid level is usually called “hands and feet” in industrial process automation production “. Its application quality is directly reflected on the regulating quality of the system. As a terminal actuator in process control, people have a deeper understanding of its importance than in the past. The application […]

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How to install pipe valve and overhaul?

The function of the valve is to control or adjust the flow state of the fluid. In the construction process, the quality of valve installation directly affects the normal operation in the future, so we must pay attention to it.  So, how to install the valve? What are the main points of valve installation? What are the taboos and precautions? Five main points of valve installation Direction and position Many valves have directionality, such as stop valves, throttle valves, pressure reducing valves, check valves, etc. If they are installed reversely, it will affect the use effect and life (such as […]

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Six heat treatment questions

What is annealing of steel? What are the types and uses of annealing? Answer: Annealing of steel: Annealing is a heat treatment process that heats steel to a temperature above or below the critical point AC1, and then slowly cools it with the furnace after holding it for a certain period of time to obtain a nearly equilibrium structure. Annealing types: According to the heating temperature, it can be divided into annealing above or below the critical temperature AC1. The former includes complete annealing, incomplete annealing, spheroidizing annealing, and homogenizing annealing, and the latter includes recrystallization annealing and stress relief […]

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Effect of Aging Time on Hydrofluoric Acid Corrosion Resistance of 2205 Duplex ……

The precipitate will affect the corrosion performance of 2205 duplex stainless steel in hydrofluoric acid solution. In order to understand this effect, the microstructure of the solution-treated 2205 duplex stainless steel after aging at 800 ℃ for 15, 60 and 120 min was observed through a metallographic microscope, and X-ray diffraction technology was used to analyze the material under different aging times. Phase structure, with the aid of electrochemical polarization and electrochemical impedance methods, the influence of aging time on the hydrofluoric acid corrosion resistance of 2205 duplex stainless steel was tested. The results show that when the aging time […]

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Why is the stop valve low in and high out?

Stop valve, also known as shut-off valve, belongs to the forced sealing valve, is a kind of block valve. According to the connection mode, it can be divided into three types: flange connection, screw thread connection and welding connection. China’s “three modernizations to” once stipulated that the flow direction of the stop valve should be from top to bottom, so the installation has directionality. This type of shut-off valve is very suitable for shut-off or regulation and throttling. Because the opening or closing stroke of the valve stem is relatively short, and has a very reliable cut-off function, and because […]

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How to choose right gaskets?

What is a gasket? Gasket is made of nonmetal, metal or metal nonmetal, placed between the two planes to strengthen the sealing material, in order to prevent fluid leakage, the sealing element is set between the static sealing faces. Standard of gaskets The most common standards of gaskets are: BS10:2009: British Standard specification for flanges and bolting for pipes, valves and fittings. DIN: German Institute for Standardisation (the German Institute for Standardisation). ANSI: the American National Standards Institute. ASA: the American Standards Association (now ANSI). ASME: the American Society of Mechanical Engineers The ASME B16.47 Series A and B took […]

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Advantages of stainless steel pipe compared with PPR pipe

The stainless steel water pipe is safe, clean, hygienic and durable. It is the best direct drinking water pipe. Plastic pipe is generally made of synthetic resin, that is, polyester, stabilizer, lubricant, plasticizer, etc. It is mainly used for water supply system piping, drainage, exhaust and sewage sanitary pipe, underground drainage pipe system, rainwater pipe and threading pipe for wire installation. The stainless steel water pipe has superior sanitary performance, eliminates the problems of “red water, blue-green water, dark water”, and has no peculiar smell, no scaling, no harmful substance precipitation, and keeps the water pure and harmless to human […]

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High temperature corrosion analysis of TP310S stainless steel pipe

The corrosion of TP310S stainless steel pipe in high temperature environment was analyzed by energy spectrum and X-ray diffraction, and the vulcanization mechanism of TP310S stainless steel in high temperature environment was analyzed. Preface TP310S (national standard 0Cr25Ni20) has excellent high temperature mechanical properties and high temperature oxidation resistance. As a structural material, TP310S is often used in some high temperature environments. The 310S seamless pipe used in a chemical plant had steam leakage after one month of use, and then the inlet and outlet valves of the steam superheater were closed and stopped using; the boiler shutdown detection found […]

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Research progress of hydrogen induced cracking of high strength aluminum alloy

Aluminium and aluminium alloys As an environment-friendly lightweight material, it has the advantages of high specific strength, fracture toughness, fatigue strength and good molding process. It is known as one of the most promising lightweight structural materials. It plays an irreplaceable role in aerospace, ship, automobile, high-speed rail, rail transit and nuclear industry. Due to the face centered cubic structure of aluminum alloy, the solubility of hydrogen in aluminum is very low, and the formation of hydrides is difficult, therefore, researchers generally believe that there is no hydrogen induced cracking in aluminum alloy for a long time. However, with the […]

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