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Preparation and operation process of blind flange pumping and blocking operati……

Large blind flange pumping and blocking operations above DN1400 occur less frequently in the daily maintenance and project expansion of the gas system of iron and steel enterprises. Such operations are relatively complex, requiring high preparation and cooperation of personnel and machines. The operation with gas takes a relatively long time and is dangerous. By sorting out the preparation process and operation process, the whole process of pumping and blocking operation will be standardized and institutionalized to improve the operation efficiency and ensure the smooth and safe process of blind flange pumping and blocking operation. As the main carrier of […]

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Penetrant testing of sealing welds between steam generator tube sheet and tube……

This paper introduces the penetrant testing process and operation of the sealing weld between the steam generator tube sheet and the tube hole, analyzes on the common defects of the penetrant testing of the sealing weld, which can provide experience for the penetrant testing and quality control of the sealing weld between the tube sheet and the tube hole of the main equipment of the nuclear island in China, and provide a reference for the peers. The steam generator is one of the key equipments in the nuclear island of the nuclear power plant, which generates steam through heat exchange, drives […]

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Effect of Solution Temperature on Microstructure and Properties of 022Cr22Ni5M……

After solution at 1060 ℃, 2205 steel has a tensile breaking strength of 731MPa, elongation of 38%, and impact energy of Akv (- 40 ℃) of 76-81J, meeting the standard requirements. With the increasing demand for energy, the exploration and development of oil and gas wells are facing more technical problems. Oil well pipe long-term service in corrosive media and alternating load conditions, for this reason, Sweden developed for acid oil well pipe and pipeline material SAF2205 steel, China in the early 1980s developed and SAF2205 steel chemical composition close to 022Cr22Ni5Mo3N duplex stainless steel. 022Cr22Ni5Mo3N steel is an austenitic-ferritic […]

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Discussion on Heat Tracing of Chemical Process Pipeline

This paper analyzes the different heat tracing methods of pipeline in chemical production process, and discusses the heat tracing methods of process pipeline in chemical plant. In the chemical production process, when the heat insulation can not meet the process material pipeline insulation requirements, generally use the form of pipeline heat insulation. Heat tracing mode introduction The heat tracing medium of process pipeline has hot water, steam, heat carrier and electric heat. The most commonly used is steam tracing heat and electric tracing heat. Because the chemical plant generally have by-production steam or spent steam can be used, can reduce […]

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How to select the correct valve

The correct choice of valves: understand the characteristics of the valve and the steps and basis for selecting the valve In the fluid piping system, the valve is a control element, which is mainly used to change the end of the pipeline and the direction of media flow, control the pressure, flow, temperature of the transported media a device. It is mainly used to change the end of the pipeline and the direction of media flow, control the pressure, flow, temperature of the transport medium of a device, so want to know how to choose the right valve? When selecting […]

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Manufacturing performance of Hastelloy C-276

In many modern industrial fields (such as: electric power, petrochemical, metallurgy, steel, medicine, food hygiene, paper making, light textile, environmental protection, etc.), the daily production of industrial instruments are required to measure their process parameters. But in some special industrial fields, many of the measured media are corrosive, and some of the measuring instruments to be measured directly in contact with the media, which requires our measuring instruments in contact with the media part should have good corrosion resistance. So in the design process, for different media we have to choose a different contact fluid material. To meet the requirements […]

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Discussion on Quality Control of U-shaped Multilayer Metal Bellows Expansion J……

In the actual process of manufacturing U-shaped multilayer metal bellows expansion joints, the relevant processes and standards for the production and manufacturing of hydraulic forming U-shaped multilayer metal bellows expansion joints must be strictly followed. A series of work, such as tube blank blanking, longitudinal seam tungsten argon arc welding of tube blank, tube blank cleaning and fitting, can ensure the quality in this process and effectively improve the efficiency. Note that the quality control of hydraulic forming and other processes is also covered in the above scope. The transmission pipeline of corrugated expansion joint is essentially a compensation element, […]

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Calculation of deformation rate

Heat treatment for recovery performance According to Article 8.1 of GB150.4-2011, when the steel plate cold forming pressure components meet any of the following a) – e) conditions and the deformation rate exceeds the range in Table 4, corresponding heat treatment shall be carried out after forming to restore the material properties. 8.1. Recovery performance heat treatment of formed pressure parts 8.1.1 When the cold formed steel plate pressure element meets any of the following conditions (a)~e) and the deformation rate exceeds the range in Table 4, corresponding heat treatment shall be carried out after forming to restore the material […]

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A Comprehensive Guide To Die Forging

What Is Die Forging? Die forging is a forging method that uses a die on special die forging equipment to shape the blank and obtain forgings. This method produces forgings with precise dimensions, small machining allowances, and complex structures with high productivity. Characteristics of die forging In the die forging hammer or press with forging die will metal billet forging processing. Die forging process has high production efficiency, low labor intensity, accurate size, small machining allowance, and can forge complex shape forgings; suitable for mass production. However, the die cost is high, special die forging equipment is required, and it […]

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What is a forged cylinder

The cylinder barrel is part of the steam engine containing the piston. Forged cylinders are generally stronger than cast cylinders and can withstand higher pressures without breaking. They are also much more durable than these two types because they do not wear quickly due to use or corrosion. Forging also makes it lighter and cheaper than casting cylinders, which is a huge advantage for small machinery manufacturers (such as agricultural equipment or construction machinery manufacturers). Forging workers use high temperature to transform liquid metal (usually iron) into different shapes, thereby forming finished products by high-pressure compression at high temperature. The […]

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