Stress design of petrochemical pipeline

In the current offshore oil engineering, pipeline design has become an important link, and the quality of pipeline design determines the success or failure of the offshore petrochemical engineering. Therefore, under this background, we should fully realize the importance of pipeline design in offshore oil engineering, and fully realize the impact of stress conditions on […]

 
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Heat Treatment Technology of Automobile Fasteners

With the development of the automotive industry, the requirements for automotive fasteners are getting higher and higher. China’s automotive high-strength fasteners are the main varieties of bolts, there are 8.8, 9.8, 10.9 and 12.9 grade 4 strength levels, these strength levels of fasteners have to be heat-treated to improve the overall mechanical properties of the […]

 
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Design of Steam Tracing Pipe for Chemical Process Pipeline

The heat tracing design of pipeline plays an important role in real life. In the design, scientific and technical personnel need to determine the heat tracing coefficient and design quota based on the actual situation, so as to ensure that the heat tracing pipeline design meets the actual production requirements and meet the actual production […]

 
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Welding Process of S32750 Super Duplex Stainless Steel Plate

Using the combined welding method of GTAW+GMAW-P, the transverse and vertical welding positions of the 12 mm thick S32750 super duplex stainless steel plate were tested. The selection of welding methods, materials, grooves, process parameters, as well as the cleaning, preheating and interpass temperature control before welding were introduced in detail. After welding, tensile test, […]

 
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Forging knowledge: what is forging?

What is forging? Forging is a processing method that uses forging machinery to exert pressure on metal blank to make it plastic deformation, so as to obtain forgings with certain mechanical properties, certain shape and size. Forging and stamping are both plastic processing properties, collectively referred to as forging. Forging is a common forming method […]

 
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Selection of High Pressure and Subhigh Pressure Gas Pipeline in Cities and Towns

There are many kinds of pipelines used to transport gas, which must be determined according to the service conditions (design pressure, temperature, medium characteristics, area of use, etc.) of gas, welding performance of data and other factors after technical and economic comparison [1,2]. 1. Determination of steel grades of high pressure and sub high pressure […]

 
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Failure analysis of Buried Natural Gas Pipeline Tee

In order to analyze the cause of the fracture of a high-pressure gas pipeline tee, the material metallographic examination, mechanical property examination and micro fracture scanning electron microscope were used to analyze the crack. It was concluded that the tee was not normalized or recrystallized annealed, and the external load was the main cause of […]

 
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What is piping heat tracing?

What is piping heat tracing? Pipeline heat tracing is a kind of constant temperature or heating method to prevent the material in the pipeline from crystallizing and solidifying or to meet the process demand, and to keep the material at a certain temperature. Electric heat tracing system is the use of electrical energy into heat […]

 
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Improvement of grinding method for large diameter thin wall sleeve

Due to the poor rigidity of large-diameter thin-walled sleeve, it is difficult to control the clamping force in grinding, which affects the machining quality. In view of this situation, several improvement schemes are adopted to ensure the machining accuracy requirements and product quality. 1. Preface When grinding the inner and outer surfaces of the sleeve […]

 
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There are 26 ways to take out the drill bit broken in the hole

Engaged in machining people know that the drill in drilling will always encounter so many times the drill bit break. especially CNC machine tools drilling. especially easy to break. and some or deep holes. which is a very headache. but do not be afraid. small workers for you to sort out 26 kinds of drill […]

 
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