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. ...

Read more

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 ...

Read more

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& ...

Read more

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 ...

Read more

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 ...

Read more

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 ...

Read more

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 ...

Read more

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 ...

Read more

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 ...

Read more

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 ...

Read more

In the production process, vanadium steel, like other high-strength low-alloy steels, is mainly produced by continuous casting process, with relatively few die casting processes. Therefore, the continuous casting process is generally concerned. The quality of the continuous casting billet, such a ...

Read more

The manufacturing process of butt-welded seamless elbows is divided into two types: hot-rolled (extruded) seamless elbows and cold-drawn (rolled) seamless elbows due to their different manufacturing processes. Rolled pipes are divided into two types: round pipes and special-shaped pipes. The proce ...

Read more