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Wuxi fulintai iron and Steel Co., Ltd

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Address: No.168 qiangao Road, Liangxi District, Wuxi City

Current location: home page > Industry trends >Qitaihe professional alloy steel pipe welding requirements manufacturers
Qitaihe professional alloy steel pipe welding requirements manufacturers
Double click auto scroll Publisher: administrator release time: September 18, 2020 reading: one hundred and six Secondary [font: large in Small

Qitaihe alloy steel pipe welding requirements news


Alloy steel pipe is mainly used in power plant, nuclear power plant, high-pressure boiler, high-temperature superheater and reheater and other high-pressure and high-temperature pipelines and equipment. There are many kinds of material classification. In short, it can be divided into high, medium and low alloy steel pipes.

How to distinguish the three? What are the criteria for distinguishing them?
1. The alloy steel with the total content of alloying elements less than 5% is called low alloy steel, such as CrWMn, 9SiCr, 9mn2v, GCrl5;
2. Alloy steels containing more than 5% and less than 10% alloy elements are called medium alloy steels, such as Cr4W2MoV, cr4wv and cr6wv;
3. The alloy steel containing more than 10% alloy elements is called high alloy steel, such as Cr12, Cr12Mo1V1, Cr12MoV.
In summary, the differences between the three are very big, mainly including the chemical composition, processing technology and application occasions. The specific material depends on the construction requirements.




 Welding requirements of Qitaihe alloy steel pipe

Qitaihe alloy steel pipe welding requirements in stock


The high-pressure alloy pipe 12cr1moV 273*10 national standard of large number of large number Electronic discussion ***
The high-pressure alloy pipe 12cr1moV 420*12 national standard of large number of large number Electronic discussion ***
The high-pressure alloy pipe 12cr1moV 420*14 national standard of large number of large number Electronic discussion ***
The high-pressure alloy pipe 12cr1moV 420*16 national standard of large number of large number Electronic discussion ***
The high-pressure alloy pipe 12cr1moV 420*28 national standard of large number of large number Electronic discussion ***
The high-pressure alloy pipe 12cr1moV 420*30 national standard of large number of large number Electronic discussion ***


Brief introduction to welding requirements of Qitaihe alloy steel pipe


? The selection principle of load-bearing alloy steel pipe is to ensure that the structure is safe and reliable, to meet the use requirements, to be economical and reasonable, and to save steel.
1) the importance of structure. According to the importance and safety level of the building structure, the corresponding alloy steel pipe grade is selected.
2) load characteristics. According to the nature of the load, select appropriate steel, including static or dynamic force, frequent or accidental action, full load or not full load, and put forward necessary quality assurance measures.
3) connection method. The content of carbon, sulfur, phosphorus and other harmful chemical elements of the steel used in the welding line should be low, the plasticity and workability index should be high, and the welding performance should be good. The structure of non welded connection can be reduced properly.
4) temperature environment of the structure. For structures working at low temperature, especially welding structures, killed steel with good resistance to low temperature brittle fracture should be selected.





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