12Cr2MO high pressure boiler tube

High pressure boiler steel pipe:
It is mainly used to manufacture high-quality carbon structural steel, alloy structural steel and stainless heat-resistant steel seamless steel pipes for steam boiler pipes with high pressure and above. Oxidation and corrosion will also occur under the action of flue gas and water vapor, so steel pipes are required to have high lasting strength, high oxidation resistance, and good organizational stability.

The steel grades used are:
High-quality carbon structural steel grades are 20G, 20MnG, 25MnG;
Alloy structural steel grades 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc.;
Stainless steel commonly used 1Cr18Ni9, 1Cr18Ni11Nb

In addition to ensuring the chemical composition and mechanical properties of the high-pressure boiler tubes, a hydrostatic test should be carried out one by one, and a flaring and flattening test should be carried out.

Steel pipes are delivered in heat-treated condition. In addition, there are certain requirements for the microstructure, grain size and decarburization layer of the finished steel pipe. Seamless steel pipes for geological drilling and oil drilling control; drilling rigs are used to find out the underground rock structure, groundwater, oil, natural gas and mineral resources. Oil and natural gas exploitation is inseparable from drilling wells. Seamless steel pipes for oil drilling for geological drilling control are the main equipment for drilling, mainly including core outer pipe, core inner pipe, casing, drill pipe and so on.

Because the drilling pipe has to go deep into the formation depth of several kilometers, the working conditions are extremely complex, the drill pipe is subjected to stress such as tension, compression, bending, torsion and unbalanced impact loads, and it is also subjected to mud and rock wear. Therefore,

It is required that the pipe must have sufficient strength, hardness, wear resistance and impact toughness. The steel used for the pipe is represented by "DZ" (geological Chinese Pinyin prefix) plus the number one to represent the yield point of the steel. The commonly used steel grades are:
45MnB, 50Mn of DZ45;
40Mn2, 40Mn2Si of DZ50;
40Mn2Mo, 40MnVB of DZ55;
40MnMoB of DZ60, 27MnMoVB of DZ65.
Steel pipes are delivered in heat-treated condition.

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