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Seamless steel pipe used for petrochemical engineering

A seamless steel pipe, petrochemical technology, applied in the direction of pipes, rigid pipes, pipeline protection, etc., can solve the problems of high impact toughness and fracture toughness and corrosion resistance of seamless steel pipes, and achieve the effect of high plasticity and toughness.

Inactive Publication Date: 2014-12-03
WUXI HAOHAO STEEL PIPE
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, the impact toughness, fracture toughness and high corrosion resistance of seamless steel pipes currently used in petrochemical industries cannot meet the requirements of the petrochemical industry.

Method used

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  • Seamless steel pipe used for petrochemical engineering

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Embodiment Construction

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0014] see figure 1 , the embodiment of the present invention includes:

[0015] A seamless steel pipe for petrochemical industry, comprising: steel pipe body 1, Ni56Cr22Mo13Cu alloy layer 2, Nb-TiAl alloy layer 3, Mg-Zn-Nd-Cd-Zr alloy layer 4 and high corrosion-resistant Fe-(Cr, Ni)-Mo-P-C-B bulk amorphous alloy layer 5, the outer surface of the steel pipe body 1 is sequentially wrapped with the Ni56Cr22Mo13Cu alloy layer 2 and the Nb-TiAl alloy layer 3, the steel pipe body 1 The Mg-Zn-Nd-Cd-Zr alloy layer 4 and t...

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Abstract

The invention discloses a seamless steel pipe used for petrochemical engineering. The seamless steel pipe comprises a steel pipe body, an Ni56Cr22Mo13Cu alloy layer, an Nb-TiAl alloy layer, an Mg-Zn-Nd-Cd-Zr alloy layer and a high-corrosion-resistant Fe-(Cr, Ni)-Mo-P-C-B bulk amorphous alloy layer, wherein the outer surface of the steel pipe body is covered with the Ni56Cr22Mo13Cu alloy layer and the Nb-TiAl alloy layer in sequence; the Mg-Zn-Nd-Cd-Zr alloy layer and the high-corrosion-resistant Fe-(Cr, Ni)-Mo-P-C-B bulk amorphous alloy layer are arranged on the inner surface of the steel pipe body in sequence. According to the invention, through the adoption of the scheme, the seamless steel pipe has sufficient plasticity and toughness as well as high corrosion resistance, and can meet the requirements of the conventional petrochemical industry for seamless steel pipes.

Description

technical field [0001] The invention relates to the field of seamless steel pipes, in particular to a seamless steel pipe used in petrochemical industry. Background technique [0002] Steel for petrochemical equipment is required to have a certain strength under various conditions of use, but also to ensure sufficient plasticity and toughness (including impact toughness and fracture toughness) and corrosion resistance. Due to the continuous emergence of new processes and new equipment in the petrochemical industry, the use conditions of petrochemical equipment are more stringent, and higher requirements are put forward for the plasticity, toughness (including impact toughness and fracture toughness) and corrosion resistance of steel. [0003] However, the impact toughness, fracture toughness and high corrosion resistance of seamless steel pipes currently used in petrochemical industries cannot meet the requirements of the petrochemical industry. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/02
CPCF16L9/02F16L58/04F16L58/08
Inventor 吴君玉
Owner WUXI HAOHAO STEEL PIPE
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