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SA387Gr11Cl1 steel plate for petrochemical pipelines and production method thereof

A production method and steel plate technology, applied in the field of pipeline steel, can solve the problem that ordinary pipeline steel cannot meet the use requirements, and achieve the effects of excellent high temperature creep resistance, high compressive strength and stable quality

Active Publication Date: 2016-08-17
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] All kinds of pressure vessels in petrochemical projects are in service under complex and harsh working conditions of high temperature and high pressure for a long time. As part of the supporting pipeline steel, they also need to be used under severe conditions, which will inevitably lead to the common Pipeline steel cannot meet the existing requirements

Method used

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  • SA387Gr11Cl1 steel plate for petrochemical pipelines and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The specific production process of the SA387Gr11Cl1 steel plate used in the petrochemical pipeline is as follows.

[0027] The thickness of this steel plate is 14.27mm, and it is composed of the following components by weight: C 0.10%, Si 0.57%, Mn 0.50%, P 0.006%, S 0.003%, Cr 1.14%, Mo 0.49%, Ni 0.13%, Cu 0.02% , Al 0.037%, Sb 0.001%, Sn 0.002%, As 0.003%, the balance is Fe and unavoidable impurities.

[0028] The process steps of this steel plate production method are as follows: (1) Smelting process: After the molten steel is smelted in an electric furnace, refined in an LF furnace and adjusted in composition, it is transferred to a vacuum degassing furnace (VD furnace) for vacuum treatment, and the vacuum degree is below 66Pa and kept at 20 The vacuum is broken in 1 minute, and the bag is lifted after 5 minutes of soft blowing.

[0029] (2) Casting process: casting the molten steel after smelting, and adopting continuous casting to obtain continuous ...

Embodiment 2

[0034] Example 2: The specific production process of the SA387Gr11Cl1 steel plate used in the petrochemical pipeline is as follows.

[0035] The thickness of this steel plate is 15.88mm, and it is composed of the following components by weight: C 0.09%, Si 0.52%, Mn 0.45%, P 0.006%, S 0.002%, Cr 1.12%, Mo 0.45%, Ni 0.11%, Cu 0.01% , Al 0.033%, Sb 0.001%, Sn 0.001%, As 0.004%, the balance is Fe and unavoidable impurities.

[0036]The process steps of this steel plate production method are as follows: (1) Smelting process: molten steel is smelted in an electric furnace, refined in an LF furnace, and its composition is adjusted, and then transferred to a VD furnace for vacuum treatment. Hang bag after 5 minutes.

[0037] (2) Casting process: Continuous casting of the smelted molten steel to obtain continuous casting slabs.

[0038] (3) Heating process: the maximum heating temperature of the soaking furnace is 1280°C, and the soaking temperature is 1250°C.

[0039] (4) Rolling ...

Embodiment 3

[0042] Embodiment 3: The specific production process of the SA387Gr11Cl1 steel plate used in the petrochemical pipeline is as follows.

[0043] The thickness of the steel plate is 19.05mm. The steel plate is composed of the following components by weight: C 0.09%, Si 0.62%, Mn 0.46%, P 0.005%, S 0.002%, Cr 1.15%, Mo 0.48%, Ni 0.10%, Cu 0.03%, Al 0.045%, Sb 0.001%, Sn 0.001%, As 0.003%, the balance is Fe and unavoidable impurities.

[0044] The process steps of this steel plate production method are as follows: (1) Smelting process: molten steel is smelted in an electric furnace, refined in an LF furnace, and its composition is adjusted, and then transferred to a VD furnace for vacuum treatment. Hang bag after 5 minutes.

[0045] (2) Casting process: die casting the smelted molten steel to obtain steel ingots.

[0046] (3) Heating process: the maximum heating temperature of the soaking furnace is 1280°C, and the soaking temperature is 1240°C.

[0047] (4) Rolling process: in...

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Abstract

The invention discloses an SA387Gr11Cl1 steel plate for petrochemical pipelines and a production method thereof. The SA387Gr11Cl1 steel plate is composed of the following components in percentage by weight: 0.08-0.11% of C, 0.50-0.65% of Si, 0.40-0.50% of Mn, less than or equal to 0.010% of P, less than or equal to 0.008% of S, 1.10-1.30% of Cr, 0.45-0.55% of Mo, 0.10-0.14% of Ni, less than or equal to 0.20% of Cu, 0.025-0.045% of Al, less than or equal to 0.003% of Sb, less than or equal to 0.010% of Sn, less than or equal to 0.010% of As and balance of Fe and inevitable impurities. According to the steel plate disclosed by the invention, the composition proportion of the SA387Gr11Cl1 steel plate in ASTM A387 is optimistically improved, and the contents of impurity elements such as P and S are strictly controlled; and the steel plate has the advantages of good tensile property, superior low temperature impact toughness, superior high temperature creep resistance, excellent corrosion resistance, higher compression strength, higher low temperature toughness and superior welding performance, and is suitable for high temperature and high pressure severe working conditions of petrochemical equipment.

Description

technical field [0001] The invention relates to a steel for pipelines, in particular to an SA387Gr11Cl1 steel plate for petrochemical pipelines and a production method thereof. Background technique [0002] All kinds of pressure vessels in petrochemical projects are in service under complex and harsh working conditions of high temperature and high pressure for a long time. As part of the supporting pipeline steel, they also need to be used under severe conditions, which will inevitably lead to the common Pipeline steel cannot meet the existing requirements. Cr-Mo series container steel plates are commonly used as materials for manufacturing key equipment in petrochemical projects. They have excellent high temperature performance, low temperature impact performance and excellent corrosion resistance, and are suitable for harsh working conditions of high temperature and high pressure in petrochemical equipment. During the use of Cr-Mo series steel plates for pipelines, in add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/02C22C38/04C22C38/08C22C38/12C22C38/06C22C38/16C21D8/02
CPCC21D8/0226C21D8/0247C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/16C22C38/18
Inventor 邓建军贺霄韦明袁锦程吴艳阳牛红星尹卫江李样兵
Owner WUYANG IRON & STEEL
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