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High-strength corrosion-resistant longitudinal welded pipe

A straight seam welded pipe, corrosion-resistant technology, used in pipeline protection, anti-corrosion coatings, pipeline damage/wear prevention, etc., can solve the problem of strength to be improved, and achieve the effect of improving anti-corrosion performance, enhancing pressure resistance, and improving strength

Active Publication Date: 2016-11-16
安徽鹏远金属制品股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the longitudinal welded pipes on the market have not been specially strengthened, and their strength needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-strength corrosion-resistant straight seam welded pipe, comprising a welded pipe body, an alloy layer is formed on the inner wall of the welded pipe body by cladding with alloy powder, the thickness of the alloy layer is 0.5-5mm, and the outer wall of the welded pipe body A layer of anti-corrosion layer is sprayed; by adding an alloy layer in the traditional welded pipe, the strength of the welded pipe is improved, and an anti-corrosion layer is set on the outer surface, so that the welded pipe has very good anti-corrosion performance.

[0026] The thickness of the anticorrosion layer is 0.1-0.3cm.

[0027] The preferred thickness of the alloy layer is 1-3mm.

[0028] The above alloy powder is made of the following components by weight percentage: C: 0.10%-0.24%, Si: 0.15%-1.40%, Mn: 1.20%-2.00%, Ca: 0.40%-1.60%, Zn: 0.15%- 0.50%, Sb: ≤0.30%, Co: ≤0.12%, Sc: ≤0.03%, Al: ≤0.05%, Se: ≤0.015%, Pt: ≤0.010%, and the rest are Fe and unavoidable impurities.

[0029] T...

Embodiment 2

[0034] A high-strength corrosion-resistant straight seam welded pipe, comprising a welded pipe body, an alloy layer is formed on the inner wall of the welded pipe body by cladding with alloy powder, the thickness of the alloy layer is 0.5-5mm, and the outer wall of the welded pipe body A layer of anti-corrosion layer is sprayed; by adding an alloy layer in the traditional welded pipe, the strength of the welded pipe is improved, and an anti-corrosion layer is set on the outer surface, so that the welded pipe has very good anti-corrosion performance.

[0035] The thickness of the anticorrosion layer is 0.1-0.3cm.

[0036] The preferred thickness of the alloy layer is 1-3mm.

[0037] The above alloy powder is made of the following components by weight percentage: C: 0.10%-0.24%, Si: 0.15%-1.40%, Mn: 1.20%-2.00%, Ca: 0.40%-1.60%, Zn: 0.15%- 0.50%, Sb: ≤0.30%, Co: ≤0.12%, Sc: ≤0.03%, Al: ≤0.05%, Se: ≤0.015%, Pt: ≤0.010%, and the rest are Fe and unavoidable impurities.

[0038] T...

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Abstract

Disclosed is a high-strength corrosion-resistant longitudinal welded pipe. The longitudinal welded pipe comprises a welded pipe body. An alloy layer is formed on the inner wall of the welded pipe body through alloy powder in a fusion covering mode. The thickness of the alloy layer is 0.5-5 mm. An anticorrosive layer is sprayed on the outer wall of the welded pipe body. The alloy layer is added in a traditional welded pipe so as to improve the strength of the welded pipe. The anticorrosive layer is arranged on the outer surface, so that the welded pipe has very good corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of metal pipe processing, in particular to a high-strength corrosion-resistant straight seam welded pipe. Background technique [0002] Longitudinal welded pipes, steel pipes made of hot-rolled or cold-rolled steel plates or steel strip coils welded on welding equipment are called straight seam welded pipes, (named because the welded parts of the steel pipes are in a straight line) . According to different uses, there are different post-production processes. The standard for longitudinal welded pipes is GB / T3091-2008. [0003] Straight seam steel pipes are mainly used in water supply projects, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction in China. Used for liquid transportation: water supply and drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structural purposes: as piling pipes, as bridges; pipes for wharve...

Claims

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Application Information

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IPC IPC(8): F16L57/02F16L58/04C09D167/00C09D5/10C09D5/03C09D7/12
CPCC08K2201/011C08L2205/03C09D5/033C09D5/106C09D167/00F16L57/02F16L58/04C08L3/04C08K13/04C08K7/00C08K3/04C08K3/14C08K2003/0893C08K2003/221
Inventor 王诗斌
Owner 安徽鹏远金属制品股份有限公司
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