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Steel pipe straight seam submerged arc welding groove cleaning agent and its application method

A technology of straight seam submerged arc welding and cleaning agent, which is applied in the field of welding, and can solve problems such as slag inclusions, pores, affecting weld quality, and adverse effects of submerged arc welding in welds, so as to reduce welding defects and improve weld quality. Quality, descaling and oil removal effect

Active Publication Date: 2016-08-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the forming process of the steel pipe, some impurities such as scale and oil will inevitably be produced on the surface, especially at the welding groove. If the scale and oil are not treated cleanly, it will have adverse effects on the subsequent submerged arc welding.
The weld is prone to defects such as slag inclusions and pores, which affects the quality of the weld
[0003] Aiming at the problem of scale and oil stains in steel pipe straight seam submerged arc welding grooves, there is currently a lack of a steel pipe straight seam submerged arc welding groove cleaning agent and its application method that can effectively remove scale and oil stains at the welding groove

Method used

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  • Steel pipe straight seam submerged arc welding groove cleaning agent and its application method
  • Steel pipe straight seam submerged arc welding groove cleaning agent and its application method
  • Steel pipe straight seam submerged arc welding groove cleaning agent and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the cleaning agent for welding groove surface treatment, its components are as follows in terms of mass percentage:

[0025]

[0026] The method for using the groove cleaning agent for straight seam submerged arc welding of steel pipes according to the present invention comprises the following steps:

[0027] (1) Soak the welding groove of the steel pipe in the cleaning agent obtained above for 3 minutes;

[0028] (2) Adjust the position of the steel pipe so that the welding groove faces upwards, use a stainless steel wire wheel to clean the surface of the welding groove, and at the same time output cleaning agent evenly to the groove through the output pipe, and the moving speed of the wire wheel is 1m / min;

[0029] (3) Use deionized water to spray the welding groove surface for 30s. Submerged arc welding is performed after drying.

Embodiment 2

[0031] The difference between embodiment 2 and embodiment 1 is: configure a cleaning agent suitable for the surface treatment of the welding groove of the steel pipe before submerged arc welding, and its components are as follows in terms of mass percentage:

[0032]

[0033] The method for using the groove cleaning agent for straight seam submerged arc welding of steel pipes according to the present invention comprises the following steps:

[0034] (1) Soak the welding groove of the steel pipe in the cleaning agent obtained above for 3 minutes;

[0035] (2) Adjust the position of the steel pipe so that the welding groove faces upwards, use a stainless steel wire wheel to clean the surface of the welding groove, and at the same time output cleaning agent evenly to the groove through the output pipe, and the moving speed of the wire wheel is 1m / min;

[0036] (3) Use deionized water to spray the welding groove surface for 60s. Submerged arc welding is performed after drying....

Embodiment 3

[0038] The difference between embodiment 3 and embodiment 1 is: configure a cleaning agent suitable for the surface treatment of the welding groove of the steel pipe before submerged arc welding, and its components are as follows in terms of mass percentage:

[0039]

[0040] The method for using the groove cleaning agent for straight seam submerged arc welding of steel pipes according to the present invention comprises the following steps:

[0041] (1) Soak the welding groove of the steel pipe in the cleaning agent obtained above for 3 minutes;

[0042] (2) Adjust the position of the steel pipe so that the welding groove faces upwards, use a stainless steel wire wheel to clean the surface of the welding groove, and at the same time output cleaning agent evenly to the groove through the output pipe, and the moving speed of the wire wheel is 1m / min;

[0043] (3) Use deionized water to spray the welding groove surface for 45s. Submerged arc welding is performed after drying....

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PUM

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Abstract

The invention discloses a steel pipe straight seam submerged arc welding groove cleaning agent and a using method thereof. The components of the steel pipe straight seam submerged arc welding groove cleaning agent are as follows in mass percentage: 10-20% hydrochloric acid, 10-15% citric acid, Ammonium chloride 2-5%, glycolic acid 3-5%, sodium silicate 5-8%, non-ionic surfactant 4.5-12%, corrosion inhibitor 1-2%, deionized water balance. The invention can be used for groove surface treatment before straight seam submerged arc welding of steel pipes, effectively removes scale and oil stains at the welding grooves of steel pipes, thereby reducing welding defects and improving weld seam quality.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a groove cleaning agent for straight seam submerged arc welding of steel pipes and a use method thereof. Background technique [0002] The exploitation and transportation of petroleum and natural gas mainly adopt pipelines. At present, the production process of steel pipes mainly includes four steps: forming, welding, diameter expansion and anticorrosion. The welding process generally adopts submerged arc welding. Due to its technical characteristics, straight seam submerged arc welding can be used to produce large-diameter, thick-walled pipeline steel, and is often used in oil and gas transportation. During the forming process of the steel pipe, impurities such as scale and oil will inevitably be produced on the surface, especially at the welding groove. If the scale and oil are not treated cleanly, it will have a negative impact on the subsequent submerged arc welding. The we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/08C23G1/06
Inventor 姚正军林玉划罗西希吴小凤杨红勤张泽磊徐尚君
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS