Welding method of stainless steel plate

A technology of stainless steel plate and welding method, which is applied in welding equipment, welding equipment, auxiliary welding equipment, etc., to achieve the effect of flexible welding method, simple operation and shortened maintenance period

Active Publication Date: 2015-09-16
PANGANG GRP ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant welding operation control technology for lining components at the construction site.

Method used

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  • Welding method of stainless steel plate
  • Welding method of stainless steel plate
  • Welding method of stainless steel plate

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Experimental program
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Embodiment Construction

[0025] The welding method of the stainless steel plate of the present invention will be described in detail below.

[0026] The purpose of the present invention is to provide a welding method for stainless steel plates. This welding method is easy to operate and is suitable for welding during on-site maintenance.

[0027] According to the welding method of stainless steel plates of the present invention, the method comprises: a step of cleaning the area to be welded of the stainless steel plates; a step of pairing the cleaned stainless steel plates; lapping the paired stainless steel plates The step of welding the joint; the step of welding the end joint between the edge of the welded stainless steel plate and the end of the steel pipe; the step of closing the arc for each section of the weld; Steps for water cooling.

[0028] The following will refer to figure 1 The welding method of the stainless steel plate of the present invention is described in detail to FIG. 5 .

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Abstract

The invention discloses a welding method of stainless steel plates. The method comprises the steps of cleaning areas, to be welded, of stainless steel plates; pairing the cleaned stainless steel plates, adhering the stainless steel plates to the inner surface of a steel pipe by using annular support tools, coiling the stainless steel plates along with the inner surface of the steel pipe to form a lining, pairing junctions among the stainless steel plates by using overlapping joints; positioning and welding the overlapping joints of the paired stainless steel plates, and then welding by using a skip welding process; connecting edges of the stainless steel plates which are formed as the lining on the inner surface of the steel pipe to the end of the steel pipe by using edge joints, and positioning and welding the edge joints, and then welding by using the skip welding process; and stopping arc of each section of welding line, and stopping arc by using a method of breaking arc and stopping arc. The method is simple to operate and capable of ensuring that the welding quality of the stainless steel plates of flue gas desulphurization devices in chemical industry, improving corrosion resistance in acid medium and prolonging service life of equipment.

Description

technical field [0001] The invention relates to a welding method for stainless steel plates, in particular to a welding method for 254SMo stainless steel plates. Background technique [0002] In the flue gas desulfurization device, the desulfurization technology using "ionic liquid" to circulate and absorb flue gas has a high desulfurization efficiency. However, after the device has been in operation for a period of time, due to the very harsh corrosion environment, the complexity of the system environment has higher requirements on the corrosion resistance of the device material. One of the main materials is 316L stainless steel. Although this material has strong anti-corrosion properties, it will form inclusions on the surface under the influence of high temperature in acidic environment for a long time, which will destroy the protective film on the surface of stainless steel and form Partial perforation, trachoma and other leakage phenomena. In addition, during the weldi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/00
CPCB23K9/00B23K9/025B23K9/0282B23K9/235B23K37/0531B23K2103/04
Inventor 朱宁何耀飞吴荣善潘子祥陈梦逢
Owner PANGANG GRP ENG TECH
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