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
CN103752988BActive Publication Date: 2015-09-16PANGANG GRP ENG TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PANGANG GRP ENG TECH
Publication Date
2015-09-16

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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.
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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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