Welding method for assembly of stainless steel tube

A welding method and stainless steel technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve problems such as poor quality, polluting the environment, and low construction efficiency, and achieve the effects of protecting stainless steel pipes, improving work efficiency, and improving work efficiency

Inactive Publication Date: 2013-02-13
SICHUAN GASOLINEEUM CONSTR ENG
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0009] In order to solve the problems of poor quality, low construction efficiency and environmental pollution of the existing stainless steel pipe welding group, a method for butt welding of stainless steel pipes is provided

Method used

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  • Welding method for assembly of stainless steel tube

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Experimental program
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Effect test

Embodiment 1

[0054] In this embodiment, two pieces of stainless steel strips 2 are placed on the welding grooves 7 of two stainless steel pipes 1 respectively. The diameter is longer than 20mm; the outer diameter of the stainless steel pipe 1 is between 70-2000mm.

[0055] The distance between the edge of the stainless steel strip 2 and the welding groove 7 of the stainless steel pipe 1 is 2-5 mm. And let the stainless steel strip 2 evenly cling to the outer wall of the stainless steel pipe 1; spot weld the inner and outer laps of the two ends of the stainless steel strip 2 firmly by argon tungsten arc welding and stainless steel welding wire. Preferably, a fine stainless steel welding wire is selected for welding . The pairing tool adopts the external counterpart 3; use the external counterpart 3 matched with the outer diameter of the stainless steel pipe 1 to ride on the stainless steel belt 2 respectively, fasten the external counterpart 3, and make the external counterpart 3 and its m...

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Abstract

The invention relates to a welding method for assembly of a stainless steel tube, which is aimed at solving the problems of poor quality, low construction efficiency and environment pollution of the conventional welding assembly of the stainless steel tube, and belongs to the technical field of stainless steel tube welding engineering. The method comprises the following steps of: assembling a pad on the outer wall of the stainless steel tube; fastening the pad on the outer wall of the stainless steel tube; installing an assembly tool on the outer wall of the stainless steel tube; correcting the stainless steel tube by the assembly tool; and welding the stainless steel tube. The welding method is applied to the industrial fields of petroleum and natural gas, petrochemical engineering, fertilizers, nuclear industry, sewage treatment and the like.

Description

technical field [0001] The invention belongs to the technical field of welding engineering of stainless steel pipes, and in particular relates to a butt welding method of stainless steel pipes, which is used in industrial fields such as petroleum and natural gas, petrochemical industry, chemical fertilizer, nuclear industry and sewage treatment. Background technique [0002] Stainless steel pipes are very common in various factories and installations of oil and gas gathering and transportation pipelines. The outer diameter of steel pipes ranges from 20 to 2000mm, and most of them are connected by welding. At present, when stainless steel pipes are assembled, the usual method is to assemble them by hand to achieve the alignment gap and misalignment required by the welding operation; during the welding process, paint such as chalk powder on the welding groove The edges of the outer sides of the groove can prevent the hot melt spatter generated by welding from damaging the stai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/053B23K9/028B23K9/173B23K10/02B23K101/06
Inventor 杨旭刘利平
Owner SICHUAN GASOLINEEUM CONSTR ENG
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