A method for butt welding of a group of air separation unit tower type equipment

By employing lifting and jack support methods in the assembly and welding of tower-type equipment in air separation units, and by welding in sections and adjusting verticality, the problems of high welding difficulty and difficulty in controlling misalignment were solved, achieving efficient and low-cost welding results.

CN116689914BActive Publication Date: 2026-06-26CHINA THIRD METALLURGICAL GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA THIRD METALLURGICAL GRP
Filing Date
2023-06-29
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The welding of the tower equipment inside the air separation cold box is difficult, the weld is prone to deformation, and it is difficult to guarantee the amount of welding misalignment and the verticality of the equipment, resulting in time-consuming, labor-intensive and costly construction.

Method used

Lifting and hoisting equipment was used to assemble the upper and lower tower bodies, and the welds were evenly distributed and welded in sections. Jacks were used to support and adjust the verticality. A symmetrical and segmented welding sequence was adopted, combined with double-person double-sided argon arc welding technology, to monitor and adjust the misalignment and verticality.

Benefits of technology

It improved welding efficiency, saved construction costs, ensured weld quality and equipment verticality, and provided a safe and stable construction guarantee.

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Abstract

The present application relates to a kind of air separation device tower type equipment group butt welding method, comprising: 1) using hoisting equipment group, upper and lower tower body is divided into several equal parts, the weld perimeter is divided, the welding length of each equal point is 150-200mm, and the total length of welding is 40%-50% of the welding workload of full perimeter;2) remove hoisting equipment, using jack support, using symmetric, segmented welding sequence to fill and cover weld, and using welding sequence to adjust the perpendicularity of tower equipment.The present application can improve the welding efficiency of equipment group, save construction cost, and ensure the weld quality of tower equipment and the perpendicularity of equipment installation.
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