LNG储罐9%Ni钢立缝全自动焊技术

韦宝成; 杨尚玉; 郭鹰

doi:10.7512/j.issn.1001-2303.2020.06.22

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LNG储罐9%Ni钢立缝全自动焊技术
Automatic welding technology of 9% Ni steel vertical weld in LNG tank
2020年50卷第6期页码：113-116
纸质出版：2020
DOI： 10.7512/j.issn.1001-2303.2020.06.22
稿件说明：

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韦宝成, 杨尚玉, 郭鹰. LNG储罐9%Ni钢立缝全自动焊技术[J]. 电焊机, 2020,50(6):113-116. DOI： 10.7512/j.issn.1001-2303.2020.06.22.

WEI Baocheng, YANG Shangyu, GUO Ying. Automatic welding technology of 9% Ni steel vertical weld in LNG tank[J]. Eletric Welding Machine2020, 50(6): 113-116. DOI： 10.7512/j.issn.1001-2303.2020.06.22.

摘要

对比分析了目前大型LNG储罐内罐9%Ni钢立缝对接焊的几种方法

介绍了DPS-3G全自动焊中TIP-TIG和钟摆焊接技术的优异性

研究认为采用DPS-3G全自动交流氩弧焊接技术

能彻底解决9%Ni钢窄坡口焊的侧壁未熔合的行业难题

同时-196℃低温冲击韧性优异

焊接接头性能质量可靠

无损检测一次合格率高

实现了高效率焊接

大幅缩短施工周期

节约施工成本。

Abstract

This paper compares and analyzes several methods of butt welding of 9% Ni steel vertical weld in large LNG tank

and introduces the advantages of TIP-TIG and pendulum welding technology in DPS-3G automatic welding system. It is considered that DPS-3G automatic AC gas tungsten arc welding technology can completely solve the industry problem of side wall incomplete fusion of 9% Ni steel narrow groove welding. At the same time

the low temperature impact toughness of-196 ℃ is excellent

the performance and quality of welding joint are reliable

the first pass rate of non-dest-ructive testing is high

high efficiency welding is realized

the construction period is greatly shortened

and the construction cost is saved.