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1前言随着石化行业的不断发展以及国家原油战略储备库项目的实施,储罐的大型化趋势已成为必然。储罐建设的大型化趋势致使提高焊接技术水平成为了当务之急。大型储罐的安装质量好坏主要取决于焊接质量,而大型储罐焊接合格率一直是困扰各个施工单位的一个难题。一方面,高强度低合金钢焊接大多采用焊条电弧焊方法,力图采用较小的
1 Introduction With the continuous development of the petrochemical industry and the implementation of the national crude oil strategic reserve project, the trend of large-scale storage tanks has become inevitable. Large-scale tank construction trend has led to improve the level of welding technology has become a top priority. The quality of a large tank depends mainly on the quality of welding, and the large tank welding qualification rate has plagued all construction units, a problem. On the one hand, high-strength low-alloy steel welding mostly arc welding method, trying to use smaller