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通过对大口径有缝钢管压制及纵缝焊接工艺的研究.确定了合理的坡口形式,以及内缝CO_2焊+外缝窄间隙埋弧焊的焊接工艺参数.工艺评定结果证明,接头性能均满足有关技术条件的要求.评定结果已应用于大口径管的制造.
Through the research on the process of large-diameter slotted steel pipe pressing and longitudinal seam welding, the reasonable groove form and the welding process parameters of the internal seam CO_2 + narrow gap submerged arc welding are determined.The results of process evaluation show that the joint properties Meet the requirements of the relevant technical conditions. Assessment results have been applied to the manufacture of large-diameter pipe.