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指出了５０１９异型焊管采用先成型后焊接生产工艺的特点，在生产实践中通过对不同成型工艺的试验、对比和产生的问题的分析，提出了一些改进措施，收到较好的效果
It is pointed out that the 5019 profiled welded pipe adopts the characteristics of the preformed and welded production process, and in the production practice, through the analysis of the test, comparison and problems arising from different forming processes, some improvement measures are put forward and good results are received