The project position of welder qualification test for long transporting pipe depends on verticaldownwelding basically, which is namely fixed pipe with axis horizontal welding (5gx).
长输管道的焊工考试项目位置基本以向下焊为主，即水平固定全位置焊(5gx)。
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The cold cracking sensibility of high tensile pipeline-steel was studied by Ygroove cracking test using seven kinds of high cellulose electrode of verticaldown position welding.