LSAW钢管LongitudinallySubmergedArcWelding简写为LSAW是直缝埋弧焊钢管的专业表达术语LSAW钢管是以单张中厚板为原料，将钢板在模具或成型机中压卷成管坯，采用双面埋弧焊方式并扩径而成进行生产的其成品规格范围较宽，焊缝的韧性塑性均匀性和致密性较好，具有管径大管壁厚耐高压。...