The purpose of prebending process of longitudinal submerged arc welding pipe production line is introduced;character of roller prebending and mould press type prebending is analyzed.

• 介绍了直缝埋弧焊钢管生产线预弯工艺的目的,分析了辊式预弯和模压式预弯的特点,指出当前直缝埋弧焊钢管生产线中普遍采用模压式预弯工艺。