埋弧焊直缝钢管采用的焊接工艺为埋弧焊技术，采用填充物焊接，颗粒保护焊剂埋弧。生产的口径可以达到1500mm,LSAW是埋弧焊直缝钢管的英文简称，埋弧焊直缝钢管的生产工艺有JCOE成型技术、卷制成型埋弧焊技术。当口径较大时可能用两块钢板进行卷制，这样会形成双焊缝的现象。
介绍了俄罗斯直缝埋弧焊钢管和螺旋缝埋弧焊钢管的生产设备和工艺等制管技术以及独特的热处理管线钢管的特点。
The characteristic of pipe manufacturing technology and its unique heat-treatment pipe for pipeline for production units and processes of Russian LSAW pipes and SSAW pipes is introduced.
直缝埋弧焊管是长距离输送石油、天然气的主要管线产品，钢管由厚钢板压制成形。
LSAW pipes, made by thick steel plates through compacting, are main pipeline products for long-distance transportation of oil, natural gas.
简要介绍了直缝埋弧焊钢管生产线预弯工序的重要性、预弯的功能以及预弯工艺过程。
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.
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