The longitudinal submerged arc welded pipe production line has three sets: Two for Φ400~Φ1422 mm JCOE unit and the other for Φ400~Φ813mm JCOE unit, which can totally bring an annual production capacity of 500,000 tons. SAWL pipe applications include onshore and offshore conveyance of natural gas, shale gas, the conveyance of oil, petrifaction, town gas, water and coal slurry. SAWL pipe also be used for project field, such as construction, bridge, ocean platform, power engineering, etc.