... 100,000 ton welded pipe production lineProduction line introduction:Large-Diameter Longitudinal Submerged-Arc Welded (LSAW) Pipe Production ... which is very suitable for the manufacturers. the flow:A,plate detectionB,millingC,preflexD,formingE,preweldingF,inside ... equipment, expanding machine, hydrotester, chamfering machine, etc. Large-Diameter Longitudinal Submerged arc welded pipe production line