Abstract: Described in the article are the JCOE manufacturing process and the equipment configuration of the JCOE production line for large-sized LSAW pipes as located at a certain domestic company. The said operation line is composed of such equipment units as the 100%-coverage skelp UT system，the hi-speed pre-bending machine，the integrated type cutter-head edge-milling machine，the JCOE skelper，and the fluidic technology-based full-automatic weld NDT system，etc.Elaborated here are the main aspects of the said production line，involving product mix，manufacturing process，and the technical data and characteristics，and technological advantages of the equipment units.