Patent ID: 11859748
Assignee: NIPPON STEEL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  F  G | IPC B  F

Claim 1:
2. The joint connection method for a long pipe according to claim 1, wherein:
the conveyance system comprises pinch rollers that pinch and guide the long pipe, at a position that is furthest on a downstream side in a conveyance direction of the long pipe, and
the joint connection method further comprises:
an attachment attaching step of attaching an attachment to a rear end portion of the second joint;
an attachment girth welding step of girth welding a front end portion of a different pipe to a rear end portion of the attachment by means of the welding apparatus;
a cutting step of, in a state in which the second joint is located in a vicinity of the winding apparatus, fixing the rear end portion of the long pipe to which the second joint is girth welded to the winding apparatus, and thereafter cutting a region of the different pipe located between the winding apparatus and the pinch rollers; and
an attachment detaching step of detaching the attachment from the second joint.