FIELD: process engineering.
SUBSTANCE: invention relates to machine building and can be used in ship building, power engineering, oil and gas industry for producing bent pipelines. Proposed method comprises cutting bent and straight pipe sections with branch joints, machining of edges, assembling pipeline straight section, welding the joints and bending pipeline in pipe-bending machine. Tubular billet for bent sections are made straight with allowance exceeding preset length of bent section axis along central line making at least 0.8 OD of pipe, for each side of the biller adjoining the straight section. Straight section billet length is made reduced by the allowance of adjacent bent section.
EFFECT: lower labour input, ruling out use of tamplets, higher reliability of pipelines.
1 dwg
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