FIELD: manufacture of welded tubes with doubled walls, possibly for making sections of pipelines for transporting fluids.
SUBSTANCE: method for making doubled wall tubes in electrically welding aggregate comprises steps of placing on small-diameter tube centering members and arranging small-diameter tube coaxially inside large-diameter tube at forming gap between them; feeding small diameter tube into large diameter tube at rate of forming-welding the last; securing to small diameter tube centering members before welding large diameter tube in order to provide formation of mutually communicated extended cavities in inter-tube space; then welding edges of shaped large-diameter tube and sizing it. At least operations of securing centering members, welding and sizing tube are realized during manufacturing process of aggregate.
EFFECT: enhanced efficiency of method.
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RU2677558C1 |
| 0 |
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SU551072A1 | |
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