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DE2805335A1
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Continuous advance device for tubes during drawing process - uses by two=part clamping jaws on driven endless chain
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DE2746180A1
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Composite plastics-insulated pipe - comprises mantle shaped from a strip, particulate insulating material, and coaxial inner pipe
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DE2738705A1
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Drawing die for continuous welded tube mfr. - using a polygonal surface on the conical inlet of the die
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DE2728210A1
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Contraction of faulty welding on tube - prevents tube breakage in die plate due to draw tension
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DE2721029A1
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Seam welded tube mfr. - in which tube is rolled to reduce its dia. prior to welding and drawing
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DE2704148A1
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Continuous reduction of seam welded tube - in welding and drawing plant, involves additional reduction between welding and drawing sections
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DE2354164A1
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Continuous plastics-coating lacquering or painting seamed pipe - with pipe except edge weld zones coated before welding, then afterward in weld zone
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DE2354163A1
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Machine for forming of seam welded tube - uses pair of rollers to produce range of tube sizes
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DE2354161A1
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Continuous production of seam welded and drawn tube - performs forming, welding, pre-sizing and driving in continuous sequence
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DE2354160A1
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Tube production by spiral wrapping metal strip - exerts pressure on welded joint by applying torsion to tube
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DE2354162A1
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Pipes continuously insulated in production line - by fitting segments around pipe as it advances
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