Casing of a kind used in drilling for oil or gas kg 2

73.05 - Other tubes and pipes (for exam le, welded, riveted or similarly closed), having circular cross-sectrons, the externa diameter of which exceeds 406.4 mm, of iron or steel (+). r - Line pipe of a kind used for oil or gas pipelines : 7305.11 - - Longitudiially submerged arc welded 7305.12 - - Other, 1ongildinalIy welded 7305.19 - - Other 7305.20 - Casing of a kind used in drilling for oil or gas - Other, welded : - - Longitudinally welded 7305.39 - - Other 7305.90 - Other 7305.3 1 The tubes and pipes of this heading are obtained, for exam le, by welding or riveting preformed, unclosed, tubular shapes produced from flat-rolled pro ucts. B The tubular shapes can be produced : - - longitudinally or spirally in a continuous operation by means of a set of rollers, for flat-rolled products m colls; or longitudinally in a non-continuous operation by means of a press or rolling machine, for flat-rolled products not in coils. In the case of welded articles, the abutting edges are welded without filler rcetal b flash-welding, by electrical resistance or induchon welding, or by submerged arc weldlug wxt filler metal and flux or gas protection to prevent oxidation. As regards products obtained by riveting, the abutting edges are overlapped and joined by rivets. E The products of this heading may be coated with, for example, plastics or with glass wool combined with bitumen. They include line pipes of a kind used for oil or gas, casings for oil or gas wells, tubes for lon mains for coal or other solid materials, tubes for piling or structura distance waterlines or sl columns, as well as hydroe ectric conduits, usually reinforced with rings. The heading does not cover : (a) Tubes, pipes and hollow profiles, of heading 73.03,73.04 or 73.06. (b) Tube or pipe fittings of iron or steel (heading 73.07). (c) Tubes or pipes made up into specific identifiabIe articles.

Subheading Explanatory Notes. Subheadings 7305.11,7305.12,7305.19 and 7305.20 The rovisions of the Explanatory Note to subheadings 7304.11, 7304.19, 7304.22, 7304.23, 7304.24 and fi04.29 apply?mutatis rnutandir, to these subheadings. Subheading 7305.11 This subheadin covers tubes manufactured from steel late b forming in a press or by rolling, and by welding by an ectric an:with the addition of metal anzwith f?kx m prevent oxidation of the metal at the moment of fusion. f After welding there is a raised bead of metal, the " weld bead ", which is clearly visible on the external surface of the finished tube. subheading 7305.12 This subheading covers mainly tubes manufactured from coils of steel by continuous forming through a train of forming rolls and electric welding b resistance or induction without the addition of metal. After welding there is no raised bead of metal on J e external surface of the finished tube. -