Oy KWH Pipe Ab Patent applications |
Patent application number | Title | Published |
20130214034 | METHOD AND APPARATUS FOR COATING PIPES - Method and apparatus for coating a pipe or a pipe section with a layer of at least one polymer. The method includes providing the pipe or the pipe section having an outer surface defining the periphery of the pipe or the pipe section; applying on the outer surface of the pipe or pipe section a layer of at least one polymer material in melt stage using a nozzle, which is mounted on a carriage capable of travelling along the periphery of the pipe or the pipe section; and moving the carriage along at least a part of the periphery during the application of the polymer material to form a layer on the surface of the pipe or the pipe section that is particularly useful for coating field joints in pipelines. | 08-22-2013 |
20130011620 | HOLLOW PROFILE USED IN THE MANUFACTURE OF A PIPE - A hollow profile used in the manufacture of a spirally wound double-walled thermo- plastic pipe, having essentially a rectangular cross section, two side walls and an outer wall and an inner wall limiting a cavity within. In the hollow profile the inner wall of the pipe is thicker than the wall of the hollow profile intended to form the outer wall of the pipe. The inner rounding radius of the edges adjacent to the thicker wall of the hollow profile is considerably larger than the rounding radius of the two other edges of the cavity and the inside surface of the thicker wall comprises a rib extending in the hollow cavity of the profile, on the side of the profile forming the inner side of the pipe, in the longitudinal direction of the profile at least essentially along the whole length of the profile. | 01-10-2013 |
20120231168 | APPARATUS AND METHOD FOR COATING PIPES OR PIPE SECTIONS - The invention relates to an apparatus and method for coating a pipe or a section of a pipe with a polymer layer. The apparatus comprises an applicator for applying polymer melt on the surface of a pipe or pipe section, a roller for pressing the polymer applied by the applicator towards the pipe or pipe section, and means for circumferentially moving the applicator and the roller around the periphery of the pipe or pipe section. According to the invention the apparatus further comprises a drive for rotating the roller as the roller is moving around the periphery of a pipe or pipe section. By means of the invention, higher quality coatings can be applied to field joints of steel pipes, for example. | 09-13-2012 |
20120231160 | METHOD OF COATING PIPES OR PIPE SECTIONS - The present publication discloses a method for coating pipes. The method comprises applying curable first polymer (e.g. epoxy) onto the surface of the pipe and partially curing the first polymer or leaving the first polymer uncured to in order to form a reactive first polymer layer. Thereafter, the pipe with the reactive first polymer layer is heated and a second polymer (e.g. polyolefin) is applied directly onto the heated reactive first polymer layer, whereby the two polymers react and form a protective coating on the pipe or pipe section. In particular, the heating can be carried out in two steps such that the first polymer stays reactive until the application of the second polymer. | 09-13-2012 |
20110248072 | METHOD AND APPARATUS FOR COATING PIPES AND PIPE SECTIONS - Method and apparatus for coating a pipe ( | 10-13-2011 |
20110127262 | CONTAINER WITH ANTISTATIC LAYER - Container for dry powders, granules, pellets, gas and other ignitable substances and method of producing the same. The container comprises a wall ( | 06-02-2011 |
20100213701 | METHOD AND DEVICE FOR JOINING PIPES - The invention concerns a method and device for joining thermoplastics pipes manufactured by spiral winding of a hollow profile. The method according to the invention is characterized in that a welding mirror ( | 08-26-2010 |
20100059132 | MULTIPLE LAYER PIPE - Abrasion resistant polymer pipe and a process for the production thereof. The pipe comprises a first, abrasion resistant inner layer ( | 03-11-2010 |
20090139695 | METHOD AND DEVICE FOR INTERNAL COOLING OF EXTRUDED THERMOPLASTICS PIPES - The invention relates to a method and a device for cooling an extruded thermoplastics pipe ( | 06-04-2009 |
20090098296 | METHOD FOR MANUFACTURING COATED PIPES - The invention concerns a method for manufacturing pipes coated with a peelable protection layer, wherein the core pipe ( | 04-16-2009 |