Continuous removal of organic coating, e.g. resin, from steel pipe - involves heating pipe with a medium frequency induction coil and burning off to remove coating completely without thermally degrading steel
An organic coating on hollow metal bodies, esp. steel pipes, is removed where they have an epoxy undercoat and an ethylene-copolymer to coat, and the surface is cleaned off mechanically for renewed application of the organic coating. The metal wall is uniformly heated to at least 200 deg.C but max....
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Main Authors | , , |
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Format | Patent |
Language | English German |
Published |
24.02.1994
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Edition | 5 |
Subjects | |
Online Access | Get full text |
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Summary: | An organic coating on hollow metal bodies, esp. steel pipes, is removed where they have an epoxy undercoat and an ethylene-copolymer to coat, and the surface is cleaned off mechanically for renewed application of the organic coating. The metal wall is uniformly heated to at least 200 deg.C but max. 350 deg.C by induction heating at medium frequency, the coating is then immediately heated externally in the presence of oxygen so that it is thermally broken down at at least 400 deg.C but max. 550 deg.C but without causing the metal wall to exceed 400 deg.C. The product is then subjected to the mechanical cleaning. ADVANTAGE - The procedure is continuous. It effectively removes all coatings from the metal surface but without heating it enough to affect its properties. |
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Bibliography: | Application Number: DE19934304551 |