Double-walled tube for transporting loose material, fluids or pastes has outer casing of thin-walled metal and inner casing of thick walled plastic tube

摘要

A double-walled tube for transporting loose material, fluids or pastes comprises an outer casing (12), preferably of thin-walled metal and an inner casing (14), preferably of thick-walled plastic tubing. Preferably the outer and inner casings are firmly connected together by exact size matching and preferably the tube is produced by pressing the inner casing into the outer part in lengths of up to 5 m.