Abstract: A metal tube having an inner wall coated with a metal foam liner. The metal tube has an outer diameter of between 2 mm and 75 mm, a length of between 10 mm and 1000 mm, and a wall thickness of between 0.2 mm and 2 mm. The metal foam liner has a thickness of between 0.1 mm and 10 mm, a permeability of between 10?13 m2 and 10?8 m2, a capillarity radius of between 5 ?m and 1 mm and a thermo-conductivity of between 1 W/m·K and 50 W/m·K. Also, a method to obtain a metal tube which inner wall is metallurgically bonded in thermo-conduction with a metal foam liner, a method to obtain a metal tube with a heterogeneous metal foam liner, and a method to obtain a tubular metal foam liner 10a from a sheet of metal foam.