Composite metal and method of making the same

A composite tube resistant to interaction with chemical materials conveyed therein and to static charge, the composite tube comprising:

• a polymeric tube having an outer wall surface, the polymeric tube having an outer wall surface, the polymeric tube having a wall thickness less than about 0.02 inch;
• and
• a cylindrical metal tube having an outer wall concentrically disposed around and in mating engagement by an interference fit with said outer wall surface of said polymeric tube, said cylindrical metal tube having a wall thickness greater than that of said polymeric tube an having an outer diameter less than about 3/4 inch wherein said outer wall of said continuous interior tube and said inner wall surface of said outer metal conduit have essentially uniform contact characteristics longitudinally and circumferentially wherein said interior wall is of essentially uniform thickness.

Composite tube stock having a total wall thickness, a length and a circumference said composite tube stock comprising:

• an outer metal layer having an interior wall surface and a wall thickness less than about 0.3 inch comprising between about 40% and about 99% of the total wall thickness, the outer metal layer having an outer diameter between about 3/16 and 3/4 inch;
• and
• an inner non-reactive layer conforming by an interference fit to said interior wall surface of said outer layer, said non-reactive layer composed of an extrudable polymeric material selected from the group consisting of polyamide resins, polytetrafluoroethylene resins and mixtures thereof, said inner non-reactive layer having a wall thickness less than about 0.02 inches, wherein said inner non-reactive layer and said interior wall surface of said outer metal layer have essentially uniform contact characteristics longitudinally and circumferentially wherein said interior wall is of essentially uniform thickness.