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What is Bimetallic Tubes?

What is Bimetallic Tubes?

February 22, 2016

What is a Bimetallic tube?

Bimetallic tubes is a process of two different materials unified into a single homogeneous metallic tube. Usually the inner material is a corrosion resistance alloy (Copper, Aluminium-Brass, Titanium) whereas the outer material is a high stress resistant alloy(Stainless Steel, Carbon Steel, Titanium), depending on application.

OK. In laymen’s term, it means we have two different types of tubes or pipes, lets say Pipe 1 of a smaller tube inserted into Pipe 2 of larger tube. A high pressure is then inserted into the smaller tube, causing it to expand and contacts with the inner diameter of Pipe 2. An example below shows a bimetallic tube of copper (Inner) and aluminium (Outer).


High pressure using water (Described in the later sections) unifies the two material by the formation of strong intermetallic bonding due to diffusion between aluminium and copper, see picture below:


The result is a unified pipe but consisting of two different materials bonded together.

Below is a picture of a bimetallic tube of Stainless Steel on the outer tube and Copper on the inner tube. The other picture shows a Bimetallic tube of Stainless Steel at Outer tube and Aluminium at the inner tube.


Our factory can use any combination of two materials and any sizes. This depends on the different types of application, whether it is for marine engineering purpose for heat exchanger or for refrigeration, cooling, evaporation purposes. Details on this applications refer to our categories.

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