Copper
tube when initially installed will start a natural reaction
with the oxygen dissolved in the water to form its own
protective layer of copper oxide on the inner surface.
In
drinking water applications the surface of the protective
layer will react with the gases and salts which are
contained in the water. Above the protective layer,
a coating layer is formed which predominantly consists
of basis copper carbonates (predominantly malachite).
Depending on the composition of the water, this layer
varies from turquoise blue to a deep green, (normally
green) in cold-water systems to a brown shade in hot-water
ones.
Copper tube after forming its protective layer.
If
an installation is left for sometime before use or is
not flushed properly then the natural layer may not
form correctly and therefore there is a higher risk
of internal corrosion.
A
major selling feature of Lawton Tubes domestic size
copper tube is that a pre coated oxide bore is applied
at the manufacturing stage to copper tube sizes 15x0.7,
22x0.9 and 28x0.9mm. This visible matt orange
tint is to enhance the corrosion resistance
for the life of the product.
Our
pre coated tube can be used for any domestic installation
applications irrespective of whether the tube is used
for drinking water supply (hot or cold), heating systems,
oil, gas supplies or thermal solar systems.
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