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Stainless steel chimneyOf course: such a chimney is known to be delivered to the most diverse weather conditions. One might think, often even "defenseless".
It is by no means mentioned here that rain, snow and so on could possibly cause corrosion of the material or cause rust inside the chimney.
Which would justify the construction of a so-called "welfare cap". Smoldering gases and the pollutants contained in the exhaust air such as acids, sulfur & Co. are rather responsible for the sustainable corrosion of a chimney.
In particular, the inner tube could possibly be affected in this way. Especially when it is of only low quality. The consequences for the entire chimney construct are usually already visible from the outside: ugly, brown spots, which spread in the course of time. Even the outer wall of the chimney can be eaten sooner or later, and become brittle or brittle.
It is worth noting that the corrosion resistance of stainless steel is divided into four quality levels: VM, V1, V2 and V3. Based on DIN-EN 1856-1, V3 stands for the best material properties in this regard and a corresponding, very long service life.
The strength is not everything
Against the background of a desired, particularly high stability, the layman assumes, with regard to a stainless steel chimney, that strong
Pipes for a high
Longevity stand. This is by no means the case.
In order to be able to achieve top standards in terms of "statics" and "stability", the clamping straps attached to the chimney are of greater importance. Again, a high material quality and the way of processing are always in the foreground. Clamping bands are an indispensable "connection piece" between the individual components of a stainless steel chimney.
The wider such a clamping band is, the more efficiently the static forces can be absorbed and "distributed".
Also the density matters
In order to additionally ensure a high quality of the stainless steel chimney, the attention should be at the same time on the permissible continuous operating temperature. Speaking of which, chimneys that have pipes with a 0.4 mm thick inner pipe have the following advantages, among other things: due to the lower density, a higher operating temperature can be achieved much faster and, as a result, a stronger "draft" can be achieved. Finally, a stainless steel chimney will only work properly if the inner tube has previously heated up correctly.
Of course, the insulating strength of the fireplace is also important. It is true that the quality improves with the degree of density. At the present time, unencapsulated elements are used in connection with stainless steel chimneys. On this in turn special barriers are attached, which contribute to the fact that neither cold nor moisture can penetrate into the interior of the insulation.