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CompRack AB © 2008 • Privacy Policy • Terms Of Use
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FAQ about:
CompRack® materials
Materials and processes undergo continuous development and fibre composites are no exception. This group of materials was introduced in the 1950’s and have been an established industrial technology since 1970. Today products such as skis, wind generators, boats and a large number of vehicle components in addition to aerospace-industry (just to name a few examples) are manufactured in composite materials due to the superior properties of these materials.
At the beginning of the 90’s, CompRack were introduced to the problems associated with conventional trash racks and it soon became obvious that by introducing new material technology opened for a solution with superior properties. One of the areas to which special attention was paid during development work was ice and particularly frazil ice accumulation. CompRack’s low thermal conductivity combined with its special geometry and surface properties has shown that the risk for ice accumulation is dramatically reduced.
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CompRack®
Material
Does the composite material corrode?
NO - the material in the CompRack – system is made of glass-fiber composite that is well known for its excellent corrosion resistance properties.
Is the material much lighter than steel?
YES - The specific gravity for the CompRack material is 2090kg/m3 compared to steel that has 7800 kg/m3. This makes CompRack a lightweight system, which simplifies installation and maintenance. Weight approx. 25-30% of a comparable steel solution.
Is the material environmental friendly?
YES - No need for sand-blasting or painting improves the environment.
Same type of material is used in food end beverage contact applications.
What is the ultimate strength of the material?
Tensile strength is over 900 MPa according to test SS-EN ISO14125:1998 according to material test made by Sicomp (www.sicomp.se) in Sweden.
Tensile strength for steel is normally 340-470 MPa.
What elasticity characteristics compared to steel does the material have?
The CompRack material is linear elastic all the way up to the ultimate strength >900MPa. Steel is elastic up to the yield point, normally 235MPa. As long as a material is loaded in the linear elastic area of the material characteristic, it will return to its original shape when unloaded. For example this makes the composite capable to cope with high dynamic impact loads. This happens when floating ice hits a trashrack. |
CompRack®
Profile
Why ist the CompRack especially well suited for low head applications?There is a significantly lower headloss when using a CompRack flow-optimized profile then comparable flat-bar profile. This is important by lowhead applications because the headloss over the trashrack has a higher influence on the overall efficiency. The CompRack profile has a form factor that is only 1/3 of the flat-bar factor. The form factor is used. The form factor is directly related to the headloss.
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