Flatness measurement of tower flanges
If flatness measurement of the flanges is difficult depends, among other things, on the diameter of the tower. Smaller diameters (up to 4 meters) are usually straightforward to measure. But large diameters, especially large offshore towers, require a different approach.
Our patented sectional measurement software is ideal to use in this case. With this method, the flange is measured as four sections, which are then mathematically combined for a complete result. There are two main advantages to this: the measurement is not affected by the flange being deformed by its own weight (gravitational impact). It also makes the work safer for the technician, who does not have to stand on a high ladder or platform – all measurement takes place from ground level. See more in this video.
You can measure up to 5 circles with measuring points per flange, and check not only the flatness but also the angle ("taper") of the flange relative to the flange plane for correct joining of the tower sections. Immediately after completing the measurement, you can view the result as a 3D image in the display unit and evaluate the results with different best-fit calculations for possible further processing. This can be done directly on site, without having to use a PC with a separate analysis programs, which streamlines the work.
Two systems can be used for flange measurement: Easy-Laser® E910 or E915. They are basically the same, but the E915 features a laser transmitter with a rotating head.