The vacuum tubes for GEO 600 have been manufactured and welded by the Hans Skodock GmbH in Hannover. The basic unit consists of 0.75 m long corrugated pieces of stainless steel with 60 cm diameter, 0.9 mm thickness, and a mass of about 20 kg. Six pieces each are welded at the supplier. After cleaning, these 3 m tubes have been joint together at the site by means of an orbital welding machine. The tubes are suspended at thin steel cables within a trench. The suspension consists of rotating disks mounted on a rail. So the tube can be rotated during welding and pushed into the trench afterwards.
|The welder at work.||A closer look at one
of the many welds.
|The tube in the trench.|
|(Click on a picture in order to obtain a larger one.)|
|Here you can obtain the sketch in parts:|
The drawing has been made by Kasem Mossavi (Version 070406).