Hobas
 HOBAS is a manufacturer of centrifugally cast glassfiber reinforced pipe systems made of unsaturated polyester resin (GRP or FRP) with diameters ranging from 150 mm to 3600 mm as well as filament wound pipes tanks and facilities from 25 mm to over 4000 mm in diameter. The company was founded in Basel in 1957. In 1977 the Wietersdorfer Group acquired the license for the pipe production in Austria and became owner of HOBAS to 50% in 1987.