tukiputki

Tukiputki is a Finnish term that literally translates to “support pipe.” It refers to a specialized hydraulic cylinder used in industrial and marine engineering to provide vertical support and counterbalance for heavy equipment, such as large turbines, wind turbine towers, and offshore platforms. The device consists of a steel pipe assembled with a pistonic bore and a hydraulic actuator that allows for precise vertical movement and load distribution.

The engineering principle behind the tukiputki is to convert hydraulic pressure into controlled mechanical force while maintaining a low center of gravity. This reduces the overall bending moment on the structure and mitigates torsional stresses that can arise during fastening or maintenance operations. The typical specifications include a bore diameter ranging from 100 mm to 200 mm, a stroke length of 300 mm to 600 mm, and a maximum operating pressure of 350 bar. Material selection often involves carbon steel or stainless steel for corrosion resistance, especially in offshore environments.

In practice, the tukiputki is integrated into temporary scaffolding or permanent foundations. During installation, the device can lift and hold massive components in position, enabling workers to perform precise alignment and welds. Its utility has been recognized in both renewables and heavy power generation sectors. Researchers have published case studies on the efficacy of tukiputki in reducing fatigue life of support structures, noting improvements in load cycling and maintenance intervals. The term has also found adoption in Dutch and Swedish engineering circles, where it is sometimes referred to as “ondersteuningspijp.”