Tensioner

For the couplings Simple wire coupling and Fixed elongation coupling, a SIMO Tensioner may be given.

The tensioner is a passive pneumatic hydraulic cylinder, where the supplied pressure holds the mean tension in the pipe, preferably so that the piston moves around its mean-stroke position.
The holding force at the mid-stroke position can be adjusted by adding or removing gas/oil at the pressure side.

An example of the force-displacement characteristic for two pre-set mean forces (blue and green lines) is illustrated in figure below, where also the piston motion range due to wave motion is illustrated by a red arrow.