On board of the Pioneering Spirit, pipe parts are welded together. Via the Stinger transition-frame (on board of the Pioneering Spirit) the pipe is placed on the Stinger and rolls over the 'rollerboxes' into the water. The Stinger leads the pipe to the bottom of the sea and guarantees the most ideal curvature of the welded pipe during the installation phase. The stinger was constructed in Belgium and assembled in Vlissingen. The entire unit, including the transition frame between the hull and the stinger, will be 210m long.
The pipelay tension capacity of the Pioneering Spirit will be 2000te, making it the largest pipelay vessel in the world. Offshore operations are expected to start in the summer of 2016.