A Full Length Pipe Expander is an essential part of the production process in a pipe mill. Tolerances for ovality and straightness of pipes are becoming increasingly important to the later laying of pipes in the field. The pipe expander process makes the welding of the pipeline in the field, even cut pipe sections, much easier. The expander guarantees a consistent, repeatable process regarding diameter and mechanical properties. Fontijne Grotnes is constantly improving the pipe-expanding process in anticipation of new markets.

Fontijne Grotnes developed a straightening system, which is especially designed for small pipes ranging from 16”-30”. This system controls the straightness of the pipes in all directions within ½-API-, ISO and DNV-standards. It is designed in such a way that it can also be mounted on existing expanders. For larger pipes ranging from 32”-64” we have developed a software controlled infeed straightening system.