PIPE-JOINING METHOD AND APPARATUS FOR PRODUCING UNDERWATER PIPELINES, AND UNDERWATER-PIPELINE-LAYING VESSEL COMPRISING SUCH AN APPARATUS

摘要

A METHOD OF JOINING PIPES (3) TO PRODUCE UNDERWATER PIPELINES (2), WHEREIN THE FACING FREE ENDS (15) OF TWO ADJACENT PIPES (3), ALIGNED ALONG AN AXIS (A), ARE WELDED TO DEFINE A CUTBACK (18); A PROTECTIVE SHEET (22) OF PLASTIC MATERIAL IS EXTRUDED CLOSE TO THE CUTBACK (18); AND THE PROTECTIVE SHEET (22) IS WOUND ABOUT THE CUTBACK (18).