large and small corrugations and may even comprise large corrugations which are made up of small corrugations the corrugated sections in the pipe should be from about one half to two pipe diameter in length and should be spaced from about 40 feet to about 400 feet apart that is one section of corrugations per every 40 foot joint of pipe should be more than adequate whereas one section of corrugations per every ten pipe joints may be too far apart for convenient repair of the damaged section between arrestors benefits of the invention enjoyed most are 1 relatively low cost due to simplified welding and coating requirements particularly for large diameter thin wall pipes as employed for vlcc tanker loading and unloading terminals 2 effective and reliable buckle arresting action plus minimum external corrosion problems due to continuity of the arrestor as part of the pipe wall 3 stronger gripping of the pipe on the laybarge provided that the tensioners are designed to mate directly with the external surface of the corrugations 4 reduced bending stiffness of the pipe at the corrugations which may help to ease construction problems and may allow the finished pipelines to better follow the contours of the seabottom and 5 reduced tensile stiffness which should ease axial stress problems due.