A lot of the time flexible pipe is a great alternative to the conventional rigid pipe. I think the max size for the flexible pipe is 20” and can be used in almost any application. The good think about it, because of the way it’s constructed ( composite construction), whereby layers of special thermoplastic and corrosion-resistant steel wires are used, the design of flexible pipe can be tailored to a particular application. In addition, the length of the pipeline makes a difference – there is a point where rigid pipe becomes more economical.
One of the great things about the flexible pipe, is a portion of it can be replaced if needed, and you don’t need a large pipelay vessel to lay it, a good size DSV can the job.