Continuous coated pipe is advantageous when lengthy sections of pipe are to be weighted, such as wide river crossings or offshore lines.
In addition to providing negative buoyancy, the concrete provides protection for the pipe. Coated pipe can also be used under road or rail crossings by pulling the coated sections through a steel casing or slick bore. This also gives the pipe additional protection from corrosion induced from galvanic action if insulators fail.
Concrete coating is available via machine or form-applied coating. Prepared at the job site to any thickness, form-applied coating saves the cost of transporting heavy coated pipe over long distances. The process includes application of a circular outer form to the pipe and filling of that annular space with concrete.