Current situation of the pipe cold bending for oil and gas pipelines

Fabrication of cold bending pipe is an important process in pipeline construction. With the improvement of pipeline steel grade, diameter and pressure, the quality and service safety of cold bending pipe become particularly important. This paper systematically analyzes the current situation of technologies related to cold bending equipment and process, appearance quality, mechanical properties, and service safety evaluation of cold bending pipe, and related standards. Furthermore, this paper proposes the future development of cold bending pipe for oil and gas pipeline, including: improving the capacity and auto-control of cold bending equipment, innovating the bending method, optimizing cold bending process, strengthening the quality control and safe reliability evaluation of cold bending pipe, and improving relevant standards and systems. The results will have guiding significance to improve the fabrication and application of cold bending pipe.