In the present work, the JCOE forming is inves- tigated using the finite element （FE） method. A two- dimensional FE model is established for the plane strain condition by FE code ABAQUS, and the FE model is vali- da...In the present work, the JCOE forming is inves- tigated using the finite element （FE） method. A two- dimensional FE model is established for the plane strain condition by FE code ABAQUS, and the FE model is vali- dated by experiments. The aim of this research is to inves- tigate forming quality states in the JCOE forming process; in particular, the effects of technological parameters on form- ing quality are evaluated. Taking the JCOE forming process of X80 steel φ1 219 mm × 22 mm × 12 000 mmwelding pipe for instance, the deformation characteristics of JCOE forming are analyzed, in which the geometry of the formed pipe, residual stress distributions and effects of process parameters on JCOE forming quality can be obtained. Thus, the presented results of this research provide an effective approach to improve welding pipe forming quality.展开更多
Since the development of offshore oil and gas, increased submarine oil and gas pipelines were installed. All the early steel pipes of submarine pipelines depended on importing because of the strict requirements of com...Since the development of offshore oil and gas, increased submarine oil and gas pipelines were installed. All the early steel pipes of submarine pipelines depended on importing because of the strict requirements of comprehensive properties, such as, anti-corrosion, resistance to pressure and so on. To research and develop domes- tic steel pipes used for the submarine pipeline, the Longitudinal-seam Submerged Arc Welded （LSAW） pipes were made of steel plates cut from leveled hot rolled coils by both the JCOE and UOE （the forming process in which the plate like the letter “J”, “C”, “0” or “U” shape, then expansion） forming processes. Furthermore, the mechanical properties of the pipe base metal and weld metal were tested, and the results were in accordance with the corresponding pipe specification API SPEC 5L or DNV- OS-FI01, which showed that domestic LSAW pipes could be used for submarine oil and gas pipelines.展开更多
基金The authors are grateful for the financial support provided by the Natural Science Foundation of Hebei Provincial Education Department, China, the Natural Science Foundation of Inner Mongolia, China, the Inner Mongolia Higher School Science and Technology Research Projects and the Program of Higher-Level Talents of Inner Mongolia University, China.
文摘In the present work, the JCOE forming is inves- tigated using the finite element （FE） method. A two- dimensional FE model is established for the plane strain condition by FE code ABAQUS, and the FE model is vali- dated by experiments. The aim of this research is to inves- tigate forming quality states in the JCOE forming process; in particular, the effects of technological parameters on form- ing quality are evaluated. Taking the JCOE forming process of X80 steel φ1 219 mm × 22 mm × 12 000 mmwelding pipe for instance, the deformation characteristics of JCOE forming are analyzed, in which the geometry of the formed pipe, residual stress distributions and effects of process parameters on JCOE forming quality can be obtained. Thus, the presented results of this research provide an effective approach to improve welding pipe forming quality.
文摘Since the development of offshore oil and gas, increased submarine oil and gas pipelines were installed. All the early steel pipes of submarine pipelines depended on importing because of the strict requirements of comprehensive properties, such as, anti-corrosion, resistance to pressure and so on. To research and develop domes- tic steel pipes used for the submarine pipeline, the Longitudinal-seam Submerged Arc Welded （LSAW） pipes were made of steel plates cut from leveled hot rolled coils by both the JCOE and UOE （the forming process in which the plate like the letter “J”, “C”, “0” or “U” shape, then expansion） forming processes. Furthermore, the mechanical properties of the pipe base metal and weld metal were tested, and the results were in accordance with the corresponding pipe specification API SPEC 5L or DNV- OS-FI01, which showed that domestic LSAW pipes could be used for submarine oil and gas pipelines.
