Beijing Institute of Petrochemical Technology,Beijing, 102617;
Beijing Institute of Petrochemical Technology,Beijing, 102617;
Beijing Institute of Petrochemical Technology,Beijing, 102617;
Beijing Institute of Petrochemical Technology,Beijing, 102617;
Beijing Institute of Petrochemical Technology,Beijing, 102617;
Beijing Institute of Petrochemical Technology,Beijing, 102617;
spiral welded pipe; contact effect; stress field; temperature field; finite element analysis;