New forming technologies used in manufacturing large vessels

In this paper, some new forming technologies such as the forming of curved shell using reconfigurable discrete die, the precision bending of large flange with a complicated shape of the cross section, the integrated hydro-bulge forming (IHBF) method for manufacturing LPG spherical tank and the method of machining seal surface of large flange using a multifunction machine tool is introduced. The practical applications of the above-mentioned method in manufacturing different vessels are also given.