Shandong Yunyi Heavy Industry Co., Ltd is a manufacturer with ASME U and U2 certification. Its products cover columns/towers, tanks/drums, shell and tube heat exchangers, reactors, in C. S, SS and other materials. It can manufacture whole set of process equipment for refinery, chemical, rubber, steel, thermal power energy-saving and environmental protection industries. Yunyi is now a registered supplier of ExxonMobil, KBR, Entrepose, Enter, Sinopec, Petro China, CNOCC, etc.