... of water works for making repair. Ductile iron pipe repair clamp is used for ductile iron pipe water works for making repair, it ... on joint and flange joint, it comprise bolts, nuts, ductile iron pieces and rubber seal. --Ms. Livia WangQINGDAO VALTECH MANUFACTURING CO ... . Jihongtan Town, Chengyang District, Qingdao City, Shandong Province, China Ductile Iron Repair Clamp