Qingdao Yuanding High Alloy Tube Manufacturing Co., Ltd (hereinafter called QDYD) situates in the famous coastal tourist resort---Qingdao. QDYD specializes in R&D of high-temperature alloy centrifugal casting tubes, static castings and precision castings, whose products are widely used in the following industries: in glass manufacturing industry, such like lift-out table rollers, regulating rollers, annealing lehr rollers, bending rollers for Glaverbel glass and pattern rollers etc.; in metallurgical industry, like cold roll silicon steel CAL(continue annealing line), cold roll band steel CAL, stainless steel CAL, CGL( continue galvanizing line) and radiant tubes, hearth rollers, carbon-cover rollers, sink rollers, stabilizing rollers, hot bridle rollers as well as cobalt alloy slide block etc. used in various annealing furnaces; in petrochemical industry, there are hydrogen–making reformer tubes used in oil refining and ammonia synthesizing, methanol installation reformer tubes, ethylene cracking furnace and all kinds of castings in furnace.