... quality of the products, we imported many advanced equipments from Germany, such as AOD concise stoves, 650rolling mills, different types perforations, cold-drawn ... and so on. The specification of stainless steel seamless pipe is (6-580)x(1-30)x( ... environment-protection, boiler, heat-exchanger, pressure containers, water resources and electricity industry etc.1 304 bright annealing seamless steel tube