seamless stainless steel pipe 1.Grade:300 Series 2.Cerfitication:ISO, DNV, ... ,GB,GOST,EN ZHEJIANG PENGYE is professional manufacture of seamless stainless steel pipe and tube in China. 1.SIZE: OD from 6mm to ... ,medicine, food, energy,electric power, aeronautics and astronautics, environmental protection, boiler gas, war industry, machinery, nuclear power, construction, shipbuilding and etc ...