#12288;Nanjing zhongkuan metal material co.,Ltd is a professional machining and trade of seamless steel pipes. Our company are agent of the iron&steel group.we supply the Fluid class pipe,structure pipe,high middle low pressure boiler tube and power plant,petrochemical,and oil&gas various materials alloy pipe.GB/T97113.3-2005 enforce the highest standards and the domestic standard API American Petroleum Association.   For many years,our products are not only well domestic ,but also exported with reputation to many countries and regions for project con-struct.