Shandong Zhongzheng Steel Pipe Manufacturing Co., Ltd was established in 2006 year. It covers an area of 68'000 square meters and has more than 300 employees which include 16 senior experts and 32 technical staff.
Enterprise has already through ISO9001/API 5L/5CT Certificate. For more information you can check our website: http://www.made-in-china.com/showroom/caroline-1/ http://www.made-in-china.com/showroom/caroline-1/