Glad to introduce our factory for you,we are Shandong Zhongzheng Steel Pipe Manufacturing Company, has been a professional manufacturer of carbon seamless steel pipes for many years.It was found in 2006 with 600 thiousands Ton of designed and manufactured and 25 hundread million sales income per year.We have passed ISO and API certificates, which can meet your needs very well. Feel free to contract to us With regards Shandong Zhongzheng Steel Pipe Manufacturing Company Website:www.zzpipe.cn or www.zz-pipe.com Sale Manager: Guangchao Liu Mobile phone : 86-15966264226 Office Number :86-635-2921987,Fax:86-635-8882844 E-M: [email protected]