Hebei Zhonghai Steel Pipe Manufacturing Co.,Ltd We are the professional manufacturer of seamless steel pipe Main product 1.Carbon Seamless Steel Pipe(outside diameter 21mm-1220mm, wall thickness max 60mm), 2.Spiral Weld Pipe(219mm—1220mm), 3.ERW Steel Pipe(219mm—1220mm), 4.API 5L Gr.B/X42/X52/X60 material pipe etc. Should you have any questions,pls do not hesitate to contact me. Thanks and best regards Sara Hebei Zhonghai Steel Pipe Manufacturing Co.,Ltd Tel:+86-317-6302637 Fax:+86-317-6302957 Mobile:+86- 13383373726 E-mail:pipeline@hbzhonghai.com Gmail：hbzhsara@gmail.com Website:www.zh-steelpipe