As one of leading manufacturers of steel pipe in hunan, Hunan Great Steel Pipe Co.,Ltd have enjoyed good reputation for many years for superior quality and lowest price. we now have RMB 800 million assets, the annual sales is up to 600 million, and our warehouse is more than 20,000 square meter. so we can delivery in time. All the production process are made under the ISO9001:2000 strictly.We mainly produce ERW steel pipe, Spiral steel pipe, Seamless steel pipe. Square steel pipe, Galvanised steel pipe and so on.And the steel grade we often use Q195-Q345, ASTM A252.GR.A, B, C. A53-A369,...