... 7-5/8”, 7-3/4”, 8-5/8”, 9-5/8”, 10-3/4”, 11-3/4”, 13 ... one of the major exporters of OCTG and line pipe for crude oil and natural gas delivery in China, we topped ... amount of steel pipe among Hunan province in 2010 and 2011. And we will keep growing and expanding the global market ... - 720mm with wall thickness: 1mm - 120mm 4. Machining Tube and Others: OD: 6mm - 1200mm with wall thickness: 1mm - 200mm