Hebei billions of Steel Pipe Manufacturing Co., Ltd. specializing in the production of seamless steel pipe 20 # seamless steel pipe, as well as a variety of materials structure enterprise specializing in the production of seamless steel tubes, seamless steel tubes, has many years of production experience. The company mainly produces specifications for the outside diameter 18-219mm seamless steel pipe, steel pipe material complete structural steel pipes, fluid steel tubes It may also be for customers to build a variety of large-diameter pipe, Hebei billions of Steel Pipe Manufacturing Co., Ltd. specializing in the production 20 # seamless steel pipe seamless steel pipe structure as well as a variety of materials enterprise specializing in the production of seamless steel tubes, seamless steel tubes, has many years of production experience. Specifications: 25 * 2.5,38 * 3.5, 48 * 4,57 * 3.5 76 * 4 89 * 4.5,108 * 4.5,133 * 4.5,159 * 6,168 * 8,219 * 6,273 * 7 325 * 8,377 * 10 426 * 12 main production specifications for the outside diameter 18-219mm seamless steel pipe, steel pipe material is complete, structural steel pipes, fluid steel tubes, a variety of large-caliber addition can also be customized for clients steel pipe, non-standard steel pipe, steel pipe products are produced by the implementation of national standards, applicable engineering, coal mine, textile, electricity, military and other fields. Steel pipe because of its manufacturing process is divided into two kinds of steel pipe and cold drawn (rolled) steel hot-rolled (extrusion). Cold drawn (rolled) tube circular tube shaped tube is divided into two kinds. Two process overview, hot-rolled (extrusion steel pipe): tube round → heating → perforation → three-roll cross rolling, and rolling or extrusion billet tube → detached → sizing (or reducing) → cooling → → straightening straight → hydrostatic test (or testing) → mark → storage. Cold drawn (rolled) steel: round tube → heating → perforated → Heading → annealing → pickling → oiled (copper) → pass cold drawn (cold rolled) → → heat treatment → straightening → hydrostatic blank tube test (testing) → mark → storage. The company mainly produces specifications for the outside diameter 18-219mm seamless steel pipe, steel pipe material complete structural steel pipes, fluid steel tubes It may also be for customers to build a variety of large-diameter pipe, Hebei billions of Steel Pipe Manufacturing Co., Ltd. specializing in the production 20 # seamless steel pipe seamless steel pipe structure as well as a variety of materials enterprise specializing in the production of seamless steel tubes, seamless steel tubes, has many years of production experience. Specifications: 25 * 2.5,38 * 3.5, 48 * 4,57 * 3.5 76 * 4 89 * 4.5,108 * 4.5,133 * 4.5,159 * 6,168 * 8,219 * 6,273 * 7 325 * 8,377 * 10 426 * 12 main production specifications for the outside diameter 18-219mm seamless steel pipe, steel pipe material is complete, structural steel pipes, fluid steel tubes, a variety of large-caliber addition can also be customized for clients steel pipe, non-standard steel pipe, steel pipe products are produced by the implementation of national standards, applicable engineering, coal mine, textile, electricity, military and other fields.