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. 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. Company with a good reputation, won the trust of high-quality steel pipe products. Welcome new and old customers came to negotiate cooperation Hebei billions of Steel Pipe Manufacturing Co., Ltd. professional production and processing of hot-rolled steel pipe (seamless steel pipe): The product is made of high quality steel coil, after passing reinspection the slitting or with volume automatically forming and welding, computer control best fusion temperature, remove the steel pipe inside and outside burr minimal oxidation of the atmosphere as a whole, non-destructive testing qualified steel heated to 910 ℃ -950 ℃ baked, in addition to the multi-channel scales through the stretch reducing mill times rolling, the microstructure of the steel pipe throughout the full uniform grain state, geometry and mechanical properties. Products perform API SPEC 5L, API SPEC 5CT, EN10217 standard. The products are widely used in flammable and non-flammable fluid pipes and boilers, steel structure. Welcome to the new and old customers to negotiate and cooperate