Supply plant _ Liaocheng thick-walled tube thick-walled tube 1. The hot-rolled seamless steel pipe manufacturing process (extruded seamless pipe): round tube → heating → perforation → three-roll rolling, rolling or extrusion → detached → sizing (or reducing) → cooling → straightening → hydrostatic test (or testing) → mark → storage of raw materials is rolled seamless round tube, tube embryos to go through cutting the growth of the cutter about 1 meter blank, and by conveyor belt to the furnace heating. Heating the billet is fed into the furnace, the temperature is about 1200 ℃. The fuel is hydrogen or acetylene. Furnace temperature control is the key issue. After the round tube came to pass through air pressure punching machine. Generally more common punch is tapered roller puncher, punch this high production efficiency, product quality, perforated expanding capacity, can wear a variety of steel grades. Perforation, round tube has been three-roll rolling, rolling or extrusion. After pressing to take off pipe sizing. Sizing machine rotating at high speed through the cone drill steel embryo into perforated pipe is formed. Pipe inner diameter is determined by the outer diameter of the sizing machine drill length. After the pipe after sizing, into the cooling tower through spray cooling, steel after cooling, it will be straightened. Steel belt sent by straightening metal detection machine (or hydrostatic test) for internal testing. If the internal pipe cracks, bubbles and other issues, will be detected. After the pipe through strict quality control but also picked by hand. After the steel quality inspection, spray paint on number, size, batch number and so on. By a crane into the warehouse. 2. Cold drawn (rolled) seamless steel pipe: round tube → heating → perforation → Heading → annealing → pickling → oiled (copper) → multi-pass cold drawn (cold) → billet tube → heat treatment → straightening → hydrostatic test (testing) → mark → storage. Seamless tube production categories - hot-rolled tubes, cold-rolled, cold-drawn tubes, squeeze tubes, pipe jacking 1. Structural seamless steel pipe (GB / T8162-1999) is used for general structural and mechanical structure of the seamless pipe. 2 fluid seamless steel pipe (GB / T8163-1999) is generally seamless for conveying water, oil, gas and other fluids. 3. The low-pressure boiler seamless pipe (GB3087-1999) is used to manufacture various structural low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam locomotive boiler tubes, opium pipe, small pipe and arch brick effective high-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless steel pipe. The high-quality carbon steel high-pressure boiler seamless pipe (GB5310-1995) is used to manufacture high-pressure and more pressure water tube boiler heating surface with steel, alloy steel and heat-resistant stainless steel seamless steel tubes. 5. Fertilizer equipment high pressure seamless steel pipe (GB6479-2000) is applicable to operating temperature -40 ~ 400 ℃, working pressure of high-quality carbon structural steel and alloy steel 10 ~ 30Ma of chemical equipment and pipeline of seamless steel tubes. 6. oil cracking seamless pipe (GB9948-88) is applicable to the oil refinery furnace tubes, heat exchangers and pipe seamless steel pipe. 7. Geological Drilling Pipe (YB235-70) is for geological department of the steel core drilling, use can be divided into the drill pipe, drill collar, core pipe, casing and precipitation tubes. 8. Diamond core drilling seamless pipe (GB3423-82) is to drill, core rods used for diamond core drilling seamless steel pipe casing. 9 oil drilling pipe (YB528-65) is used to thicken the oil drilling within or outside the thick ends of seamless steel tubes. Steel sub-threading and not two, Threading Pipe Fittings links, no threading methods and tools useful butt joint connection. The raw material is rolled seamless round tube, tube embryos to go after cutting a length of about one meter cutter blank, and by conveyor belt to the furnace heating. Heating the billet is fed into the furnace, the temperature is about 1200 ℃. The fuel is hydrogen or acetylene. Furnace temperature control is the key issue. After the round tube came to pass through air pressure punching machine. Generally more common punch is tapered roller puncher, punch this high production efficiency, product quality, perforated expanding capacity, can wear a variety of steel grades. Perforation, round tube has been three-roll rolling, rolling or extrusion. After pressing to take off pipe sizing. Sizing machine rotating at high speed through the cone drill steel embryo into perforated pipe is formed. Pipe inner diameter is determined by the outer diameter of the sizing machine drill length. After the pipe after sizing, into the cooling tower through spray cooling, steel after cooling, it will be straightened. Steel belt sent by straightening metal detection machine (or hydrostatic test) for internal testing. If the internal pipe cracks, bubbles and other issues, will be detected. After the pipe through strict quality control but also picked by hand. After the steel quality inspection, spray paint on number, size, batch number and so on. By a crane into the warehouse. Tai Cheung Liaocheng in Shandong Steel Pipe Co. ___ supply plant _ Liaocheng thick-walled tube thick-walled tube