Guigang large-caliber square rectangular pipe size specifications and weight main functions and advantages The square pipe is composed of ordinary carbon steel square pipe and low alloy square pipe. Installation requirements Guigang's large-caliber thick-walled square pipe main use: It is strongly recommended to use a wire brush and other tools to grind the surface of large-caliber thick-walled square pipe to remove loose or scale, rust, welding slag, etc. The rust removal of hand tools can reach Sa2 level, and the rust removal of power tools can reach Sa3 level. If the surface of large-caliber thick-walled square pipes is firmly adhered with iron oxide scale, the rust removal effect of the tool is not ideal and cannot reach the depth of anchor pattern required by the construction. Specializing in the storage of thick-walled square pipes for Wang Huainan, the stacking layers of thick-walled square pipes should be paid attention to, so as to avoid excessive local stress on the pipe end, which will cause radial plastic deformation and layer damage of thick-walled square pipes. The recommended stacking layers of light pipes refer to APIRP 5L1-2009 "Recommended Practices for Railway Transportation of Thick-walled Square Pipes of Pipelines" or APIRP 5LW-2009 "Recommended Practices for Transportation of Thick-walled Square Pipes of Pipelines and Sea Ships", which can also be determined experimentally or according to thick walls The safe stacking height of square pipes is implemented, and the number of stacked layers is in accordance with GBT 23257-2009 "Polyethylene Layer for Buried Steel Pipelines". Query section shrinkage ratio ψ (%): ≥40 Guigang large diameter square rectangular pipe size specifications and weight main functions and advantages After spraying fluorocarbon paint. Installation process welding specification process test and process analysis, it is determined that double-walled CO2 gas shielded welding is used for butt welds of large-caliber thick-walled square pipes. The welding material is H08Mn2SiA, 2mm wire; the shielding gas is pure CO2 gas. The welding current of the layer weld is 200 ~ 250A, the first layer is 240 ~ 320A; the arc voltage is 24 ~ 26V. The technological requirements are that the layer welds must be completely welded, and the specifications and weight of Guigang's large-diameter rectangular pipes ensure that the back is well formed; the welding current, arc voltage, wire feeding speed and welding speed can be adjusted according to the equipment model. Good product wins good reputation
Guigang large-diameter rectangular tube size specifications and weight of the main functions and advantages of species currently use more nominal wall thickness options. General classification of ordinary steel a. Carbon structural steel: (a) Q19 (b) Q215 (B); (c) Q235 (C); (d) Q255 (B); (e) Q275. Q345B thick-walled square pipe products use: machinery and equipment, solar equipment, steel structures, automotive parts, bridge ground piles, guardrails, ship internal structures. Ordinary carbon steel wire bushings (GB3 0-8 are steel pipes used to protect electric wires in electrical and industrial installations such as industrial and civil buildings, installation of machinery and equipment. Generally speaking, in Guigang, welding of large-caliber thick-walled square pipes has a process: ignition , Pressurization, heat preservation. When the pursuit of excellence is greater than 20mm, L = 20mm. Precision steel pipes are products that have appeared in recent years, mainly due to strict tolerances and roughness of the inner hole and outer wall dimensions. Good process for large diameter rectangular pipes The classification of large-diameter rectangular pipes is divided according to good technology: hot-rolled seamless square pipes, cold-drawn seamless square pipes, seamless square pipes, and welded square pipes. Among them, the welded square pipes are divided into: Arc welding square tube, resistance welding square tube (high frequency, low frequency), gas welding square tube, furnace welding square tube (b) divided by welding seam-straight seam welding square tube, spiral welding square tube large diameter rectangular tube material classification Square tubes are divided according to material: ordinary carbon steel square tubes, low alloy square tubes. Common carbon steel is divided into: Q19 Q2 Q23 SS400, 20 # steel, 45 # steel, etc .; low alloy steel is divided into Q34 16Mn, Q390, ST52-3 Etc. The advantage of the average method of Songyuan empty bending is that it can bend the side length when the real bending cannot be performed, and the large-caliber square moment of Guigang Standards, such as the simultaneous bending and finishing of the top and side of the rectangular tube. The empty bend can also bend the inner angle of R <0.2t without breaking the wall. Guigang large-caliber rectangular tube dimensions and weight. Main functions and advantages The tensile force (σb) obtained by dividing the amount of force (Fb) that the sample is subjected to during the tensile process by the original cross-sectional area (So) of the sample is called tensile strength (σb), and the unit is Nmm2 (MPa). It indicates the large capacity of the metal material under the action of tension. The strength, plasticity, and hardness discussed earlier are pointers to the mechanical properties of the metal under static load. In fact, many machine parts are under cyclic loading Work under these conditions, the parts will be fatigued under these conditions.
Guigang large-diameter square rectangular pipe size specifications and weight main functions and advantages When processing thick-walled square pipes, it needs to be properly polished to ensure durability, smoothness, etc. There are several types of polishing of general stainless steel profiles: mechanical polishing, chemical polishing, and electrochemical polishing. The pursuit of excellence Precision steel tubes are products that have appeared in recent years, mainly due to strict tolerances and roughness of the inner hole and outer wall dimensions. Large-caliber square-rectangular pipe good process classification Large-caliber square-rectangular pipe is classified according to good process: hot-rolled seamless square pipe, cold-drawn seamless square pipe, seamless square pipe, and welded square pipe. Among them, the welding square pipe is divided into: (a) according to the process-arc welding square pipe, resistance welding square pipe (high frequency, low frequency), gas welding square pipe, furnace welding square pipe (b) according to the weld-straight Material classification of seam welded square tube, spiral welded square tube, large diameter square rectangular tube, square tube is divided by material: ordinary carbon steel square tube, low alloy square tube. Ordinary carbon steel is divided into: Q19 Q2 Q23 SS400, 20 # steel, 45 # steel, etc .; low alloy steel is divided into Q34 16Mn, Q390, ST52-3 and so on. Everyone can see that pig iron refers to a product made by smelting iron ore in a blast furnace, which is mainly used for steelmaking and square casting. Putting cast pig iron in a molten iron furnace, you can get cast iron (liquid), which is cast into a square tube of castings. Guigang's large-caliber square moment management theory weight, this type of cast iron is called cast iron. Large diameter electric welded square pipe for low pressure fluid transportation, standard number is GBT14980-1994. Represents material Q235AB grade. It is mainly used to transport low-pressure fluids such as water, sewage, gas, air, and heating steam. The load acting on the machine at a great speed is called impact load, and the ability of metal under impact load is called impact toughness. Prestige guarantees the detailed steps of cutting large-caliber thick-walled square pipes. Thick-walled square pipes are widely used in our lives. Therefore, in the subsequent application process, the requirements for thick-walled square pipes are also very strict in many places, especially It is more and more attention to surface treatment. Today we will briefly introduce to you how the polishing process should be performed.