Now， Fangguan can achieve such good results in the market， which is completely inseparable from the manufacturers hard work in technology. I believe that the Fangguan market will be better and better in the future.
2After the sample is flattened to the specified flattening distance h， square moment tube， seamless square tube， galvanized square tube，Q355B方管 galvanized tube， high price sales， door-to-door service， on-site settlement， honest operation! The edge is one with radius r， and the other outer edge must be two equal diameters with radius R. The diameter of the reinforcement to be straightened is D， and the center distance between them is adjusted to R + R + D.
Square pipes are mainly used in engineering buildings， glass curtain walls， door and window decoration， steel structures guardrails，Q355B方管 machinery， automobiles， household appliances， containers， electric power， agricultural construction， agricultural greenhouses， bicycle frames， motorcycle frames， shelves，Q355B方管 fitness equipment， leisure and tourism， steel furniture， various specifications of oil casing， oil pipes and pipeline pipes， water， gas， sewage， air Heating and other fluid transportation， fire fighting and support，方管,方矩管,无缝方管,镀锌方管,镀锌管-无锡嘉航金属制品有限公司 construction and other fields.
GReynosaFirst， remove the deposits on the surface of the square pipe surface with copper wire brush. Use the perfume oil or other scrubbing oil on the surface layer， or use phosphate or chromate solution， brush， spray or dip coating. After the fixed reaction time， rinse the acid solution with plenty of fresh water on the surface.
QsWhen cutting the square tube， there will be deformation， uneven incision and crack of the incision. What should we pay attention to when cutting the square tube and how to operate it? Today， I will introduce some problems that should be paid attention to when cutting the square tube. If the correct operation will make the square tube cutting work very smooth， please use a rag or cloth to clean the oil on the surface of the square tube Sundries or soil shall be completely clean.
Hot rolled qb square tube continuous casting slab or blooming slab is used as raw material， heated by stepping heating furnace and descaled by high-pressure water into roughing mill. Roughing material enters finishing mill after head cutting， tail cutting and then computer rolling. After final rolling， it is rolled into straight hair coil through laminar cooling and coiler. The head and tail of straight hair curl are often tongue shaped and fish tail shaped， and there are often defects such as wave shape， hem， tower shape and so on. The coil weight is heavy and the inner diameter of the steel coil is mm.
After the square pipe is produced， the surface treatment is generally carried out， that is， rust， dirt and attachments on the surface of the square pipe are removed. Those that cannot be treated by physical treatment should be treated by chemical treatment.
wAfter spraying (throwing) derusting， it can not only expand the physical adsorption on the pipe surface， but also enhance the mechanical adhesion between the layer and the pipe surface. Therefore， spray (throwing) derusting is an ideal derusting method for pipelines. Generally speaking， shot blasting (sand) is mainly used for the inner surface treatment of the pipe， and shot blasting (sand) is mainly used for the outer surface treatment of the pipe. Several problems should be paid attention to in derusting by spraying (throwing).
DSpiral square pipe for low-pressure transmission (standard of the Ministry of petroleum)， oil， natural gas， heating and other pipelines.
LCredit guaranteeClassification of wall thickness square tubes are divided into super square tubes square tubes and thin-walled square tubes according to wall thickness. Gbt-gbt-gbt-， JG - ASTM A， JIS gen or technical agreement.
xZWith the progress of the times， square tubes are used in more and more fields， and their scope of use is obviously increasing， which makes us have many kinds of square tubes. At this time， we need to store square tubes reasonably. Customers should also learn to arrange reasonably when storing square tubes. Lets understand how to store square tubes correctly.
The inner and outer walls of the pipe shall retain the original surface without any processing.
Common specifications of square tube: ~ & times; × .～ × × .～ × × .～ × × .～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～ × × ～
Welcome calls jSoft blowing treatment of molten steel after calcium treatment can reduce residual inclusions in molten steel and better wrap MNS around al CAS and other cores.
USquare tube nonferrous metals， also known as non-ferrous metals， refer to metals and alloys other than ferrous metals， such as copper， tin， lead， zinc， aluminum， brass bronze， aluminum alloy and bearing alloy. In addition chromium， nickel， manganese， molybdenum， cobalt square tube， vanadium， tungsten， titanium， etc. are also used in industry. These metals are mainly used as alloy additives to improve the performance of metals. Tungsten， square tube titanium， molybdenum etc. are mostly used to produce cemented carbide for tools. The above non-ferrous metals are called industrial metals. In addition， there are precious metals: platinum， gold， silver and rare metals， including radioactive square tubes.
According to the welding specification， process test and process analysis， it is determined that the butt weld of QB square pipe adopts double-layer CO gas shielded welding. HMnSiA， mm welding wire for welding material; The shielding gas is pure CO gas. The welding current of layer weld is ~ A， and that of the second layer is ~ A; The arc voltage is ~ V. The process requirement is that the layer weld must be fully welded to ensure good back forming; The welding current， arc voltage， wire feeding speed and welding speed can be adjusted according to the equipment model.
aWhen we understand the causes of defects in the drawing process of qb square tube， we should constantly improve the technology in the subsequent production process， so that we can reduce the occurrence of defects.
tHWhen the square tube is processed， smoothness and. There are kinds of polishing for general stainless steel profiles， including mechanical polishing， chemical polishing and electrochemical polishing.
Therefore， QA is usually not preheated. However， when the plate is very thick， it should be preheated because it cools quickly. Once # steel was cracked by J welding. If the plate thickness is more than mm， there is a great risk of not preheating.