category：Building materials / date：2023-06-24 10:47:08 / browse：150 / comment：6
Tool derusting mainly uses tools such as steel wire brush to polish the surface of square pipe, which can remove loose or oxidized scale, rust, welding slag, etc. The derusting of manual tools can reach grade SA and that of power tools can reach grade SA. If the square pipe surface is firmly attached with iron oxide scale, the derusting effect of tools is not ideal and can not reach the anchor depth required by construction.Cleaning solvent and emulsion can clean the surface of square tube to remove oil, grease, dust, agent and similar organic matter, but it can not remove rust, scale, welding, etc. on the surface of square tube, so it is only used as an auxiliary means in production.San Rafael,Steel with chromium content of more than % in steel and high corrosion of external medium (acid, alkali salt) is called square pipe. According to the condition in steel, square tubes can be divided into martensite,San Rafael88 galvanized, ferrite, austenite and ferrite & mdash; Austenite type, precipitation hardening square tube, according to the standard gb & mdash; regulations, a total of regulations.Plasticity QB square plasticity refers to the ability of metal materials to produce plastic deformation (deformation) without deformation under load.Oqtosh,During the pushing process of spot welding and repair welding elbows, there will be thinning, so manufacturers usually use thick spot pipes. If thin raw materials are used, the products produced must be unqualified. Generally, there are about wires thinned. If the technology is not good or the drawn pipe is used, square rectangular tube, seamless square tube, galvanized square tube, galvanized tube, old brand, price advantage and quality guarantee! However, the Demander shall cut off the interface pipe when using it. The weight of short length and non fixed length products shall not exceed % of the total delivery. For qb square pipe with theoretical weight greater than kgm, it shall not exceed % of the total delivery. The bending degree of qb square pipe shall not be greater than mm per meter, and the total bending degree shall not be greater than .% of the total length. Galvanized qb square pipe for low-pressure fluid transmission, with standard number of gbt-. Representative materials: QA qbqb, etc. It is mainly used for conveying water, air, oil and heating hot water or steam, and its purpose is limited to general low pressure fluid.In this period, the technology of continuous rolling pipe was not mature.
If there is only a single plane weld, the step-by-step back welding shall be adopted from the middle,San RafaelQ235A square tube, that is, it is necessary to distinguish the carbon equivalent of the qb square tube, and the carbon equivalent of the qb square tube is the same. If the carbon equivalent of Q is less than .%, it can be said that the weldability is OK. Generally speaking, the cold crack increases when the carbon equivalent is .%.Generally, chemical and electrolytic methods are usedFor more, please check,With the improvement of production quality, the quality of square tubes is getting better and better. The quality of square tubes will affect our lives. Because the functions of square tubes are different their characteristics and uses are different. I will introduce the characteristics and uses of square tubes in detail.Pull square tube:For gas transmission: gas, steam and liquefied petroleum gas.
Because the green billet can be pressed into any shape, it is easy to weld the square tube into difficult products.Product line,Stage ( & mdash; )Performance index analysis of square tube - strength refers to the performance of metal materials under static load. Since the action modes of load include tension, compression, bending and shear, the strength is also divided into tensile strength compressive strength, flexural strength and shear strength. There is often a certain between various strengths. Generally tensile strength is used as the basic strength indicator.Square tube nonferrous metals, also known as non-ferrous metals, refer to metals and alloys other than ferrous metals, such as copper, tin, lead, zinc, brass, bronze, aluminum alloy and bearing alloy. In addition, chromium, nickel, manganese, molybdenum,San RafaelHot dip galvanized iron pipe, 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, 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.San Rafael,The second is the pickling of the square pipe. Both chemical and electrolytic methods are used when pickling the square pipe. These two methods can remove the oxide skin of the square pipe.In this period, the technology of continuous rolling pipe was not mature.Steel used & mdash& mdash; Such as bridge steel, ship steel, boiler steel, pressure vessel steel, agricultural machinery steel, etc.