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Today, all fields are coming rapidly, which makes the demand for square tube higher and higher, and the requirements of customers for square tube higher and higher. Now we are studying a new square tube. The following mainly introduces the performance of square tube in tensile strength.
The standard number of square pipes for transporting flammable and non flammable fluids is gbt97 1 (gbt97 - 199 represents steel for l245-l4 and other pipelines. It is mainly used for transporting flammable and non flammable fluids, with high requirements.
Mr. yuktaedong.Material classification of spiral welded square pipe square pipe is divided into ordinary carbon steel square pipe and low alloy square pipe according to material. Ordinary carbon steel is divided into Q19 Q2 q23 SS400, 20# steel, 45# steel etc; Low alloy steels are divided into q34 16Mn, Q390, St52-3, etc.
Steel with chromium content of more than 5% 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, ferrite, austenite and ferrite & mdash; Austenite type, precipitation hardening square tube, according to the standard gb3280 & mdash; 92 regulations, a total of 55 regulations.
.It is learned from the authority that if there is dirt on the outer surface of the square pipe during degreasing, it can be washed with purified water and dried naturally, then soaked with degreasing agent with a dry cloth to remove the oil, and then dried in the open air. When degreasing the inner surface of the opposite pipe, the end of the pipe can be tightly blocked with a wooden plug or closed with other. The degreasing solvent with the volume of 15% - 20% of the pipe from the other end shall be sealed with a wooden plug, placed in a flat and clean place or on a workbench with sleepers for 60-80min, and the pipe shall be rotated every 20min. If degreasing is required for stainless steel elbow, degreasing solvent shall be appropriately added to make it fully soaked. After degreasing, pour out the solvent in the pipe, or dry it with oil-free compressed air or nitrogen, or dry it with natural air. Large diameter pipes can be manually scrubbed with cotton cloth dipped in solvent; The square tube can also be soaked in a long tank containing solvent for 60 to 80 minutes. The concentrated pipeline and equipment of the concentrated unit can be directly pumped and circulated with 88% concentrated for pickling after all installation. Pipes that cannot circulate or are not resistant to concentrated corrosion must be degreased separately.
Among them, q355b square tube is divided into process & mdash& mdash; Arc welded square pipe, resistance welded square pipe (high frequency and low frequency), gas welded square pipe and furnace welded square pipe are divided by weld & mdash& mdash; Straight seam welded square pipe, spiral welded square pipe.
Square tubes can be degreased with organic solvents (vinyl chloride, vinyl chloride, carbon chloride, benzene, acetone, etc.) concentrated or alkaline solution. Industrial vinyl chloride is suitable for degreasing metal parts; Industrial chlorinated carbon is suitable for degreasing ferrous metal and non-metallic parts; Vinyl chloride is suitable for degreasing metal parts and non-ferrous metal parts; The industrial concentration shall not be less than 86%, which is suitable for manual scrubbing of the inner surface of the container with low degreasing requirements; 88% concentration,Mr. yuktaedong50 stainless steel square tube, applicable to the concentration of some pipe fittings and porcelain rings of concentration device
Do a good job in the following aspects to effectively improve the use of square tubes
The load of impact toughness acting on the parts at a great speed is called impact load. It is specialized in products and renewable resources. Its business includes: square tube, square tube,Mr. yuktaedong80m3 galvanized square pipe, seamless square tube, galvanized square tube and galvanized tube. The ability of metal under impact load is called impact toughness.
Reach or even exceed the level of resistance welding cold formed square pipe. The size of R angle is generally between 2-3 times of the wall thickness. R angle square pipe of the size required by customers can also be produced according to customers' needs; Square pipe is a kind of long steel with hollow section and no joints around. It is a square pipe formed by four sides of seamless pipe mold. Square pipe has hollow section, professional square pipe, square rectangular pipe, seamless square pipe, galvanized square pipe, galvanized square pipe, strict inspection and quality assurance. The preferential activity is in progress. Welcome to consult. A large number of pipes are used for conveying fluid. They are mainly used in conveying, hydraulic support and mechanical structure, Medium and low pressure, high pressure boiler tubes, heat exchange tubes, gas, oil and other industries. It is stronger than welded and will not crack.
production costs.Square tube is a kind of square tube, which is rolled by strip steel after process treatment. Many kinds of materials can form a square tube body. It is used for what purpose and where. Most square tubes are steel tubes, mostly structural square tubes, decorative square tubes and building square tubes. Generally, the strip steel is unpacked, leveled, crimped and welded to form a circular tube, which is rolled into a square tube and then cut to the required length. Usually 50 pieces per bag.
The selected punch and die fillets are related to the magnitude and distribution of stress
In the heat exchange planning of metallurgy, petrochemical and other occupations, there are various forms of heat exchangers but the conventional heat exchangers have many disadvantages, such as poor heat exchange, difficult cleaning, large dust thermal resistance and so on, which can not meet the needs of production customers. The square tube heat exchanger based on square tube throat has the advantages of excellent heat exchange, easy cleaning, small dust thermal resistance and compact structure.
When 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, please use a rag or cloth to clean the oil on the surface of the square tube Sundries or soil shall be completely clean.
High quality and low price.At present, there is still a lack of research on surface adhesion, there is no systematic and perfect theory to guide the preparation of anti adhesion inner surface of pipeline, and there is a lack of operable and low-cost inner surface preparation technology of square pipe. In terms of solid surface adhesion mechanism, based on the solid-liquid interface adhesion work theory and smooth solid surface model this paper analyzes the spreading process on machined rough surface, studies the dynamic movement characteristics of solid-liquid vapor phase line, directly analyzes the adhesion process,Mr. yuktaedongGalvanized square pipe equipment manufacturer, and establishes a line spreading model based on small system energy, It provides theoretical guidance for the preparation of anti adhesion surface of pipeline.
The general delivery length of q355b square pipe is 4000mm-12000mm, mostly 6000mm and 12000mm. Q355b square tube is allowed to deliver short length and non fixed length products not less than 2000mm, or in the form of interface tube
Elongation after square tube breaking (& sigma;): in the tensile test, the percentage of the length increased by the gauge length of the sample after breaking and the length of the original gauge length is called elongation. In & sigma; Expressed in%.
Mr. yuktaedong.Square tube is in our reality
The analytical technology of square tube sizing rolling. When sizing rolling is adopted, because there is no tool on the inner surface, the shape of the inner surface of the rolled material is not neat when rolling the tube. When the roll mill is used, the inner surface of the rolled material is angular. The occurrence mechanism of this phenomenon and the countermeasures to be taken are clarified by using the three-dimensional finite element method.
Square tube saves raw materials: the material rate of cold parts can usually reach more than 80%. For example, the material rate of pin cutting of brand automobile is 43%, while the material rate when cold is used is increased to 92%; For another example, after the universal joint bearing sleeve is changed to cold, the material rate is increased from 28% in the past to%. It can be seen that the use of cold production of mechanical parts can save a lot of steel and non-ferrous metal materials.