New-South-MemphisQ235 galvanized square pipeWhat kind of packaging methods are divided into

Now, with the continuous development of q355b square tube, its use is becoming more and more extensive, we still look forward to the development of q355b square tube in the future.

The advantage of empty bending is that it can bend the side length when the real bending cannot be carried out, such as synchronous bending and finishing of the upper side and side of q355b square tube. Empty bending can also bend the inner corner of r0.2t without fracture of pipe wall. The disadvantage of empty bending is that when the upper side and side are synchronous empty bending, due to the pressure generated by the upper roll and the lower roll at the same time, the forming force is easy to exceed the critical point, resulting in edge instability and concave, such as synchronous bending and finishing of the upper side and side of q355b square tube. Empty bend can also bend R & amp; amp; amp; lt; 0.2T without fracture of pipe wall.

With the development of economy, there are a lot of demands for project construction, which leads to the continuous increase of square pipe. The of square pipe is more complex. Great efforts should be made in the selection of raw materials, structured treatment and so on.

.The painting of the square tube has to go through a process, which requires us to conduct comprehensive consideration and analysis. In particular, the quality and level of the paint and the relevant technical level deserve our attention. Note that the square tube should not be used immediately after painting, but should be placed for a period of time and wait until the paint is dry!

It is mainly caused by the fact that the square pipe body has no cover, the covering protection is not ideal, and there is no support, partly due to the excessive number of stacking layers, and most coastal areas belong to marine climate with large annual rainfall, high air humidity, ponding in the square pipe and the square pipe. The protection shall be: if the bare pipe or pipe needs to be stored for a long time, it shall be protected with an uncovered object from the beginning of storage to avoid rusting, layer aging, edge warping and other phenomena of the square pipe.

The standard number of spiral square pipe (standard of the Ministry of petroleum) for low pressure transmission is syt5037-2008. The representative materials are q235bq345b and other carbon steel materials. It is mainly used for low-pressure transmission of water, oil, natural gas, heating and other pipelines.

According to production, square tubes are divided into hot-rolled tubes, cold-rolled tubes, cold drawn tubes tubes, pipe jacking, the square tube is divided into round and special-shaped. The special-shaped tube has many complex shapes, such as square, oval angular, angular, melon seed, star and winged tube.

Square tube has a wide range of application fields. Its main field is the construction industry, which promotes the development of economic construction. Because the production process of square tube hole is different, the production design of square tube hole is also different. Next, I will introduce in detail the types of tube hole design below.

Large diameter welded square pipe for low pressure fluid transmission, Standard No.: gbt14980-1994. Representative material: q235ab grade. It is mainly used to transport low-pressure fluids, such as water,New-South-Memphis114 galvanized square pipe, sewage, gas, air and heating steam.

Job description.Be sure to select special for square pipe cutting.

In the case of dynamic load, plastic design usually calculates the allowable stress according to the safety factor that the allowable stress is not less than the dynamic load and multiplied by the allowable stress. In the case of bending of an axis, it can be calculated by the formula a = W. replacing the calculated strength with plasticity can improve the bearing capacity of the member by 14%.

From the perspective of production, we should give full play to the productivity of production equipment and reduce the consumption of fuel and equipment on the basis of meeting the size and performance requirements of q355b square tube. Therefore, the temperature of no open forging and final forging is a comprehensive technical and economic problem. If qualified q355b square tubes can be obtained in the temperature range of the vehicle, reasonable process procedures should be selected from an economic point of view. Obviously, the higher the temperature, the easier the forging and the higher the productivity, but the greater the fuel consumption and the loss of the heating furnace; We should consider these two aspects and make a reasonable choice.

The general delivery length of square pipe is 3200mm-13000mm, mostly 65000mm and 13000mm. The square tube is allowed to deliver short and non fixed length products not less than 2300mm, or in the form of interface tube, but the Demander shall cut off the interface tube when using it. The allowable deviation of the wall thickness of square pipe shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is not greater than 10mm, plus or minus 8% of the wall thickness when the wall thickness is greater than 10mm except for the wall thickness of corners and weld areas. The weight of short gauge and non fixed gauge products shall not exceed 8% of the total delivery. For square tubes with a theoretical weight greater than 20kgm, it shall not exceed 5% of the total delivery. We have many different ways in square tubes. Different ways make square tubes have different characteristics. According to these characteristics, we can correctly select the appropriate application field, In this way, the use efficiency of square tube can be improved. Next, we will mainly explain the characteristics of pipe cooling technology below. What are the main characteristics of square tubes? Square tube parts have accurate dimensions and smooth surfaces: the dimensional accuracy of cold parts developed at present can reach grade 8 ~ 9. If ideal ones are adopted, their accuracy is second only to that of fine polished surfaces. Therefore, cold parts generally do not need to be reprocessed, and a small amount only need finishing (grinding).

Honesty and mutual benefit.Forging has many advantages in improving the plasticity of q355b square tube and improving the quality of steel because the cast state of forged metal can be broken when forging q355b square tube. Therefore, there are forging workshops in some q355b square tube factories.

The principle of straightening machine is that a disc is divided into two sides to clamp round steel straight lines. Professional square tube, square rectangular tube, seamless square tube, galvanized square tube, galvanized tube,New-South-MemphisHigh pressure seamless square tube, high price, 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 R2. The diameter of the reinforcement to be straightened is D, and the center distance between them is adjusted to R1 + R2 + D.

The test can be carried out under cold and hot conditions. If the test temperature is not specified, the test shall be carried out under normal temperature, but not lower than - 10 ℃.

New-South-Memphis.The calculation method theory of square tube mechanics is feasible to calculate static structures, such as warehouses, houses and bridges, but it is not suitable for moving components such as wheels. At this time, people often use the plastic theory. The research of the plastic theory can be traced back to 1914. In 1975, the European Design Association formulated D plastic design code, the requirements are as follows:% 26sigma; B% 26sigma;% 26zeta;% 26ge;% 26delta;% 26ge; 15% for high-rise buildings, more detailed calculation is required. In the case of plastic design, the allowable stress is usually calculated according to the safety factor that the allowable stress is not less than the dynamic load and multiplied by the allowable stress. In the case of bending of an axis, which is not a straight q355b square pipe, also known as welded pipe, is a square pipe welded by steel plate or strip steel after crimping. Q355b square tube has the advantages of simple production process, high production efficiency, many varieties and specifications and less equipment. The commonly used materials are Q235A and Q235C.

The calculation method theory of square tube mechanics is feasible to calculate static structures, such as warehouses, houses and bridges, but it is not suitable for moving components such as wheels. At this time, people often use the plastic theory. The research of the plastic theory can be traced back to 1914. In 1975, the European Design Association formulated D plastic design code, which is mainly used for plane beams under static load and bending stress For the frame structure with stress, the requirements are as follows:% 26sigma; B% 26sigma;% 26zeta;% 26ge;% 26delta;% 26ge; 15% for high-rise buildings, more detailed calculation is required. In the case of plastic design, the allowable stress is usually calculated according to the safety factor that the allowable stress is not less than the dynamic load and multiplied by the allowable stress. In the case of bending of an axis, the formula a = w can be used Using plasticity instead of calculated strength can improve the bearing capacity of members by 14%.