TurrialbaQ355d rectangular tube manufacturerTackling key problems to increase the rate of success

Be sure to select special for square pipe cutting.

The general delivery length of q355b square pipe is 4000mm-12000mm, mostly 6000mm and 12000mm. Q355b square tube is allowed to deliver short and non fixed length products not less than 2000mm, or in the form of interface tube, but the Demander shall cut off the interface tube when using it. The weight of short length and non fixed length products shall not exceed 5% of the total delivery. For q355b square tube with theoretical weight greater than 20kgm, it shall not exceed 10% of the total delivery. The bending degree of q355b square tube shall not be greater than 2mm per meter, and the total bending degree shall not be greater than 0.2% of the total length. The square tube is classified according to the production process: hot rolled seamless square tube, cold drawn seamless square tube, seamless square tube and square tube.

Turrialba.Q345B square tube is a product appeared in recent years, which mainly has strict tolerance and roughness for the dimensions of inner hole and outer wall. Production process classification of large-diameter q355b square tube large-diameter q355b square tube is divided into hot-rolled seamless square tube, cold drawn seamless square tube, seamless square tube and q355b square tube according to production process. Among them, q355b square tube is divided into: (a) by 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 (b) are divided by weld & mdash& mdash; Material classification of straight seam welded square pipe and spiral welded square pipe large diameter q355b square pipe: plain carbon steel square pipe and low alloy square pipe. 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.

In terms of hot working, repeated upsetting and multi-directional rolling of ingot can not only reduce the level of carbide segregation in square tube, the drawing process of square tube is quite meticulous. For a long time, square tube, square tube, seamless square tube, galvanized square tube, galvanized tube and other brand products are provided with complete designated products and quality assurance. In the process of continuous development, square tube has also been processed more rigorously.

Square pipe is an important type of square pipe, which has great similarities with seamless steel pipe but it is different. Square pipe is of great use in square pipe, which is generally used in the field of building materials and pipes. Today we tell you about the painting of square pipe. In fact, most manufacturers need to do this function, not only painting but also galvanizing. Zinc will precede others The base material of the square tube is corroded. If painting is not for you, it will cost you two money. If painting, it is recommended that you brush the zinc rich primer, because you brush other paints, it will corrode quickly and then continue to corrode your zinc coating, so as to achieve the top coat on the zinc rich primer. In fact, you should brush the zinc rich primer before galvanizing

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.

The function index analysis of the square tube - the strength acts with great progress. The load on the parts is called the charge and trap load. The damage power of the square tube under the charge and trap load is called the charge and trap toughness.

Section shape classification square tubes are classified according to section shape: simple section square tubes & mdash& mdash; Square tube, rectangular tube and complex section square tube & mdash& mdash; Surface treatment classification of flower shaped square pipe, open square pipe, corrugated square pipe and special-shaped square pipe square pipe is divided into hot-dip galvanized square pipe, oil coated square pipe and pickling square pipe according to surface treatment. Square pipe is classified according to purpose & mdash& mdash; Square tubes for decoration, machine tools and equipment, machinery industry, chemical industry, steel structure, shipbuilding, automobile, steel beam and column and special purpose are classified by wall thickness & mdash& mdash; Super square tube, square tube and thin-walled square tube plasticity refers to the ability of metal materials to produce plastic deformation (deformation) without deformation under load.

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,TurrialbaPrice of square galvanized steel pipe, 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, 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, and a small amount only need finishing (grinding).

Installation materials.Before square tube forming,TurrialbaWill galvanized pipes rust, the strip steel shall be leveled trimmed, planed, surface cleaned, transported and pre bent.

The welded joints of square pipes are subject to on-line continuous ultrasonic automatic flaw detector to ensure the NDT coverage of spiral welds. If there are defects, it will automatically alarm and spray marks. The production will adjust the process parameters at any time to eliminate the defects in time.

The welding process of square tube is analyzed. The square tube is produced and processed at room temperature with strip steel as raw material. Square pipe can be divided into straight seam welded pipe, square pipe and spiral welded pipe. Due to the different uses of welded pipes, the standards of welded pipes are summarized in turn: galvanized q355b square pipe for low-pressure fluid transportation, and the standard number is gbt3091-2008. Representative materials: Q235A, q235bq345b etc. It is mainly used for conveying water, gas, air, oil and heating hot water or steam, plasticity and hardness discussed above are the indicators of the mechanical properties of metal under static load. In fact, many machine parts work under cyclic load, under which fatigue will occur.

Quotation sheet.It is recommended that the galvanized surface be primed with epoxy zinc yellow primer.

After spraying (throwing) derusting, 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).

Performance index analysis fatigue of square tube the strength, plasticity and hardness discussed above are the indicators of the mechanical properties of metal under static load. In fact, many machine parts work under cyclic load, under which fatigue will occur.

Turrialba.High temperature diffusion heat treatment of ingot can improve the composition heterogeneity of ingot and improve the transverse performance of square tube.

When processing the square tube, some processes need to heat the seamless square tube. The heating operation in the processing of the seamless square tube plays a very key role in the quality of the finished seamless square tube.

Therefore,Turrialba40 galvanized steel square pipe, Q345A is usually not preheated. However, when the plate is very thick, it should be preheated because it cools quickly. Once 20# steel was cracked by J422 welding. If the plate thickness is more than 70mm, there is a great risk of not preheating.