SirajganjGalvanized steel pipeIt turns out that the industry’s water is so deep

Therefore, 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.

Requirements for samples samples can be taken from metal pipes with qualified appearance. Generally, sawing is adopted.

Sirajganj.There are many ways of ignition,SirajganjThick wall galvanized square pipe factory,SirajganjCold rolled rectangular tube, such as arc, electric spark, flame, high-temperature furnace, electron beam, laser, high-temperature radiation, microwave, chemical furnace, etc.

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

.When the square tube is processed, it needs to be properly polished to ensure durability, smoothness and. There are kinds of polishing for general stainless steel profiles, including mechanical polishing, chemical polishing and electrochemical polishing.

Cold formed hollow section steel (American Standard) for cold pressed Q345B square tube (national standard) structure carbon steel cold-formed circular section and pressure welded Q345B square tube and seamless Q345B square tube (European standard) non alloy fine grain cold formed welded hollow structural profile (Japanese standard) angle steel Q345B square tube for general structure galvanized q355b square tube for low pressure fluid transmission Standard No.: gbt3091-2008. Representative materials: q235q235bq345b, etc. it is mainly used to transport water, air, oil and water or steam. It is a special product manufacturing enterprise integrating R & D, and service. It has long been a professional square tube, square tube, Standard No.: gbt3092-2008. The representative materials are the same as above. It is mainly used to transport low-pressure fluids such as water, gas, air and oil and add water or steam. The surface of square pipe shall be hot galvanized or cold galvanized.

Today, with the development of the world, 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.

Ferroalloy is an alloy composed of iron and silicon, manganese, chromium titanium and other elements. Ferroalloy is the raw material for steelmaking. It is used as deoxidizer and alloy element additive for steel in square tube steelmaking.

The advantages of real bending are small reverse, accurate forming, and as long as the roll shape is accurate, the R of inner corner forming is more accurate. The disadvantage of solid bending is that it has tensile thinning effect. The actual bending will produce tension at the bending point and the tensile effect will shorten the longitudinal length of the bending line; The metal at the real bend will become thinner due to stretching.

Sincere service.It must be noted that in the overall process of square tube coating process,SirajganjDN32 galvanized pipe outer diameter, the cost of surface treatment is still relatively high, so it is very important to select appropriate treatment. Only by selecting the right treatment can the coating quality of square pipe be well guaranteed.

The quality of the solid square tube after the square tube formwork removal and curing can be tested according to the requirements and the following ways: use a magnifying glass to observe whether there are non external force cracks on the structural surface of the solid seamless q355b square tube. When non external force cracks appear on the surface of q355b square pipe, the crack width on the structural surface of ordinary q355b square pipe shall not be greater than 0.20mm.

The quality of the solid square tube after the square tube formwork removal and curing can be tested according to the requirements and the following ways: use a magnifying glass to observe whether there are non external force cracks on the structural surface of the solid seamless q355b square tube. When non external force cracks appear on the surface of q355b square pipe, the crack width on the structural surface of ordinary q355b square pipe shall not be greater than 0.20mm.

How to reduce the amount of oxide scale is the key to the heating operation of seamless square tube. Especially when it's hot. Starting from the service life of tools and the surface quality of pipes, the requirements are more stringent. For example, hot furnaces are divided into heating furnace and reheating furnace according to their functions; The former is used to heat the blank from normal temperature to processing temperature; The latter is used to reheat the blank to the necessary processing temperature during processing.

Test method.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).

Precision inner diameter square tubes for hydraulic and pneumatic cylinders (gb8713-8) are cold drawn or cold-rolled precision square tubes with precision inner diameter for hydraulic and pneumatic cylinders.

Strength refers to the function that the square tube data is destroyed under static load (appropriate amount of plastic deformation or fracture) because the action form of load includes tension, compression, meandering shear and so on, because the strength is also divided into tensile strength, compressive strength, flexural strength, shear strength and so on. There is often a definite connection between various strengths. In normal use, tensile strength is often used as the fundamental strength gauge.

Sirajganj.The strength, plasticity and angle discussed later are the machine function indicators of metal under static load. In practice, many mechanical machines are under repeated load, and the whole opportunity is tired in this environment.

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%.

Be sure to select special for square pipe cutting.