Thick-walled steel pipe is a commonly used type of seamless steel pipe and is widely used in various fields. In order to let everyone know more about thick-walled steel pipes, we will introduce to you the characteristics of thick-walled steel pipes. And the role of thick-walled steel pipes, let’s take a look!
Characteristics of thick-walled steel pipes
First, the thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the processing cost will be A substantial increase;
Secondly, the process of the product determines its limited performance. Generally, thick-walled steel pipes have low precision: uneven wall thickness, low internal and external brightness, and fixed The cost of the ruler is high, and there are pits and black spots on the inner and outer surfaces that are difficult to remove;
Thirdly, its detection and shaping must be processed offline. Therefore, it reflects its superiority in terms of high pressure, high strength, and mechanical structural materials.
Classification of thick-walled steel pipes
Small-diameter thick-walled seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, etc. according to different production methods. Rolled seamless pipes are generally produced on an automatic pipe rolling unit. The solid tube blanks are inspected and surface defects are removed and cut into required lengths. They are centered on the perforated end of the tube blanks and then sent to the heating furnace for heating and piercing on the piercing machine. At the same time, the piercing is performed Continuously rotating and advancing, under the action of the roller and the head, a cavity is gradually formed inside the tube blank, called a gross tube, and then sent to the automatic tube rolling machine for continued rolling. Finally, the wall thickness is evened by the leveling machine, and the size is determined by the sizing machine to meet the specifications. According to the requirements, the use of continuous pipe rolling units to produce hot-rolled seamless steel pipes is a more advanced method.
Materials of thick-walled steel pipes
Commonly used domestic materials for thick-walled straight seam steel pipes are: 10# 20mn 42crmo 36CrMo 40Cr 20Cr 15CrMo 12Cr1Mov Q235A, Q235B, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, 16Mn, 20#, 45#, Q345, L245, L290, X42, X46, X70, X80.
When welding thick-walled steel pipes, first clean the oil, paint, water, rust, etc. from the welding joint, and then make bevels according to the wall thickness. For thicker ones, make the bevel larger, and for thinner ones, make the bevel smaller (angle grinding) machine), and then there is the gap between the products, which is generally 1-1.5 times the diameter of the welding rod or wire. If the groove is accidentally opened wider, it can be left smaller.
The role of thick-walled steel pipes
Thick-walled seamless pipes definitely have more advantages than ordinary pipes. First, because the seamless structure pipe wall and body are very smooth, and secondly Second, because it is made of non-raw steel, stainless steel is resistant to high temperatures and severe cold, and will not deform or twist. Thick-walled seamless pipes play a great role in the process of modern industrialization. Oil pipelines must use this kind of thick-walled seamless pipe as a transportation tool. Because of its high quality, oil leakage accidents will not occur. Thick-walled seamless pipes are a necessary material tool for many oil companies.
Stainless steel industrial pipe manufacturers say that this kind of steel pipe is mainly used in some tools. It is better to say that the tap water we use will use this kind of steel pipe during construction. For example, in the northern region, the terrain is flat and the machinery is developed. , these steel pipes will be used when watering fields. For example, these steel pipes will be used in the process of building cities. For example, when building roads and docks, these steel pipes will be used.