Domestic understanding of thick-walled steel pipes:
Thick-walled steel pipes, steel pipes whose outer diameter to wall thickness ratio is less than 20 are called thick-walled steel pipes. Mainly used as petroleum geological drilling pipes, cracking pipes for the petrochemical industry, boiler pipes, bearing pipes, and high-precision structural pipes for automobiles, tractors, etc. First of all, there is a big difference between thick-walled steel pipes and thin-walled steel pipes in terms of wall thickness. If the wall diameter of the steel pipe is greater than 0.02, we generally call it a thick-walled steel pipe. Maybe you’ll like this note on using thick-walled steel pipe. Thick-walled steel pipes have a very wide range of applications, and because of their thicker walls, they can withstand greater pressure. Generally, it can be used as a material for hollow parts, used to withstand pressure, and used on important pipelines. Specifically, it can be used as structural pipes, petroleum geological drilling pipes, petrochemical pipes, etc. When thick-walled steel pipes are used, they must also follow relevant regulations. Therefore, pipes of different specifications must be used for different purposes. This also provides an important prerequisite for the use of thick-walled steel pipes, especially when transportation is more dangerous. When using flammable media, it is necessary to find steel pipes of appropriate specifications, to effectively prevent accidents. Thick-walled steel pipes have very large uses and can be widely used in various heavy industries according to their different models and specifications. Therefore, the development of thick-walled steel pipes is also worth looking forward to. Thick-walled steel pipes are mainly used in water supply engineering, the petrochemical industry, the chemical industry, the electric power industry, agricultural irrigation, and urban construction. Used for liquid transportation: water supply and drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structural purposes: as piling pipes, as bridges; pipes for wharves, roads, building structures, etc.
Domestic thick-walled steel pipes generally have a wall thickness of more than 20 mm, and there are no special requirements. The following is the manufacturing process of steel pipes.
The raw material of the thick-walled steel pipe is a steel pipe billet, which is cut by a cutting machine into a billet with a length of about 1 meter, and sent to the furnace for heating through a conveyor belt. The billet is sent into the furnace for heating, and the temperature is about 1200 degrees Celsius. The fuel is hydrogen or acetylene, and the temperature control in the furnace is a key issue. After the round tube billet is out of the furnace, it needs to be pierced by a pressure piercer. Generally, the piercer is a tapered roller piercer. This piercer has high production efficiency, good products, and a large amount of perforation diameter expansion. First, after piercing, the round tube billet is successively cross-rolled, continuously rolled, or extruded by three rolls. After extrusion, the tube must be taken off for sizing, and the sizing machine rotates into the billet through a tapered drill at high speed to punch holes. A steel pipe is formed. There are two types of thick-walled steel pipes, one is hot-rolled steel pipes and the other is thermally expanded steel pipes.
Matters needing attention in the use of thick-walled steel pipes:
How much wall thickness can be called thick-walled steel pipe? This is a bit doubtful. It depends on the ratio of the outer diameter of the steel pipe to the wall thickness of the steel pipe. For example, a steel pipe with a diameter of 50 mm, and 10 mm can be regarded as a thick-walled steel pipe. Yes, but for a diameter of 219mm, 10mm is just a thin-walled steel pipe. The basic definition of thick-walled steel pipes lies in what customers call him. Points to note mean that when purchasing thick-walled steel pipes, customers should specify the material of their steel pipes and the single length of the steel pipes, because this involves the number of mechanically processed parts and some unnecessary waste.
Then there is the detailed size of the inner and outer diameters of the steel pipe, which must be included in the calculation because the processing amount of some parts must be reserved. As a kind of mechanically processed steel pipe, thick-walled steel pipes have many classifications. Customers need to know whether they need hot-rolled seamless steel pipes, seamed thick-walled steel pipes, and some cast steel thick-walled steel pipes and hot-forged thick-walled steel pipes. Form, replaceable description, irreplaceable direct emphasis.
How to determine the important key of thick-walled steel pipe:
1. Pay attention to its thickness, the diameter of the pipe is greater than 0.02, because only this kind of pipe bears a large pressure, even if it is pulled hard, it will not break. Secondly, it depends on whether its surface is smooth. Inferior thick-walled steel pipes often have scars formed on the surface, and some have small cracks. steel pipes.
Second, you have to measure the pipe diameter from different places. See if the different places are the same, the steel pipe should be about the same in every place, otherwise, it is inferior. When you choose, you should choose big manufacturers, which generally have strict packaging, and those with loose packaging are often irregular.
Post time: Apr-20-2023