Boiler seamless pipes
have a relatively high status in steel pipes, and there are many major factors. The main usage has accounted for more than 90%, and it is applicable to all walks of life. my country's boiler seamless tube plants are widely produced. At present, the number of factories in my country is also increasing every year. This is determined by the nature and production conditions of boiler seamless tubes. Common production processes and processes are relatively complex.
How is the boiler seamless tube made?
are made of steel blocks or solid pipe blanks drilled to make parent pipes, which are then made by hot rolling, cold rolling or cold dial. Boiler seamless pipes occupy an important position in my country's steel pipe industry. The production process of boiler seamless tube is relatively rich, and it is generally processed and produced according to the corresponding steps.
The production process of seamless pipes can be divided into two types: cold drawing and hot joining. The production process of cold-rolled boiler seamless pipes is usually more complicated than hot joining. , if the surface does not respond to cracks, the pipe should be cut into a roughly 1-meter-long blank by a cutting machine. Then enter the annealing process. The annealing should be pickled with an acidic liquid. Pay attention to whether there will be a lot of foam on the surface during pickling. If a lot of foam is produced, it can be seen that the quality of the steel pipe does not meet this standard. From the appearance point of view, the cold-rolled boiler seamless pipe should be shorter than the hot-rolled boiler seamless pipe. The wall thickness of the cold-rolled boiler seamless pipe is usually smaller than that of the hot-rolled boiler seamless pipe, but the surface is thicker than that of the thick-walled boiler seamless pipe. Bright, the surface is not rough, and there are not many burrs on the caliber.
Boiler seamless tubes have a wide range of uses and a wide range of applications. Pay attention to the quality characteristics and make a reasonable choice when using them.
Why does scale appear on the boiler seamless tube?
The reason why the boiler seamless tube decreases with the increase of the moving speed is mainly the change of the smooth condition. After the object stops, the lubricating oil between the two smooth surfaces protrudes, similar to dry collision or dry collision, and completely converted to wet collision before the speed is added to the point, at this time, an oil film is formed between the two metal surfaces, which is isolated by oil molecules , at this time, the collision moment has a positive braking characteristic, which can prevent the object from vibrating at high speed. As the speed of motion increases, so does the collision moment. Because smooth oils are sticky. This is because, if the movement speed is increased to a certain number, the collision moment will no longer change with the speed. Cleaning method: Apply creeping oil (such as molybdenum disulfide lubricating oil) between relatively moving surfaces to ensure good smooth conditions. Thick-walled boiler seamless pipes have the ability to resist atmospheric oxidation, that is, the ability to not rust, and the ability to corrode in media containing acids, alkalis, and salts, that is, corrosion resistance. However, the size of corrosion resistance depends on the chemical composition of the steel itself, the mutual state, the conditions of use and the type of environmental media.