Understanding of thick-walled steel pipes and precautions in use

Knowledge of thick-walled steel pipes:

Thick-walled steel pipe, steel pipe with a ratio of the outer diameter of the steel pipe to the wall thickness is less than 20 is called a thick-walled steel pipe. Mainly used as petroleum geological drilling pipe, cracking pipe for the petrochemical industry, boiler pipe, bearing pipe, and high-precision structural pipe for automobiles, tractors, etc. First of all, there is a big difference between thick-walled steel pipe and thin-walled steel pipe in terms of the thickness of the pipe wall. The diameter of the steel pipe wall is greater than 0.02, we generally call it thick-walled steel pipe. Maybe you'll like the precautions for using thick-walled steel pipes. Thick-walled steel pipes have a very wide range of applications. Due to their thicker walls, they can withstand higher pressures. It can generally be used as a material for hollow parts, used to withstand pressure, and used on important pipelines. Specifically, it can be used as a structural pipe, petroleum geological drilling pipe, petrochemical pipe, and so on. The use of thick-walled steel pipes should also follow relevant laws and regulations. Therefore, pipes of different specifications should be used for different purposes, which also provides an important premise for the use of thick-walled steel pipes, especially when transporting is more dangerous. When flammable media are used, it is necessary to find steel pipes of suitable specifications, to effectively prevent accidents. Thick-walled steel pipes have very large uses. According to their different models and specifications, they can be widely used in various heavy industries. Therefore, the development of thick-walled steel pipes is also worth looking forward to. Thick-walled steel pipes are mainly used in water engineering, the petrochemical industry, the chemical industry, the electric power industry, agricultural irrigation, and urban construction. For liquid transportation: water supply, drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structure: for piling pipe, for bridge; for wharf, road, building structure, etc.

The following is the manufacturing process of the steel pipe. The raw material of the thick-walled steel pipe is the steel pipe billet, which is to be 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 fuel is hydrogen or acetylene, and the temperature control in the furnace is the key issue. After the round tube blank is released, it needs to be perforated by a pressure perforator. Generally, the perforator is a conical roller perforator. This type of perforator has high production efficiency, good products, and a large amount of perforation and diameter expansion. After the perforation, the round tube billet is successively rolled, continuously rolled, or extruded by three rollers. After extrusion, the tube is removed and sized. The sizing machine rotates into the billet at high speed through a conical drill bit for drilling. Steel pipes are formed. Thick-walled steel pipes are divided into two types, one is hot-rolled steel pipes and the other is hot-expanded steel pipes.

Matters needing attention in the use of thick-walled steel pipes:

What is the wall thickness before it can be called a thick-walled steel pipe? This is a bit of a doubt. 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 can be regarded as a thick-walled steel pipe with a diameter of 10 mm. Yes, but for a diameter of 219mm, 10mm is just a thin-walled steel tube. The basic definition of thick-walled steel pipe lies in the customer's name for him. Matters needing attention means that when purchasing thick-walled steel pipes, customers should clarify the material of their steel pipes and the length of a single steel pipe because it involves the number of machined parts and some waste. Then there is the detailed size of the inner and outer diameter of the steel pipe, which is to be counted in because the processing capacity of some parts needs to be reserved. As a kind of machined steel pipe, thick-walled steel pipes are classified into many categories. Customers need to clarify whether they need hot-rolled seamless steel pipes or seamed thick-walled steel pipes, as well as the manufacture of some cast steel thick-walled steel pipes and hot-forged thick-walled steel pipes. Form, alternative 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 the pressure it bears is large, even if it is pulled with force, it will not break. Secondly, it depends on whether its surface is smooth. The surface of inferior thick-walled steel pipes often has scars formed, and some have small cracks. of steel pipes.

Second, you have to measure the diameter of the pipe from different places. See if it is the same in different places, the steel pipe should be about the same everywhere, otherwise, it is inferior. When you choose, you should choose a large manufacturer. Generally, they have strict packaging, and the packaging is loose and often irregular.