Understanding of thick-walled steel pipes and precautions in use

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. It is 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, the biggest difference between thick-walled steel pipes and thin-walled steel pipes is the thickness of the pipe wall. Steel pipes with wall diameters greater than 0.02 are generally called thick-walled steel pipes. Maybe you'll like the dos and don'ts of using thick-walled steel pipe. Thick-walled steel pipes have a very wide range of uses. Because their pipe walls are thicker, they can withstand greater pressures. Generally, it can be used as a material for hollow parts to withstand pressure and be used on important pipelines. Specifically, it can be used as structural pipes, petroleum geological drilling pipes, petrochemical pipes, etc. When using thick-walled steel pipes, relevant regulations must be followed. Therefore, different specifications of pipes must be used for different purposes. This also provides an important prerequisite for the use of thick-walled steel pipes, especially when transporting more dangerous goods. When using flammable media, it is necessary to find steel pipes of appropriate specifications, to effectively prevent accidents. Thick-walled steel pipes have great uses. Depending on 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 supply projects, the petrochemical industry, the chemical industry, the electric power industry, agricultural irrigation, and urban construction. For liquid transportation: water supply and drainage. For gas transportation: coal gas, steam, liquefied petroleum gas. For structural purposes: piling pipes, bridges; pipes for docks, roads, building structures, etc.

The general wall thickness of domestic thick-walled steel pipes is more than 20 mm. There are no special requirements. The following is the manufacturing process of steel pipes. The raw material for thick-walled steel pipes is steel pipe blanks. The pipe blanks are cut by a cutting machine into billets with a length of about 1 meter and are sent to the furnace for heating through a conveyor belt. The steel billets are sent into the furnace for heating at a temperature of about 1,200 degrees Celsius. The fuel is hydrogen or acetylene, and the temperature control in the furnace is a key issue. After the round tube is released from the furnace, it must be pierced by a pressure-piercing machine. Generally, the piercing machine is a tapered roller piercing machine. This type of piercing machine has high production efficiency, good product, large perforation diameter expansion, and can penetrate a variety of steels. After perforation, the round tube billet is successively cross-rolled, continuously rolled, or extruded by three rollers. After extrusion, the tube must be removed for sizing. The sizing machine rotates into the billet at high speed through a conical drill bit to drill holes. A steel pipe is formed. Thick-walled steel pipes are divided into two types, one is a hot-rolled steel pipe and the other is a thermally expanded steel pipe.

Precautions when using thick-walled steel pipes:
There is some doubt about the wall thickness that can be called a thick-walled steel pipe. In fact, 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 considered a thick-walled steel pipe with a diameter of 10 mm. , but for a diameter of 219 mm, 10 mm is only a thin-walled steel pipe. In fact, the basic definition of thick-walled steel pipe lies in the name given to it by customers. Things to note are that when purchasing thick-walled steel pipes, customers must be clear about the material of their steel pipes and the single length of the steel pipes because this involves the number of machined parts and some unnecessary waste.
Then there is the detailed size of the inner and outer diameter of the steel pipe. This must be included in it because the processing volume of some parts must be reserved. As a kind of mechanically processed steel pipe, thick-walled steel pipes are also classified into many categories. Customers must clarify whether they need hot-rolled seamless steel pipes, seamed thick-walled steel pipes, as well as some cast steel thick-walled steel pipes and hot-forged thick steel pipes. Form, explanation that can be replaced, direct emphasis that cannot be replaced.

How to determine the important key to thick-walled steel pipes:
1. Pay attention to its thickness. The pipe diameter should be greater than 0.02 because only such a pipe can withstand great pressure and will not break even if it is pulled hard. Secondly, it depends on whether its surface is smooth. The surface of inferior thick-walled steel pipes often has scars, and some have small cracks. Its surface lacks luster. When you see such a steel pipe, you must know that it is not high-quality. steel pipe.
Second, you also need to measure the pipe diameter from different places. Check to see if different places are the same. The steel pipe should be approximately the same in all places, otherwise it is of inferior quality. When choosing, everyone should choose products from large manufacturers, which generally have strict packaging. The packaging is loose and often irregular.