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Did you know that there are two kinds of seamless steel pipes?

Views: 0     Author: Site Editor     Publish Time: 2021-02-12      Origin: Site

The seamless steel pipe for structure adopts two structures: general structure and mechanical structure. However, as we all know, many people often confuse fluid seamless steel pipes with seamless steel pipe structures. In fact, these two pipelines are completely different. The following briefly introduces the basic knowledge of seamless steel pipe structure to understand its overall situation.


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1. The seamless steel tube structure has become a kind of seamless steel tube because of its different uses. This variety is a seamless tube of general structure and mechanical structure. Representative structural seamless steel pipes include carbon steel 20# and 45# steel, Q235, alloy steel Q345, 20CR, 40CR, 20CrMO, 30-35CrO, 42CrMo and so on.


2. The difference between seamless steel tube and seamless steel tube structure.


The main difference between the two steel pipes is that the fluid seamless steel pipes are tested by hydraulic, ultrasonic, eddy current, magnetic flux leakage and other methods. Therefore, when selecting pressure piping standards, seamless steel pipes are not suitable for structural purposes.


Precision seamless steel pipes are widely used. General-purpose seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, and have the largest output. They are mainly used as pipelines or structural parts for conveying fluids.


Thick-walled seamless steel pipes are divided into thick-walled pipes and thin-walled pipes according to different uses. Seamless steel pipes are mainly used as petroleum geological drilling pipes, petrochemical cracking pipes, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation. Among them, Pi = 3.14 and L = the length of structural steel pipe is 7.8.


Therefore, the weight of the structural seamless steel pipe is 0.25_3.14_L_7.8_ If the unit of measurement is meters, the calculated weight is kilograms.


4. Use of seamless steel pipes for structural use


This kind of steel pipe is widely used in chemical, petroleum, textile, medical, food, machinery and other industrial anti-corrosion pipelines and structures, as well as stainless steel parts made of hot-rolled, extruded, expanded and cold drawn, seamless steel pipes. Thick-walled seamless steel pipes are divided into thick-walled pipes and thin-walled pipes according to different uses. Seamless steel pipes are mainly used as petroleum geological drilling pipes, petrochemical cracking pipes, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation.


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