20 Years of Experience in Seamless Steel Tube Production

How to Produce High-quality Seamless Steel Tube

Views:236     Author:Site Editor     Publish Time: 2019-11-25      Origin:Site

The  seamless steel tube are generally applied in erecting structures as well as for maintenance purposes. The major areas where the steel tubes are used include the construction of signposts, railings, buildings and more. The steel tubes are measured by their thickness, outer and the inner dimensions as well as the length of the entire piece.


The most used materials in the manufacture of the seamless steel tubes are aluminum and steel. However, iron is also widely used for its tenacity in structures where the risk of rust is not relevant. They are available in many storage lengths, which generally range from 60 cm to 7 meters, although the sizes can be tailored for a given project.


During the production of the seamless steel tube, care must to taken to ensure that the various standard seamless steel tube sizes and dimensions are maintained. Maintaining the specific dimensions and the sizes of the square pipe ensures that the quality assurance and the demand of customers are met.


Here, we shall be looking at the techniques involved in the production of high-quality seamless steel tubes.


In the case of seamless tube manufacturing process, the extrusion or cold drawn technique can be used. One of the disadvantages of seamless pipes is that they usually have less capacity to support localized loads. This feature makes the seamless square tubes less suitable for the construction of large buildings. 


Let's take a look at an overview of the manufacture of a standard seamless steel tube


The raw material for rolling the seamless pipe is a round tube blank and the round tube embryo is cut into a blank having a length of about 1 m by a cutting machine and sent to a furnace for heating via a conveyor belt. The billet is fed into a furnace and heated to a temperature of approximately 1200 degrees Celsius. The fuel is hydrogen or acetylene.


Cold drawn seamless steel tube


Furnace temperature control is a key issue. After the round billet is released, it is subjected to a through-hole punching machine. The more common perforating machine is a conical roller punching machine. This perforating machine has high production efficiency, good product quality, large diameter of perforation and can wear a variety of steel types. After perforation, the round billet is successively rolled, rolled or extruded by three rolls. After extrusion, the tube should be sizing. The sizing machine is rotated at a high speed by a conical drill bit into a steel core to form a steel pipe.


The inner diameter of the steel pipe is determined by the outer diameter of the sizing machine drill bit. After the steel pipe has been sized, it enters the cooling tower and is cooled by water spray. After the steel pipe is cooled, it is straightened. After the steel pipe is straightened, it is sent to a metal flaw detector (or water pressure test) by a conveyor belt for internal flaw detection. If there are cracks inside the steel pipe, bubbles and other problems will be detected. After the quality inspection of the steel pipe, it must be carefully selected by hand. After the quality inspection of the steel pipe, the paint is sprayed with the number, specification, production batch number, etc. It is hoisted into the warehouse by a crane.


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