Steel Pipe and Tube Manufacturing Process
The technique used to manufacture steel pipes and tubes in the 19th Century is known as rolling mill. The techniques involved a number of long procedures. Sheets of rolled strips of steel were shaped into a cross-section in the shape of a circle. This was accomplished by using funnel rolls. The forge welding process was then put to use to perform lap welding.
Much to the joy of steel pipe manufacturers, the passage of time saw the emergence of more cost-efficient and effective ways to fabricate steel for use as pipes and tubes. The preferred technique of choice nowadays is the continuous tube mill. This method makes use of multitorch tungsten.
The Tube Mill Process
- Rolling and welding
The first step is to check the quality of the steel and ensure that their edges are trimmed before being fed into the tubes mill. These strips are then made to pass through several rollers to get the size required by steel pipe manufacturers in India. The steel slowly takes the shape of tubes in the tubes mill. Using the TIG welding process the edges of the steel are trimmed by a welding machine. The Tibo machine instantaneously removes weld beads on the inside as well as scraps.
- Cleaning and Heating
The steel pipes formed in the previous phase are then sized appropriately according to the need at hand. They are then cleaned so that they are free from dirt. In addition, the rolled pipes are treated with heat. This is done in order to remove formation and welding related stresses. This treatment with heat is applied without break on the rolling hearth furnace. After that, the steel pipes and tubes are straightened before being pickled in order to get rid of its surface of scales.
In particular cases, the mill may not directly furnish steel of the desired size. If this is the case the process of cold operation may be put into use. In this, the pipes or tubes are given a coasting of oxalic and soap solution which acts as a sort of lubricant serving to minimize friction which occurs. Die plugs are then used to draw the pipes or tubes over the bench.
The tubes or pipes are then drawn out and cleaned, treated with heat, pickled and straightened. They are then marked with automated ink jet marking machines. Markings are made about the grade, heat number, size of the steel pipes. Before being exported or used the steel will undergo a number of checks and tests to ensure its quality.
Utkarsh India Limited is a leading ERW pipe manufacturer in India and we hope that our blog post has been enlightening regarding the process followed in the manufacture of steel pipes and tubes. If you have a requirement for pipes particularly ERW and GI pipes we are a GI pipes manufacturer you simply cannot afford to miss out on.