What are the different types of steel pipe in terms of grade, manufacturing process and applications?
On terms of manufacturing process, it can be divided into three categories;
Here, sheets are welded together to form the final pipes. This is also a cheap and easy methods fr certain sizes and grades. Hugely used in pipeline industry.
In seamless, the pipe in not joined or pasted, The complete pipe is formed into it's final shape. The processes used are 'extrusion' where, under pressure, a semi solid billet is pushed through a die with mandrel. Apart from this, rolling is widely used to form pipes of large diameter. There are many different sub processes which are specific to grades and diamter of the wall of the pipe.
3、 Cold forming
This is similar to seamless but it is done at room temperature and also results in work hardening of the material. This is done either through deep drawing or through pilgering.