What is the difference between ordinary cold drawn and finish rolled seamless steel pipe

The difference between ordinary cold drawn seamless steel pipe and finish rolled seamless steel pipe is as follows:
1. The common seamless steel pipe is mainly characterized by no welding joint, which can bear large pressure. Products can be very rough as cast or cold drawn parts, suitable for machining, fluid pipe.  

2. The finish rolled seamless steel pipe is a product that appears in recent years. The main reason is that there are strict tolerances and roughness on the dimensions of inner hole and outer wall, and the appearance is bright. But the only disadvantage is that it can not be bent. The solution is to anneal at last, but it will not glow after anneal, but the wall thickness tolerance can also be guaranteed.