What is the difference between ordinary seamless steel pipe and precision steel pipe

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

2. Precision steel pipe is a product that appears in recent years. The main features are that there are strict tolerances and roughness in 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. However, after annealing, the precision steel pipe will not glow, but the wall thickness tolerance can also be guaranteed.