1. Differences in production processes
First of all, there are differences in the production processes between hot-rolled seamless steel pipes and seamless steel pipes. Hot-rolled seamless steel pipes are produced by hot rolling, that is, a series of processes such as perforation, rolling, and sizing of steel billets at high temperatures are performed to finally form steel pipes. Seamless steel pipes are a broader concept, which includes steel pipes produced by various processes such as hot rolling, cold rolling, and cold drawing.
2. Differences in product characteristics
Due to different production processes, hot-rolled seamless steel pipes and seamless steel pipes also differ in product characteristics. Hot-rolled seamless steel pipes undergo high-temperature rolling during the production process, so their internal structure is tighter and their mechanical properties are improved. At the same time, the hot rolling process makes the wall thickness of the steel pipe more uniform and improves its pressure bearing capacity. However, there may be black oxide scale on the surface of hot-rolled seamless steel pipes, which need to be rust-free before use.
In contrast, seamless steel pipes have more diverse product characteristics because they include multiple production processes. For example, seamless steel pipes produced by cold rolling or cold drawing processes have smoother surfaces and higher dimensional accuracy, which are suitable for occasions with high precision requirements. Hot-rolled seamless steel pipes are more suitable for general mechanical processing and structural engineering.
3. Differences in application fields
Finally, there are certain differences between hot-rolled seamless steel pipes and seamless steel pipes in terms of application fields. Since hot-rolled seamless steel pipes have good mechanical properties and pressure-bearing capacity, they are widely used in petroleum, chemical, electric power and other fields for conveying fluids.
