Seamless steel pipe
The seamless steel pipe is cold-drawn, cold-rolled and other cold-formed steel, and the state of direct delivery without any heat treatment is called cold drawing or cold rolling. Compared with the hot-rolled (rolled) state, the steel in the cold-drawn (rolled) state has high dimensional accuracy, good surface quality, low surface roughness, and high mechanical properties, and is delivered in a cold-drawn (rolled) state. The surface is free of scale covering, and there is a large internal stress, which is highly susceptible to corrosion or rust. Therefore, the steel in the cold drawn (rolled) state has strict requirements for packaging, storage and transportation, and generally needs to be stored in the warehouse. And should pay attention to the temperature and humidity control in the warehouse.