Seamless steel pipes are cut into sections from pipe blanks in steel mills, and then heated in a ring furnace - perforated - sized - straightened - cooled - cutter - packaged into qualified finished products. Generally, they cannot be put in the production workshop before being delivered to the user. With so much in stock, dealers need to place some ready stock. However, dealers generally do not have large indoor warehouses, and if they do, the cost is too high and uneconomical. Most of them are outdoor warehouses. Seamless steel pipes are inevitably exposed to wind and sun when placed outdoors.
The so-called floating rust, as the name suggests, is a layer of rust floating on the seamless steel pipe. It can be removed by wiping it with a towel or other things. Simply put, floating rust is considered rust-free and is a normal state. The rust of seamless steel pipes is caused by seamless steel pipes that have been exposed to the wind and sun outdoors for at least one year. There are large and small pockmarks on the rusted seamless steel pipes. This is also caused by the floating rust of seamless steel pipes. The single biggest difference between rusty.
