The circular steel tube is a hollow concentric round steel pipe
with both ends open, and its length is relatively larger than its circumference. It can be used in pipes, thermal equipment, machinery industry, petroleum geology drilling, containers, chemical industry and special applications.
Classification of round steel tubes
According to the production method, it can be divided into seamless circular steel pipe and welded circular steel pipe.
Manufacturing technology of seamless circular steel pipe
Tube billet inspection - peeling - Test - heating - perforation - Pickling - grinding - lubricating air drying - welding head cold drawing solution treatment acid washing - acid washing passivation
Manufacturing process of welded circular steel pipe
Peel test shear length qualitative welding smooth length check