GB/T 3639 High Precision Cold  Rolling or Cold Drawing Seamless  Steel Pipe

The steel pipes, sourced from renowned steel producers like 10, 20, 35, 45, and Q355B, go through meticulous processes involving acid pickling and fine-drawn cold rolling. The result is a steel pipe that boasts exceptional precision, characterized by its smooth surface with no oxide scale present, both internally and externally. These pipes are engineered to handle high-pressure fluid transmission without compromise.

Moreover, they can be easily manipulated cold-formed, allowing for tasks such as expanding, reducing, or flattening larger diameters. Primarily, they are employed in the manufacture of precision components for automobiles, such as oil lines, brake lines, airbag inflation tubes, and crash-bar components. They serve as specialized materials for both automotive systems and hydraulic equipment, emphasizing durability and functional sophistication.