DC01/DC03/DC04/DC05/DC06 galvanized pipes (cold-rolled galvanized steel pipes compliant with EN 10130, with progressively enhanced formability) are widely used in machinery manufacturing—DC01 for simple fluid transport pipes (e.g., equipment cooling tubes), DC03/DC04 for moderately bent parts like hydraulic auxiliary pipes, DC05/DC06 for complex-shaped tubes in precision machinery; applied in home appliance sector for internal water/air circulation pipes of refrigerators and air conditioners, with higher grades for curved components; used in furniture production for adjustable shelf pillars and metal cabinet support tubes, leveraging corrosion resistance and formability; adopted in light industry for small-scale compressed air pipes and daily chemical equipment liquid transport lines, with grade selection based on shaping complexity; and applied in electronic equipment for chassis support tubes and internal wiring protection pipes, tailored to specific forming and surface quality requirements.