EN10139 DC04 Double Wall Steel Tube 4.76mm x 0.71mm Zinc Coated for Refrigeration and Automotive Applications

EN10139 DC04 double-wall steel tubing with dimensions 4.76mm outer diameter and 0.71mm wall thickness, featuring zinc coating for enhanced corrosion resistance. Manufactured using advanced Bundywelding technology for superior structural integrity.

Supplied with slightly oiled outside surface to improve oxidation resistance. Requires storage in dry conditions away from humidity and corrosive agents.

Steel strip copper-coated on both sides with ≥2µm layer. External welding seam area remains uncoated due to scarfing operation.

Outside surface coated with zinc layer ≥70g/m². Withstands >72 hours in salt spray fog test before showing red rust (UNI ISO 9227).

Double-wall steel tubing manufactured using Bundywelding process - rolling copper-coated steel strip through 720 degrees and resistance brazing the overlapped seam. Strict process controls ensure minimal internal weld bead and complete external flashing removal.

• Household refrigeration systems
• Automotive components
• Condenser applications
• Industrial refrigeration

Comprehensive laboratory testing equipment ensures consistent quality and performance. All tubes manufactured with fine accuracies from low carbon steel strips.

Professional packaging ensures product protection during transportation and storage. All tubes carefully packed to maintain quality and prevent damage.