Quality Assurance

Selected Raw Materials (Core Guarantee)

Copper Tubes: Adopt national standard red copper and inner-grooved copper tubes (φ7~φ15.88mm), featuring high purity, excellent thermal conductivity and corrosion resistance.

Fins: High-quality aluminum foil/galvanized sheet, treated with degreasing, drying and anti-corrosion processes.

Structural Parts: Stainless steel/high-strength galvanized sheet; all core materials pass environmental protection tests.

Supplier Access: Strict evaluation + batch sampling inspection; unqualified materials are rejected.

 Advanced Equipment and Technology

CNC Production Lines: 19 fin punching machines, CNC tube expanding machines, laser cutting machines, automatic bending machines, 6 U-shaped pipe bending machines, and large-scale drying and degreasing furnaces.

Key Technologies

Fins: Corrugated/flanging & burring processes, ensuring high heat exchange efficiency and stable structure.

Tube Expansion: CNC tube expansion, realizing tight combination between copper tubes and fins without gaps or loosening.

Welding: Automatic welding, featuring low leakage rate and stable strength.

Surface: Anti-corrosion coating + drying and curing, ensuring weather resistance and rust prevention.

Full-Process Inspection (Mandatory Before Delivery)

Incoming Quality Control (IQC): Material, size, mechanical properties and environmental protection tests.

In-Process Quality Control (IPQC): Fin size, tube expansion force, welding tightness and appearance inspection.

Final Quality Control (FQC)

Pressure Test: Water/air pressure test to prevent leakage.

Air Tightness Test: Helium test/bubble method, meeting zero leakage standard.

Dimensional Accuracy: Full-size sampling inspection with coordinate measuring machine/caliper.

Performance Test: Heat exchange efficiency, pressure drop, air volume and temperature resistance tests.

Salt Spray Test: Verification of anti-corrosion service life.