Why Can We Always Ensure Excellent Quality

Quality Control

Total Quality Control: Mastering the Steel, Perfecting the Part

While many suppliers merely assemble, we manufacture. As an integrated supplier of appliance-grade steel coils​ and finished enamel components, we control the quality at the genetic level. This is the difference between "good enough" and "industry-leading."

1. Certified Material Sources:

Long-term partnerships with leading steel mills, supplying CRC, HRC, GI, GL, PPGI/PPGL, and other appliance-grade steels with original Mill Test Certificates (MTC).

2. Surface Quality Assurance:

Strict surface grading to prevent scratches, dents, rust, and other defects—ideal for visible appliance panels.

3. Precision Dimensional Control:

Thickness, width, and flatness maintained within tight tolerances for stable stamping and bending.

4. Mechanical Performance Testing:

Yield strength, tensile strength, and elongation tested per order; third-party inspection (SGS, BV) available upon request.

5. Stamping & Forming​

Strict mold and press parameter control to prevent cracks, wrinkles, and dimensional deviation.

6. Welding Quality (where applicable)​

Welded areas are inspected for appearance and strength to avoid incomplete fusion, undercut, or distortion.

7. Surface Pretreatment​

Standardized degreasing, pickling, and rinsing to ensure surface cleanliness and prevent pinholes or bubbles after enameling.

8. Enameling Process Control​

Slip density, coating thickness, firing temperature, and time are continuously monitored to guarantee uniform glaze, consistent color, and defect-free surfaces.

9. Final Product Testing​

Visual inspection (gloss, color difference), adhesion tests, thermal shock resistance, and corrosion resistance tests according to appliance industry requirements.