To ensure consistent quality across large-scale supermarket shelf production, distributors should mandate a comprehensive quality control protocol based on industry-standard engineering specifications. At Xingye Rack, we employ a multi-layered verification system to maintain uniformity across every batch:
Material Certification: Every bulk order must be traceable to its raw material source. We utilize Q235B Cold-Rolled Steel, verified by batch-specific Mill Test Certificates that confirm tensile strength and chemical composition compliance before production begins.
Automated Production Standards: Quality consistency is best achieved by minimizing human error. We utilize automated robotic welding lines and CNC punching machines to ensure that every upright, base leg, and bracket is identical in dimensions and structural integrity.
Standardized Surface Treatment: To guarantee a uniform finish that resists corrosion and scratches, we use a 9-step pre-treatment process—including acid pickling and phosphating—followed by lead-free AkzoNobel powder coating. Uniformity is verified through standard thickness testing (micrometer testing) across multiple samples per batch.
Third-Party Inspection (PSI): For bulk international shipments, we encourage distributors to engage independent inspection agencies (such as TUV or SGS) to conduct a Pre-Shipment Inspection (PSI). This process includes:
Dimensional Checks: Ensuring all modular components meet tolerance requirements for boltless assembly.
Loading Tests: Random sample testing to confirm the unit supports the rated load (e.g., 200kg+ per layer) with a 1.5x safety factor.
Packaging Compliance: Verifying that all units are flat-packed in 5-layer corrugated cartons with edge protectors to prevent transit damage.2
