Quality Control & Certificates
Rigorous Inspection Standards, Complete Material Traceability, and Global Compliance from Wuxi, China.
Rigorous Multi-Stage Quality Checks
Our detailed inspections at every production phase guarantee flawless materials and unmatched durability, providing clients with consistent excellence.
Advanced Testing Capabilities
Utilizing state-of-the-art equipment, we conduct comprehensive tests to certify strength, composition, and compliance with international standards.
Industry-Leading Certifications
Certified by global authorities, our products meet and exceed industry benchmarks, assuring reliability and customer confidence worldwide.
Our Quality Commitment
Uncompromised Standards in Every Shipment
At Qiaodi Steel, quality is the foundation of our business. Operating from Wuxi—China’s primary stainless steel trading and processing center—we adhere strictly to international standards, including ASTM, EN, DIN, and JIS.
Whether supplying prime stainless steel raw materials, standard pipe fittings, or high-precision custom fabrication parts, every order undergoes multi-stage quality control to ensure total compliance with your technical specifications and drawings.
3. Our 4-Step Quality Control Process
- 01 / Incoming Raw Material Inspection (IQC)
- Chemical composition verification and spectral analysis before processing.
- Visual inspection for surface defects, dimension accuracy, and wall thickness.
- Direct raw material sourcing from accredited top-tier mills (TISCO, BAOSTEEL, ZPSS).
- 02 / In-Process Quality Control (IPQC)
- Real-time dimensional checks during laser cutting, CNC machining, bending, and welding.
- Strict tolerance control adhering to client drawings (STP, DWG, PDF).
- 03 / Pre-Shipment Final Inspection (FQC)
- 100% visual and surface finish checks.
- Thread and assembly verification for pipe fittings and custom OEM parts.
- Non-destructive testing (NDT) and pressure testing when required.
- 04 / Packaging & Logistics Protection (OQC)
- Anti-rust protection and protective wrapping for high-polish finishes.
- Heavy-duty seaworthy wooden crate packaging and container loading supervision.
Testing & Inspection Capabilities
- Chemical Analysis: Optical Emission Spectrometer (OES), Positive Material Identification (PMI) testing.
- Mechanical Testing: Tensile strength, yield strength, elongation, and hardness testing (HB/HV/HRC).
- Dimensional Inspection: CMM (Coordinate Measuring Machine), optical comparators, digital micrometers, and thread gauges.
- Non-Destructive Testing (NDT): Ultrasonic Testing (UT), Liquid Penetrant Inspection (PT), Hydrostatic Pressure Testing.
Certificates & Mill Test Reports
Full Documentation & Material Traceability
To ensure 100% material transparency and compliance, we provide full quality documentation with every shipment:
Compliance Documents: Certificate of Origin (CO, Form E, Form F), RoHS/REACH compliance upon request.
Mill Test Certificate (MTC): Fully compliant with EN 10204 3.1 / 3.2 standards detailing chemical and mechanical properties.
Quality Management System: Built in accordance with ISO 9001:2015 quality standards.
Third-Party Inspection: Full support for client-appointed third-party inspections (SGS, TÜV, Bureau Veritas, Intertek).
Experience Unmatched Quality Control at Qiaodi Steel
Discover how our rigorous quality assurance and certified processes ensure precision and reliability in every stainless steel product we deliver worldwide.