At Xingtai Guanghua Rubber Products Co., Ltd. , strict quality control is the foundation of our OEM & custom rubber parts manufacturing , backed by ISO 9001:2015 and IATF 16949:2016 certified quality management systems.

We implement a comprehensive quality management system covering incoming material inspection , rubber compound verification , in-process molding control , and final product testing to ensure every rubber component meets OEM performance standards and durability requirements.

Our rubber quality control system helps customers achieve:

• Stable and consistent rubber part dimensions with tolerances ±0.05mm to ±0.15mm
• Reliable sealing and mechanical performance verified through testing
• Reduced defect rate in mass production through statistical process control (SPC)
• Traceable quality records and PPAP documentation for OEM projects
• 100% batch inspection for critical automotive safety components

Comprehensive Quality Testing Standards

Our quality inspection procedures include dimensional measurement using CMM equipment and precision gauges , Shore A/D hardness testing , tensile strength and elongation testing , compression set analysis (70 hours at elevated temperature) , oil/fluid immersion resistance testing , and visual defect inspection for surface quality verification.

We perform specific automotive rubber tests including heat aging resistance (ASTM D573) , low-temperature flexibility (ASTM D1329) , ozone resistance (ASTM D1149) , tear strength (ASTM D624) , and dynamic fatigue testing to ensure components meet demanding automotive operating conditions from -40°C to +200°C.

Each batch of rubber parts is inspected according to defined AQL sampling standards and customer-specific quality requirements, with complete documentation including material certificates , inspection reports , measurement data , and test results , ensuring long-term supply stability and full traceability for OEM and aftermarket customers worldwide.