Precision Engineered, Certified Proven

Every Engine Component Stands Up to Rigorous Standards

At Hunan Longenyuan Auto Parts Co., Ltd., excellence is our core commitment. We don't just meet standards—we consistently exceed industry expectations. The following international certifications are our solemn guarantee of product quality, manufacturing systems, and professional capabilities.

Behind our certifications lies a rigorous, closed-loop quality assurance system:

1. Digital Traceability System:​ A unique identity code is generated for each critical component, enabling full lifecycle traceability from the raw material heat number to finished product shipment.

2. Full-Process Inspection Control:​ Strict implementation of four checkpoints: IQC (Incoming Quality Control), IPQC (In-Process Quality Control), FQC (Final Quality Control), and OQC (Outgoing Quality Control). 100% full inspection for critical dimensions.

3. Advanced Product Quality Planning (APQP) & Production Part Approval Process (PPAP):​ During new project development, we strictly follow the APQP process and ensure products fully meet all your requirements before mass production by submitting complete PPAP documentation packages.

Authorized Testing Partner: Guangdong KEYS Testing Technology Co., Ltd.

To ensure the reliability of our engine components under extreme operating conditions, we have established a long-term partnership with Guangdong KEYS Testing Technology (accredited CNAS Lab No. L12596). KEYS provides us with critical material mechanical performance tests, durability environmental simulations, and chemical compliance (RoHS) verifications, ensuring every batch meets international standards before delivery.