Quality
You can also request third-party inspection from SGS, BV, and TÜV, including in-process supervision and pre-shipment verification, to meet your project and compliance requirements. All systems are built around a zero-leakage performance standard for critical gas, heating, and industrial flow control applications.
Quality at HAOGUANG is defined through measurable valve performance. Every valve is tested, recorded, and verified under international standards, including API 6D, API 600, API 594, API 609, and ISO 5208.
-
18-Month Warranty Coverage
-
5000+ High-Cycle Durability Testing
-
100% Traceable Manufacturing Records System
Valve Laboratory Testing
Every Valve Under Strict Process Quality Control
Before production begins, forgings pass complete material verification to confirm mechanical and chemical compliance.
Gate and globe valve sealing surfaces are machined to 0.01 mm flatness, while our team verifies hardness matching before assembly.
Every check valve undergoes dynamic closure evaluation to keep seating deviation within 5% under operating conditions.
During assembly, engineers monitor seal compression within ±0.2 mm to maintain stable torque and sealing consistency.
Throughout manufacturing, fire-safe sealing structures are validated to support API 607 performance requirements.
Audit Ready
Digital Traceability System for Valve Manufacturing Transparency
Our valve traceability system links every product to its heat number, inspection reports, pressure testing records, and shipment documentation.
With 100% traceable manufacturing data available through a unique serial number, you gain greater control over project quality management and long-term asset reliability. Contact us for traceable valve solutions.