Quality Control
Liaoyang Petrochemical Company implements comprehensive, end-to-end quality management, utilizing a "3+1" quality supervision system and a closed-loop control mechanism that spans the entire process—from raw material intake and in-process monitoring to the dispatch of finished products. The company adheres to internal control standards that exceed national and industry benchmarks and employs multi-level monitoring of process parameters. Consequently, the pass rate for both outgoing shipments and random inspections consistently remains at 100%; by rigorously mitigating quality risks, the company ensures the stable and reliable quality of products such as PETG copolyester and refined adipic acid.
Three-Stage Quality System
Incoming Inspection
Every raw material batch tested against specifications before entering production. Certificate of Analysis verified for all suppliers.
In-Process Monitoring
Real-time process parameter monitoring with DCS systems. Automated sampling and testing at critical control points throughout production.
Final Release
Comprehensive end-product testing against international standards. Batch release only after all specifications are confirmed and documented.
Testing Methods & Standards
Chromatographic Analysis
HPLC and GC-MS analysis for purity, impurity profiling, and molecular identification per USP and EP standards.
Wet Chemistry
Classical titration, gravimetric, and colorimetric methods for assay determination and limit testing.
Physical Testing
Comprehensive physical property measurement including viscosity, density, refractive index, and particle size distribution.
Stability Studies
Long-term and accelerated stability testing per ICH guidelines ensuring product quality throughout shelf life.
Quality Without Compromise
Upholding a customer-centric commitment, Liaoyang Petrochemical leverages a collaborative mechanism integrating production, sales, and R&D to provide technical support and tailored product services for downstream applications. Through established, routine customer engagement channels, the company promptly addresses feedback, optimizes product grades and performance specifications to meet specific needs, and guarantees stable supply. By consistently delivering reliable products and technical services, Liaoyang Petrochemical fulfills its responsibilities to the market and its customers through long-term, stable quality assurance.
