The national standard for Polymer Sintered Microporous Membrane Elements, GB/T 47900-2026, has been officially released, with Zhejiang Dongou Filter Manufacturing Co., Ltd. serving as the lead drafting organization. Approved by the Standardization Administration of China, the standard fills a long-standing gap in the microfiltration sector, where no unified national-level product specifications previously existed.
National Standard Development
Drawing on 40+ years of microfiltration expertise, Dongou leveraged its core advantages in material formulation, sintering technology, and performance testing, collaborating with manufacturers and research institutes to formulate the standard. Initiated in 2024, it completed drafting, verification, public consultation and technical review before receiving official approval.
Core Standard Content
- Unified classification and model coding for tubular and flat-sheet sintered polymer microfiltration membrane elements;
- Comprehensive technical specifications covering dimensional tolerances, average pore size, porosity, pure water flux, tensile/impact strength, corrosion resistance, and other key parameters, alongside standardized test methods;
- Tiered performance thresholds for various membrane materials, balancing practical industrial use and forward-looking technical guidance.
This unified system addresses long-standing industry challenges such as inconsistent product metrics, divergent testing practices, and lack of fair benchmarking.
Industry-wide Benefits
Widely deployed in hydrometallurgy, battery materials, titanium dioxide processing, industrial wastewater treatment, pharmaceuticals, and chemical production, polymer sintered membrane elements have seen sustained demand growth in China. The absence of a unified national standard had previously led to performance variability among suppliers, constraining industry standardization. The newly released standard is expected to facilitate product quality upgrades and enhance the sector’s overall competitiveness.
About Dongou
A national high-tech enterprise and state-level “Little Giant” – a designation for specialized and innovative industry leaders, Dongou provides precision filtration solutions – from R&D and application to equipment manufacturing – for the chemical, pharmaceutical, non-ferrous metals, wastewater, and battery industries.
- Standard credentials: Lead drafter of 2 national standards and 4 group standards;
- Intellectual property: 3 PCT patents, 26 invention patents, 24 utility model patents; annual R&D spending exceeds 4% of revenue;
- Honors: Zhejiang Provincial Hidden Champion; 2025 Second-Class Science & Technology Progress Award from China Membrane Industry Association; its precision filtration & concentration system recognized as National First Major Technical Equipment.
