structured packing serves as a critical component in chemical separation equipment, and China has established specific national standards to govern its production and application. These standards, identified by document numbers such as GB/T series, outline technical requirements, material specifications, and performance criteria to ensure reliable and efficient operation in industrial processes.
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Key National Standards for Structured Packing: Core Requirements and Technical Specifications
In China, the primary national standards for structured packing include GB/T 39238-2020, GB/T 39239-2020, and GB/T 39240-2020. GB/T 39238-2020 focuses on "Metal Hole-Plate Corrugated Packing for Chemical Equipment," specifying materials like 304 and 316L stainless steel, with structural parameters such as specific surface area (125-500 m²/m³) and porosity (≥95%). It also details performance tests, including height equivalent to a theoretical plate (HETP) and pressure drop measurements. GB/T 39239-2020 addresses "Non-Metallic Hole-Plate Corrugated Packing," using materials like polypropylene (PP) and polyvinyl chloride (PVC), suitable for corrosive environments in absorption towers. Meanwhile, GB/T 39240-2020 targets "Metal Wire Mesh Corrugated Packing," offering high separation efficiency for vacuum distillation and fine separation, with wire diameters as small as 0.15 mm. For example, a metal hole-plate packing complying with GB/T 39238-2020 can boost distillation column efficiency by 15-20% compared to unstandardized products, reducing energy consumption by 10-15%.
1. What are the main document numbers of national standards for structured packing in China?
- The key standards are GB/T 39238-2020, GB/T 39239-2020, and GB/T 39240-2020, each covering distinct packing types.
2. How do these standards ensure product quality?
- They specify material composition, structural parameters, and performance tests, ensuring consistency and reliability in industrial applications.
3. Which industries benefit most from adhering to these standards?
- Chemical, petrochemical, and pharmaceutical industries, as compliance guarantees optimal separation results and equipment longevity.
