Views: 222 Author: Robert Publish Time: 2025-03-11 Origin: Site
Content Menu
● How Porous Stainless Steel Tubes Work
● Advantages of Porous Stainless Steel Tubes in Liquid Filtration
>> Chemical and Corrosion Resistance
>> Reusability and Low Maintenance
● Applications in Liquid Filtration
>> Oil and Gas
● Maintenance and Optimization
>> 1. What Filtration Accuracy Can Porous Stainless Steel Tubes Achieve?
>> 2. How Are These Tubes Cleaned Without Damaging Them?
>> 3. Can Porous Stainless Steel Tubes Be Customized for Unique Systems?
>> 4. Are They Cost-Effective Compared to Disposable Filters?
>> 5. What Temperature Limits Do These Tubes Have?
Liquid filtration remains a critical process across industries ranging from pharmaceuticals to wastewater treatment. Among advanced filtration technologies, porous stainless steel tubes have emerged as a durable, high-performance solution. These tubes combine stainless steel's inherent strength with controlled porosity to achieve precise filtration while withstanding extreme operational conditions. Below, we explore their design, applications, and advantages in liquid filtration systems.
Porous stainless steel tubes are manufactured through powder metallurgy, where 316L stainless steel particles are sintered at high temperatures to form interconnected pores. This process creates a rigid, three-dimensional structure with pore sizes ranging from 0.22 to 100 microns, allowing customization for specific filtration needs.
During liquid filtration:
1. Contaminated liquid enters the tube's interior.
2. Particles larger than the pore size are trapped within the porous matrix (*deep filtration*).
3. Clean liquid permeates through the tube walls.
4. Accumulated solids are removed via backwashing, ultrasonic cleaning, or chemical treatments.
The tubes' uniform pore distribution ensures consistent flow rates and prevents clogging, even with viscous fluids like polymer melts or slurries.
Unlike polymer or ceramic filters, porous stainless steel tubes withstand pressures up to 3 MPa and temperatures exceeding 800°C without deformation. This makes them ideal for high-pressure industrial systems and steam sterilization processes[4][8].
316L stainless steel's chromium-nickel composition provides excellent resistance to acids, alkalis, and organic solvents. This enables their use in:
- Pharmaceutical solvent recovery
- Chemical processing of aggressive media
- Offshore oil and gas filtration[2][7].
The tubes' rigid structure allows repeated cleaning without damage. Backflushing restores 95–98% of initial flow rates, reducing replacement costs[5][6].
Manufacturers like HENGKO and Filson offer tubes in:
- Diameters: 8–200 mm
- Lengths: Up to 1,200 mm
- Pore sizes: Submicron to 70 microns
- End fittings: NPT, BSP, flanges, or welded joints[4][9].
- Wine clarification: Removes yeast and sediment with 5–25 micron pores.
- Edible oil purification: Filters particulates during cold pressing.
- Carbonated beverage systems: Acts as a diffuser for CO2 injection[2][7].
- API (Active Pharmaceutical Ingredient) filtration: Ensures sterility in drug solutions.
- Solvent recovery: Captures catalyst residues in reactors[4][8].
- Hydraulic fluid filtration: Removes wear particles in offshore rigs.
- Produced water treatment: Separates oil emulsions and sand[9].
In purified terephthalic acid (PTA) manufacturing, porous stainless steel tubes recover catalysts from mother liquor with 98% efficiency, reducing raw material costs[4].
1. Backwashing: Reverse fluid flow dislodges trapped particles.
2. Ultrasonic baths: Remove stubborn deposits in laboratory settings.
3. Chemical soak: Nitric acid or alkaline solutions dissolve organic residues[5][6].
- Inspect O-rings and gaskets for compatibility with operating temperatures.
- Avoid overtightening connections to prevent tube warping[1][7].
Porous stainless steel tubes offer unmatched durability, precision, and adaptability in liquid filtration. Their ability to operate under extreme conditions while maintaining filtration efficiency makes them indispensable in industries demanding reliability and cost-effectiveness. As filtration standards tighten, these tubes will play a pivotal role in achieving sustainable, high-purity processes.
They provide filtration from 0.22 to 100 microns, suitable for submicron particle removal in pharmaceuticals or coarse filtering in wastewater[4][8].
Backwashing with clean fluid or ultrasonic cleaning effectively restores flow rates. Acidic/alkaline cleansers are used for chemical residues[5][6].
Yes. Manufacturers offer custom diameters, lengths, pore sizes, and end-connection designs (e.g., flanges, threaded joints)[1][9].
Despite higher upfront costs, their 10+ year lifespan and reusability reduce long-term expenses[7][8].
Standard 316L tubes operate continuously at 816°C, with nickel-alloy variants exceeding 1,200°C[4][7].
[1] https://www.hengko.com/high-performance-porous-sintered-metal-stainless-steel-isostatic-filters-tubes-support-liquid-and-gas-applications-products/
[2] https://www.hengko.com/nanometer-microns-grade-brass-bronze-ss-316l-stainless-steel-powder-sintered-porous-filter-material-media-products/
[3] https://www.hengko.com/porous-metal-tubes/
[4] https://www.edgetechmat.com/product/porous-stainless-steel/
[5] https://www.youtube.com/watch?v=5Fnn51PBryM
[6] https://www.poral.fr/img/cms/pdfs/brochure-filtres-poral.pdf
[7] https://www.filsonfilters.com/porous-tube/
[8] https://www.sintered-mesh.com/sinteredmesh/powder-sintered-plate/porous-stainless-steel-product.html
[9] https://www.hengko.com/sintered-powder-25-micron-porous-metal-stainless-steel-316l-filter-tube-for-gas-liquid-solid-filtration-products/
[10] https://www.china-yitongfiltration.com/news/a-comprehensive-guide-to-sintered-porous-metal-filter-tubes.html
[11] https://hengkometer.en.made-in-china.com/product/oAOrixwdLUky/China-Industrial-Stainless-Steel-Sintered-Porous-Metal-Filter-Tube-for-Gas-or-Liquid-Filtration.html
[12] https://www.sinteredfilter.net/porous-stainless-steel-tube/
[13] https://www.youtube.com/watch?v=5Qav6idD_Ks
[14] https://www.hengko.com/high-performance-porous-sintered-metal-stainless-steel-isostatic-filters-tubes-support-liquid-and-gas-applications-2-products/
[15] https://aegismetal.en.made-in-china.com/product/vQSRiIEOJJrV/China-SS316L-316-304-Stainless-Steel-Powder-Sintered-Porous-Metal-Tube.html
[16] https://www.sinteredfilter.net/porous-stainless-steel/
[17] https://www.pall.com/content/dam/pall/chemicals-polymers/literature-library/non-gated/GDS110.pdf
