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Help CenterStainless Steel Helically Perforated Tube, 304L, 3mm Hole, 60% Open Area, 3m Length for Chemical Processing
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Since 1998, Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer of precision-engineered filtration and separation components. Our Stainless Steel Helically Perforated Tube, 304L, 3mm Hole, 60% Open Area, 3m Length is designed specifically for demanding chemical processing environments. This product combines the corrosion resistance of 304L stainless steel with a unique helical perforation pattern that maximizes flow efficiency while maintaining structural integrity. With an annual export value of US$5-10 million and global distribution to over 15 markets, our perforated tubes are relied upon by leading chemical plants worldwide. The 3mm hole size and 60% open area provide an optimal balance between fluid throughput and particle retention, making it an ideal solution for catalyst support, filtration, and distribution applications.
Key Features & Technical Specifications
- Material of Construction: Premium 304L stainless steel – low carbon variant offers enhanced weldability and resistance to intergranular corrosion in chemically aggressive environments.
- Helical Perforation Pattern: The spiral arrangement of 3mm holes ensures uniform distribution of flow and pressure, reducing turbulence and dead zones.
- High Open Area (60%): Provides maximum free-flow area, minimizing pressure drop and energy consumption in chemical processing systems.
- Standard Length 3m: Convenient for installation in columns, reactors, and pipe systems. Custom lengths available upon request.
- Precision Manufacturing: CNC-controlled perforation ensures consistent hole size, spacing, and alignment across the entire tube length.
- Deburred and Smooth Edges: Each hole is carefully deburred to prevent particle entrapment and facilitate cleaning.
- Versatile Applications: Suitable for catalyst support grids, distributor plates, filter elements, sparger tubes, and fluidized bed internals.
| Parameter | Value |
|---|---|
| Material | Stainless Steel 304L (UNS S30403) |
| Hole Diameter | 3 mm ± 0.1 mm |
| Open Area | 60% ± 2% |
| Tube Outer Diameter | Customizable (standard: 50mm, 60mm, 80mm; other sizes available) |
| Wall Thickness | 1.5 mm – 3.0 mm (optional) |
| Length | 3 m (standard); up to 6 m available |
| Perforation Pattern | Helical (staggered rows) |
| Surface Finish | Mill finish, pickled, or passivated (optional) |
Advantages for Chemical Processing
- Enhanced Corrosion Resistance: 304L grade withstands nitric acid, organic acids, and many chloride-containing environments, extending service life in chemical reactors.
- Optimized Flow Distribution: The helical pattern ensures even liquid or gas distribution across the entire cross-section, preventing channeling and improving reaction efficiency.
- Low Maintenance: Smooth internal surfaces and deburred holes reduce fouling and simplify cleaning procedures, minimizing downtime.
- Mechanical Strength: Despite 60% open area, the tube retains excellent structural rigidity for use as a support element in packed columns.
- Customizable to Your Process: We can adjust hole diameter, open area, tube diameter, and length to match specific process requirements.
With over 25 years of manufacturing experience, Anping County Boli Hardware Wiremesh Products Factory guarantees consistent quality and rapid delivery. Our factory in Hengshui, Hebei, operates advanced CNC perforating machines that ensure each tube meets strict tolerances. We ship from Tianjin, Qingdao, Shanghai, and Foshan ports, serving North America, Europe, Southeast Asia, and beyond. More than 80% of our clients return for repeat orders due to the reliability and performance of our perforated tubes. Contact us today to discuss your specific chemical processing requirements – we provide free technical consultation and samples upon request.
Frequently Asked Questions
Q1: What is the difference between 304 and 304L stainless steel for this tube?
A: 304L has a lower carbon content (max 0.03%) which reduces the risk of carbide precipitation during welding, making it more suitable for chemical processing environments where corrosion resistance is critical.
Q2: Can I get a tube with a different open area percentage?
A: Yes, we can customize the open area from 30% to 70% by adjusting hole size, spacing, and pattern. Please contact us with your requirements.
Q3: Are these tubes suitable for high-temperature applications?
A: 304L stainless steel offers good oxidation resistance up to 870°C (1600°F) in intermittent service and 925°C (1700°F) in continuous service. For higher temperatures, we recommend 310S or other alloys.
Q4: What is the typical lead time for a standard 3m tube?
A: For standard sizes (OD 50-80mm, wall thickness 1.5-2.0mm), lead time is approximately 15-20 working days. Custom orders may require 25-30 days.
Q5: Do you provide a certificate of material (mill test report)?
A: Yes, we can provide a mill test certificate for 304L material upon request. This ensures traceability and compliance with industry standards.
Q6: Can the tube be welded or cut to shorter lengths?
A: Absolutely. The tube is designed to be easily welded, cut, or machined. We can also supply pre-cut lengths to your specification.
Q7: What is the packaging for export?
A: Tubes are individually wrapped with protective film, then bundled with wooden crates or steel pallets to prevent damage during sea freight. Custom packaging is available.
Q8: Do you offer samples for testing?
A: Yes, we provide small samples (e.g., 300mm length) at nominal cost. Shipping is charged separately. Contact our sales team to arrange.
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