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Help Center304 Stainless Steel Spiral Punched Tube 1/2 Inch OD 0.049 Inch Wall Thickness for Filtration
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As a trusted manufacturer since 1998, Anping County Boli Hardware Wiremesh Products Factory specializes in producing high-quality metal filtration components. Our 304 Stainless Steel Spiral Punched Tube with 1/2 inch OD and 0.049 inch wall thickness is engineered to deliver reliable performance in demanding filtration applications. Combining precision punching technology with durable stainless steel construction, this tube offers excellent corrosion resistance, mechanical strength, and consistent flow characteristics.
Every spiral punched tube is manufactured using advanced CNC punching machines to ensure uniform hole patterns and tight tolerances. The 304 grade stainless steel provides excellent resistance to oxidation, chemicals, and high temperatures, making it suitable for water treatment, oil & gas, chemical processing, food & beverage, and pharmaceutical filtration systems.
Key Features & Benefits
- Material: 304 Stainless Steel – excellent corrosion resistance, food-grade quality, and long service life.
- Spiral Punched Design: Uniform hole distribution ensures consistent filtration efficiency and minimizes pressure drop.
- Precision Dimensions: Outer diameter 1/2 inch (12.7 mm) with wall thickness 0.049 inch (1.24 mm) for high burst strength and structural integrity.
- Customizable Length: Available in standard lengths of 1m, 2m, 3m, or custom lengths up to 6 meters to fit your equipment.
- Multiple End Finishes: Plain ends, threaded ends (NPT/BSP), or flanged connections available upon request.
- Easy Cleaning: Smooth internal surface and open structure allow backwashing and chemical cleaning without clogging.
- Wide Temperature Range: Suitable for operating temperatures from -196°C to 800°C in oxidizing environments.
Technical Specifications
| Outer Diameter | 1/2 inch (12.7 mm) |
| Wall Thickness | 0.049 inch (1.24 mm) |
| Material Grade | 304 Stainless Steel (UNS S30400) |
| Hole Diameter | 0.5 mm – 3.0 mm (customizable) |
| Open Area Ratio | 15% – 40% (depending on hole size and pitch) |
| Standard Length | 1 m, 2 m, 3 m (custom lengths available) |
| Maximum Working Pressure | Up to 150 bar (depending on length and end connections) |
| Surface Finish | Pickled & Passivated, Annealed, or Bright Annealed |
Typical Applications
- Water and wastewater filtration systems
- Oil and gas industry – sand control, desanding, and well screens
- Chemical processing – catalyst recovery, liquid-solid separation
- Food and beverage – juice, beer, wine filtration
- Pharmaceutical – sterile filtration, particle removal
- Brewing and distilling – mash filtration, wort separation
- Pollution control – dust collection, air filtration
Our spiral punched tubes are designed to replace perforated pipe, slotted screen, and wire-wrapped screens in many filtration applications. The spiral pattern ensures uniform flow distribution and reduces the risk of channeling. Compared to conventional punched tubes, the spiral design offers higher structural strength and better resistance to collapse under external pressure.
With over 25 years of manufacturing experience, we have supplied spiral punched tubes to customers in North America, South America, Europe, Southeast Asia, Africa, and Oceania. Our annual export value exceeds US$5 million, demonstrating our commitment to quality and global customer satisfaction. We ship from major Chinese ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring timely delivery worldwide.
We understand that every filtration system has unique requirements. That's why we offer flexible customization options: you can specify hole diameter, pitch, pattern, length, end connections, and surface treatment. Our engineering team is ready to assist with custom designs to meet your exact specifications. Contact us today for a quotation or technical consultation. We look forward to becoming your reliable partner for high-quality stainless steel filtration tubes.
Frequently Asked Questions
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Q: Is the tube made of genuine 304 stainless steel?
A: Yes, all our spiral punched tubes are manufactured from certified 304 stainless steel (UNS S30400) with full material traceability. We can provide mill certificates upon request. -
Q: What is the tolerance on outer diameter and wall thickness?
A: OD tolerance is ±0.005 inch, and wall thickness tolerance is ±10% of the nominal value. Tighter tolerances are available for special orders. -
Q: Can I get a custom length instead of standard 1m/2m/3m?
A: Absolutely. We can produce any length from 0.5m up to 6m per piece. For longer lengths, we can also provide welded joints or coupling connections. -
Q: What hole sizes are available for the spiral punching?
A: Standard hole diameters range from 0.5 mm to 3.0 mm. Custom hole sizes and shapes (round, slotted, hexagonal) are also available based on your requirements. -
Q: Is the tube suitable for high-temperature applications?
A: Yes, 304 stainless steel can withstand temperatures up to 800°C in continuous service under oxidizing conditions. For higher temperatures, we recommend 316L or 310S grades. -
Q: What surface treatment do you offer?
A: Standard finish is pickled and passivated to remove surface impurities and enhance corrosion resistance. Annealed, bright annealed, and electropolished finishes are available on request. -
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes, MOQ is 100 meters (or 50 pieces). For custom dimensions, MOQ may vary – please contact our sales team for details. -
Q: How do you pack the tubes for export?
A: Tubes are packed in bundles with plastic caps on ends, wrapped in waterproof paper, and secured with steel strapping. For sea freight, we use wooden crates or pallets to ensure safe transportation.
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