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Help Center316L Stainless Steel Helically Perforated Tube 4 Inch OD 1.5mm Wall 8mm Pitch 35% Open Area
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As a leading manufacturer with over 25 years of experience, Anping County Boli Hardware Wiremesh Products Factory proudly presents our premium 316L Stainless Steel Helically Perforated Tube – a robust solution for demanding filtration, separation, and structural applications. This tube features a precise 4-inch outer diameter, 1.5mm wall thickness, 8mm pitch, and 35% open area, engineered for optimal flow performance and corrosion resistance. Our factory, established in 1998, ensures consistent quality through advanced manufacturing processes and strict quality control, making this product a trusted choice for global clients across North America, Europe, Asia, and beyond.
The 316L stainless steel material offers superior resistance to chlorides, acids, and harsh environments compared to standard 304 stainless steel, making it ideal for marine, chemical, and food processing applications. The helical (spiral) perforation pattern provides uniform distribution of openings, enhancing structural integrity while maintaining high open area. With an annual export value of US$5-10 million, we guarantee reliable supply and competitive pricing for both small and bulk orders.
Key Features & Technical Specifications
- Material: 316L stainless steel (low carbon) – excellent weldability and corrosion resistance
- Outer Diameter: 4 inches (101.6 mm) – standard size for easy integration with existing systems
- Wall Thickness: 1.5 mm – balances strength with weight reduction
- Perforation Pitch: 8 mm (center-to-center distance) – consistent hole spacing
- Open Area: 35% – high flow capacity with effective filtration
- Perforation Pattern: Helical (spiral) – minimizes stress concentration and improves mechanical stability
- Surface Finish: Mill finish (optional polished or trimmed ends available)
- Length: Customizable (standard random lengths, cut-to-size available)
| Parameter | Value |
|---|---|
| Material Grade | 316L (UNS S31603) |
| Outer Diameter (OD) | 4 inch (101.6 mm) |
| Wall Thickness | 1.5 mm (0.059 inch) |
| Pitch (Center-to-Center) | 8 mm |
| Open Area | 35% |
| Perforation Shape | Round (helically arranged) |
| Standard | Manufactured per industry standards (customizable) |
Advantages of Helical Perforation: Unlike straight-line perforations, the helical pattern distributes holes in a spiral path around the tube. This design reduces the likelihood of crack propagation between holes, enhances the tube's resistance to internal pressure, and provides a more uniform flow distribution. It is particularly beneficial for applications where the tube is subjected to bending or vibration, such as in oil and gas filtration, water treatment, and pneumatic conveying systems.
Customer Benefits: By choosing our 316L stainless steel helically perforated tube, you gain:
- Long service life due to excellent corrosion resistance, reducing replacement costs.
- High open area (35%) ensures efficient fluid/gas flow, minimizing pressure drop.
- Customizable length and finishing options to fit your specific equipment or project.
- Consistent hole size and pitch for predictable filtration performance.
- Strong structural integrity from helical pattern, suitable for high-pressure applications.
Our factory, located in Hengshui, Hebei, China, has been a trusted supplier since 1998. With an annual export value of US$5-10 million, we serve clients in North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and domestic markets. We ship from major ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring timely delivery. Our experienced team can provide technical support and custom solutions to meet your unique requirements. Contact us today for a quote or to discuss your project – we are committed to delivering quality products that exceed expectations.
Frequently Asked Questions (FAQ)
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Q: What is the difference between 316L and 304 stainless steel for perforated tubes?
A: 316L contains molybdenum, which provides superior resistance to chlorides and acidic environments. It is recommended for marine, chemical, and high-temperature applications. 304 is suitable for less corrosive environments. -
Q: Can I get custom lengths or diameters?
A: Yes, we offer customization on length, diameter, wall thickness, and open area. Please provide your specifications for a tailored solution. -
Q: What is the maximum operating temperature for this tube?
A: 316L stainless steel can be used up to approximately 800°C (1472°F) in continuous service, but the actual limit depends on the environment. For high-temperature applications, please consult our technical team. -
Q: How is the tube packed for export?
A: Tubes are packed in bundles with protective wrapping, or in wooden crates for fragile orders. We ensure secure packaging to prevent damage during transit. -
Q: What is the typical lead time?
A: Lead time depends on quantity and customization. Standard sizes usually ship within 15-20 working days. Bulk or custom orders may require 25-30 days. Contact us for an accurate estimate. -
Q: Can you provide a certificate of material or test reports?
A: Yes, we can provide mill test certificates (MTC) tracing material to the original mill. Third-party inspection is available upon request. -
Q: Is the tube suitable for food-grade applications?
A: 316L stainless steel is commonly used in food processing and pharmaceutical equipment due to its hygienic properties and ease of cleaning. However, surface finish requirements may differ; we can supply polished finishes as needed. -
Q: How do you ensure consistent hole size and pitch?
A: Our perforating machines are CNC-controlled with high precision tooling. We perform regular quality checks during production to maintain tolerances.
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