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Help CenterCNC Precision Stainless Steel Spiral Punched Tube, 0.5mm Tolerance, 316L Material, 20mm ID
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Anping County Boli Hardware Wiremesh Products Factory, established in 1998, is proud to present our CNC Precision Stainless Steel Spiral Punched Tube – a high-performance filtration and separation component engineered for demanding industrial applications. With over two decades of manufacturing expertise, we combine advanced CNC technology with premium 316L stainless steel to deliver tubes that offer exceptional dimensional accuracy, corrosion resistance, and mechanical strength. This product is specifically designed with a 0.5mm tolerance and a 20mm inner diameter, ensuring reliable performance in critical environments.
Our spiral punched tube features a unique helical pattern that maximizes open area while maintaining structural integrity. This design allows for efficient fluid flow, reduced clogging, and easy cleaning. The 316L material provides excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, making it ideal for use in chemical processing, food and beverage, pharmaceutical, water treatment, and oil & gas industries. Each tube is produced under strict quality control, with every dimension verified to meet the specified tolerance.
We understand that precision is non-negotiable in B2B applications. That's why our CNC machines are calibrated to maintain consistent hole size, spacing, and alignment along the entire length of the tube. The result is a product that not only fits seamlessly into your existing systems but also enhances overall efficiency.
| Parameter | Value |
|---|---|
| Material | 316L Stainless Steel (UNS S31603) |
| Inner Diameter | 20mm (±0.5mm tolerance) |
| Outer Diameter | Customizable (available upon request) |
| Length | Customizable (up to 6000mm available) |
| Hole Pattern | Spiral punched, continuous slot / round hole optional |
| Hole Diameter | 0.5mm – 10mm (customizable) |
| Open Area | Up to 35% (depending on hole size and pattern) |
| Surface Finish | Mill finish, pickled, passivated, or customized |
| End Connection | Plain, threaded, flanged, or welded (as per request) |
Key Features & Benefits:
- High Precision CNC Machining: Ensures consistent hole size, shape, and spacing, reducing pressure drop and improving filtration efficiency.
- 316L Stainless Steel: Superior corrosion resistance, especially in chloride environments; suitable for high-temperature applications (up to 450°C in continuous service).
- Unique Spiral Design: The helical punched pattern provides a self-cleaning effect, minimizes clogging, and increases mechanical strength compared to straight perforated tubes.
- 0.5mm Tolerance: Guarantees precise fit in assembly, reducing installation time and ensuring reliable sealing.
- Customizable Dimensions: Length, outer diameter, wall thickness, and hole patterns can be tailored to your specific requirements.
- Easy Maintenance: Smooth internal surface and spiral structure allow for simple backwashing and chemical cleaning.
- Versatile Applications: Ideal for filter elements, diffusers, distributors, catalyst supports, and liquid/gas separation equipment.
- Rigorous Quality Control: Each tube undergoes dimensional inspection, visual check, and pressure testing (if required) before shipment.
The spiral punching process creates a continuous helical slot or round hole pattern along the tube wall. This geometry offers distinct advantages over traditional straight perforated tubes: the spiral orientation distributes stress evenly, making the tube more resistant to crushing and bending forces. Additionally, the spiral pattern directs fluid flow tangentially, which helps prevent solids from adhering to the surface and facilitates self-cleaning.
Our CNC precision ensures that the distance between holes (pitch) and the angle of the spiral are consistent throughout the entire length. This is critical for applications that require uniform flow distribution, such as in fluidized beds or sparger systems. The 316L material also meets the requirements of NACE MR0175 for sour service, making it suitable for oil and gas environments (confirmation available upon request).
We offer a range of optional surface treatments: electropolishing for a mirror-like finish, passivation for enhanced corrosion resistance, or high-temperature annealing for stress relief. If you need specific certifications, such as material test reports (MTR) or dimensional certificates, we can provide them as part of your order documentation.
Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer since 1998. Our annual export volume exceeds US$5 million, with shipments to major ports including Tianjin, Qingdao, Shanghai, and Foshan. We serve a global customer base across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our long-standing relationships with clients in demanding industries – from chemical processing to water treatment – are a testament to the reliability of our products.
We maintain a strict quality management system and have established partnerships with experienced logistics providers to ensure timely delivery. Whether you need a standard 20mm ID tube or a fully customized design, our engineering team is ready to assist you. We also offer free samples for evaluation (subject to stock availability) to help you test the product in your specific application.
Contact us today for a quotation or technical consultation. Let our 25+ years of expertise work for you.
Frequently Asked Questions
1. What is the maximum length available for these spiral punched tubes?
We can produce tubes up to 6000mm (6 meters) in length as a single piece. For longer lengths, we can provide welded sections or custom lengths upon request. Please contact our sales team with your specific requirements.
2. Can the hole pattern be customized, e.g., slot size or spacing?
Yes, the hole diameter, slot width, pitch, and spiral angle are all customizable. We can produce round holes, rectangular slots, or other shapes based on your design. Minimum hole size is 0.5mm, and maximum open area is approximately 35%.
3. Is this product suitable for high-temperature applications?
316L stainless steel can withstand continuous service temperatures up to 450°C (842°F) in oxidizing environments. For higher temperatures or reducing atmospheres, we recommend alternative materials such as 310S or Inconel, which we can also supply upon request.
4. What is the typical lead time for custom orders?
Standard lead time is 15–25 working days after confirmation of order and receipt of deposit. For urgent orders, we can expedite production to 10–15 days, subject to additional charges. Please inquire for exact timelines.
5. How do you ensure the 0.5mm tolerance is maintained?
Our CNC machines are equipped with precision servo motors and feedback systems. We use calibrated gauges and coordinate measuring machines (CMM) to inspect the inner diameter, outer diameter, and hole positions at multiple points along the tube. A dimensional inspection report can be provided with each shipment.
6. Can the tube be used for food-grade applications?
Yes, 316L stainless steel is widely accepted in food processing, dairy, and beverage industries. We can supply tubes with a surface finish of Ra ≤ 0.8μm (mirror polish) to meet hygienic standards. Please specify your requirements when ordering.
7. What packaging do you use for export?
Each tube is individually wrapped with protective foam or bubble wrap, then packed in sturdy wooden crates or cartons suitable for sea freight. We also offer custom packaging (e.g., vacuum packing, anti-rust paper) for corrosive environments. The packaging is designed to prevent damage during transit from our ports in Tianjin, Qingdao, or Shanghai.
8. Do you offer samples for testing?
Yes, we provide free samples of standard sizes (subject to stock availability). For custom dimensions, a small sample fee may apply, which is refundable upon placing a formal order. Contact us to arrange sample delivery.
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