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Help Center304 Stainless Steel Spiral Punched Tube With Mill Test Report, 1.5mm Thickness, 2mm Hole, Standard Compliant
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Welcome to Anping County Boli Hardware Wiremesh Products Factory — a trusted manufacturer since 1998, specializing in high-quality wire mesh and perforated metal products. Our 304 Stainless Steel Spiral Punched Tube with 1.5mm thickness and 2mm hole diameter is engineered to meet rigorous industrial standards. Backed by our annual export value of US$5–10 million and serving markets across North America, South America, Europe, Asia, and Oceania, we deliver precision and reliability. Each tube comes with a Mill Test Report (MTR) to guarantee material traceability and performance, making it an ideal choice for demanding filtration, shielding, and structural applications.
This spiral punched tube is manufactured from premium 304 stainless steel, offering excellent corrosion resistance, durability, and hygienic properties. The 1.5mm wall thickness ensures structural integrity while the 2mm holes provide optimal flow or ventilation. The spiral design enhances mechanical strength and allows for uniform perforation distribution. Whether you need it for liquid filtration, air intake systems, speaker grilles, or protective sleeves, this product delivers consistent performance and long service life.
Key Features & Technical Specifications
- Material: 304 Stainless Steel (0.08% Carbon max, 18-20% Chromium, 8-10.5% Nickel)
- Thickness: 1.5mm (±0.05mm tolerance)
- Hole Diameter: 2mm (±0.1mm)
- Hole Pattern: Spiral arrangement for even distribution
- Open Area: Approximately 40-45% (depending on pitch)
- Standard Length: 1m, 2m, 3m, or custom lengths
- Surface Finish: Mill finish (can be pickled or passivated upon request)
- Mill Test Report: Ensures chemical composition and mechanical properties
| Parameter | Value |
| Material Grade | 304 (UNS S30400) |
| Wall Thickness | 1.5mm |
| Hole Size | 2mm diameter |
| Perforation Pattern | Spiral |
| Tensile Strength | ≥ 520 MPa (as per MTR) |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
Why choose our spiral punched tube? The combination of 304 stainless steel and spiral perforation offers several advantages over traditional straight-hole tubes:
- Enhanced structural rigidity — the spiral pattern acts like a reinforcing rib, reducing deformation under pressure.
- Uniform flow distribution — ideal for applications where consistent fluid or gas passage is critical.
- Self-cleaning effect — the spiral design helps prevent clogging in filtration applications.
This product is widely used in:
- Filtration: Oil, water, air, and chemical filtration systems.
- Ventilation: Air intake/exhaust covers, speaker grilles, HVAC components.
- Protection: Cable sleeves, heat shields, guard tubes for sensors.
- Decorative: Architectural screens, lighting fixtures, furniture accents.
Our manufacturing process adheres to strict quality control measures. Each batch is tested for dimensional accuracy, material composition, and mechanical properties. The included Mill Test Report provides full traceability, ensuring you receive exactly what you ordered. We also offer customization options: different lengths, hole patterns, and surface treatments (e.g., electro-polishing, powder coating) are available upon request.
With over 25 years of experience, Anping County Boli Hardware Wiremesh Products Factory has built a reputation for reliability and competitive pricing. Our main markets include North America, South America, Europe, Oceania, Asia, and Africa. We ship from multiple ports: Tianjin, Qingdao, Shanghai, and Foshan, ensuring fast and cost-effective logistics. Our annual export value of US$5–10 million reflects our commitment to international standards.
Trust the experts — choose our 304 Stainless Steel Spiral Punched Tube for your next project. Contact us today for a quote, sample, or technical consultation. We are ready to support your requirements with precision and professionalism.
Frequently Asked Questions (FAQ)
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Q: What is the difference between spiral punched tube and standard perforated tube?
A: Spiral punched tube has holes arranged in a helical pattern along the tube, which provides better structural strength and more uniform flow distribution compared to standard straight-line perforations. It also reduces the risk of cracking under stress. -
Q: Can I get a sample before placing a bulk order?
A: Yes, we offer samples (typically 200-300mm length) for customer evaluation. The sample cost is usually covered by the client, and we refund it upon bulk order. Please contact us for details. -
Q: Is the Mill Test Report included for every order?
A: Yes, a Mill Test Report (MTR) is provided with each shipment. It verifies the chemical composition, mechanical properties, and standard compliance of the 304 stainless steel material. -
Q: What is the maximum length available?
A: Standard lengths are 1m, 2m, 3m, and 6m. Custom lengths up to 6m are possible. For longer lengths, welding may be required; we can provide welded joints upon request. -
Q: Can the tube be used for food-grade applications?
A: 304 stainless steel is generally considered food-safe. However, if you require specific food-grade certifications (e.g., FDA), please inform us so we can arrange appropriate surface treatment and documentation. -
Q: What is the tolerance on hole diameter and thickness?
A: Hole diameter tolerance is ±0.1mm, and thickness tolerance is ±0.05mm. We maintain strict quality control to ensure consistency. -
Q: Do you offer custom hole patterns or sizes?
A: Yes, we can customize hole diameter, spacing, and pattern (including spiral pitch) based on your drawings or specifications. A minimum order quantity may apply for custom patterns. -
Q: How is the product packaged for export?
A: Tubes are packed in wooden crates or pallets, with foam or paper protection to prevent scratches during transit. We follow standard export packaging suitable for sea freight.
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