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As a leading manufacturer based in Hengshui, Hebei, China, Anping County Boli Hardware Wiremesh Products Factory specializes in producing high-quality 316L Stainless Steel Spiral Finned Tubes designed specifically for corrosive chemical environments. With over two decades of experience since 1998, we have honed our manufacturing processes to deliver tubes that offer exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in harsh chemical media. Our spiral finned tubes are engineered to maximize heat transfer efficiency while maintaining structural integrity under extreme conditions, making them a reliable choice for demanding industrial applications.
The 316L grade stainless steel contains molybdenum, which significantly enhances its corrosion resistance compared to standard 304 stainless steel. This makes our spiral finned tubes particularly suitable for environments containing chlorides, acids, and other aggressive chemicals. The spiral fin design increases the surface area for heat exchange, enabling more compact and efficient heat exchanger systems. Whether you need tubes for shell-and-tube exchangers, air coolers, or condensers, our products are customizable to meet your specific requirements.
Key Features & Benefits
- Superior Corrosion Resistance: 316L stainless steel with low carbon content minimizes carbide precipitation during welding, ensuring excellent resistance to intergranular corrosion in chloride-laden environments.
- High Heat Transfer Efficiency: Spiral fins provide a large heat transfer area per unit length, improving thermal performance by up to 30% compared to bare tubes.
- Durable Construction: Fins are tightly wound and mechanically bonded or welded to the tube core, ensuring long service life even under thermal cycling and vibration.
- Customizable Dimensions: Tube diameter, fin height, fin pitch, and overall length can be tailored to fit your specific heat exchanger design.
- Easy Installation: Smooth tube ends and consistent geometry allow for straightforward installation into tube sheets or headers.
- Wide Temperature Range: Suitable for operating temperatures from -196°C to 800°C, depending on application conditions.
Technical Specifications (Typical)
| Parameter | Value |
| Material Grade | 316L (UNS S31603) |
| Tube Outer Diameter | 16mm, 19mm, 25mm, 32mm (custom) |
| Fin Height | 10mm, 12mm, 15mm, 20mm (custom) |
| Fin Pitch | 2.5mm, 3.0mm, 3.5mm, 5.0mm (custom) |
| Wall Thickness | 1.5mm – 3.0mm (custom) |
| Maximum Length | 12 meters (single piece, longer available upon request) |
| Fin Attachment Method | Mechanical expansion or laser welding |
| Surface Finish | Pickled, passivated, or bright annealed |
Applications in Corrosive Chemical Environments
- Chemical Processing: Used in heat exchangers for sulfuric acid, hydrochloric acid, and caustic soda production.
- Petrochemical Industry: Ideal for cooling towers, condensers, and reboilers handling corrosive hydrocarbons.
- Pharmaceutical Manufacturing: Suitable for sterile and clean-in-place (CIP) systems requiring high purity and corrosion resistance.
- Desalination Plants: Resists chloride attack in seawater heat exchangers for brine heating and evaporation.
- Power Generation: Used in flue gas desulfurization (FGD) systems and feedwater heaters.
- Food & Beverage: Handles acidic cleaning agents and high-temperature sterilization cycles.
Quality Assurance & Production Capability
At Anping County Boli Hardware Wiremesh Products Factory, we maintain strict quality control throughout the production process. Our manufacturing facility is equipped with advanced finning machines, automatic welding systems, and precision cutting tools. Each tube undergoes hydrostatic testing, dimensional inspection, and visual examination before shipment. We also offer third-party inspection services upon request.
With an annual export value of US$5 million to US$10 million, we have established a strong global presence, exporting to major markets including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Western Europe. Our products are shipped from major Chinese ports such as Tianjin, Qingdao, Shanghai, and Foshan, ensuring timely delivery to customers worldwide.
Our experienced engineering team can assist with custom design and provide technical support to ensure the optimal finned tube configuration for your specific heat transfer requirements. We are committed to providing cost-effective solutions without compromising on quality.
Frequently Asked Questions (FAQ)
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Q: What is the difference between 316L and 316 stainless steel for finned tubes?
A: 316L has a lower carbon content (max 0.03%) compared to 316 (max 0.08%). This reduces the risk of carbide precipitation during welding, making 316L more resistant to intergranular corrosion in elevated temperature applications. For corrosive chemical environments, 316L is often preferred. -
Q: Can you produce spiral finned tubes with fins welded instead of mechanically bonded?
A: Yes, we offer both mechanical expansion (L-foot or overlapped) and laser welding fin attachment methods. Welded fins provide a stronger bond for high-temperature or high-vibration applications, while mechanical bonding is cost-effective for standard conditions. -
Q: What is the maximum operating temperature for 316L spiral finned tubes?
A: 316L stainless steel can typically operate up to 800°C in continuous service, but the actual limit depends on factors such as the fin attachment method, pressure, and corrosive environment. For specific applications, we recommend consulting our technical team. -
Q: How do you ensure the fin pitch is uniform along the entire tube length?
A: Our CNC-controlled finning machines maintain precise pitch accuracy within ±0.2mm. Each tube is inspected after production to verify consistency. -
Q: Do you provide samples for testing before bulk order?
A: Yes, we can supply sample tubes (typically 1 meter length) for evaluation. Sample cost and shipping are negotiable, and we will deduct the sample cost from the first bulk order if placed. -
Q: What is the typical lead time for custom orders?
A: For standard sizes, lead time is 15–20 days after order confirmation. Custom dimensions may require 25–30 days depending on complexity and quantity. -
Q: Can you provide certifications for material traceability?
A: Yes, we can supply mill test certificates (MTC) for 316L stainless steel raw material, as well as a certificate of compliance for the finished product. Third-party certification (e.g., from SGS or BV) is available upon request. -
Q: How do you pack the finned tubes for export?
A: Tubes are packed in wooden crates or steel bundles with protective wrapping to prevent damage during transit. For fragile thin-wall tubes, additional foam padding is used. We also offer seaworthy packing for container shipment.
Contact us today for a quotation or technical consultation. With our proven track record and global reach, Anping County Boli Hardware Wiremesh Products Factory is your trusted partner for 316L stainless steel spiral finned tubes in corrosive chemical environments.
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