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Compact Spiral Welded Steel Pipe
In applications requiring robust yet space-efficient fluid or gas conveyance, compact spiral welded steel pipes are the engineered solution. This product category, often referred to by terms such as Small Size Spiral Welded Pipe, Small Bore Spiral Welded Tube, Small Caliber Spiral Steel Pipe, and Mini Diameter Spiral Welded Pipe, is specifically designed for scenarios where larger diameter pipes are impractical. The unique spiral weld manufacturing process provides exceptional strength-to-weight ratios and structural integrity, even in smaller diameters, making these pipes ideal for intricate industrial systems, compact mechanical assemblies, HVAC ducting, and specialized architectural applications where reliability in confined spaces is paramount.
The manufacturing excellence of our Compact Spiral Welded Steel Pipe ensures consistent performance under pressure and environmental stress. Unlike longitudinal seams, the continuous spiral weld distributes stress more evenly along the pipe's length, significantly enhancing its resistance to internal pressure, bending forces, and potential fatigue. This construction method allows for the production of pipes with precise dimensional tolerances and superior roundness, which is critical for ensuring leak-proof connections and efficient flow dynamics. The versatility of this product is further evidenced by its availability in various steel grades, wall thicknesses, and protective coatings, allowing it to be tailored for specific corrosive environments or load-bearing requirements.
Key Specifications & Parameters
Our compact spiral welded pipes are manufactured to meet stringent international standards. Below are the core specifications that define our product range:
- Production Standard: API 5L, ASTM A139, ASTM A252, EN 10219, or customer-specific specifications.
- Steel Grade: Common grades include Q235, Q345, A/B, X42 to X70, and other low-alloy high-strength steels.
- Diameter Range (OD): From 6 inches (168mm) down to compact sizes of 2 inches (50mm) and below, catering to small bore and mini diameter requirements.
- Wall Thickness: Available from 3mm to 12.7mm, providing a balance between pressure capacity and weight.
- Length: Standard single random lengths of 6m or 12m, with double random and cut-to-length options available.
- Weld Type: Submerged Arc Welding (SAW) ensures a deep, uniform, and high-strength weld seam.
- End Finish: Plain end, beveled end, or threaded and coupled as per application needs.
- Surface Treatment: Bare, black painted, varnish coated, or polyethylene/3-layer PE coated for corrosion protection.
Detailed Product Data Table
| Outer Diameter (mm) | Wall Thickness (mm) | Approx. Weight (kg/m) | Pressure Rating (PN)* | Common Application |
|---|---|---|---|---|
| 60.3 | 3.0 - 4.5 | 4.24 - 6.21 | 16 - 25 | Instrumentation lines, compact hydraulic systems |
| 88.9 | 3.5 - 5.0 | 7.38 - 10.35 | 20 - 30 | HVAC, water supply in constrained spaces |
| 114.3 | 4.0 - 6.0 | 10.88 - 16.02 | 25 - 35 | Structural columns, piling, industrial process lines |
| 168.3 | 4.5 - 8.0 | 18.18 - 31.65 | 30 - 40+ | Piling, foundation support, larger bore utility conduits |
*Pressure Rating (PN) is indicative and varies based on steel grade and safety factors. Exact ratings are provided with technical datasheets.
Advantages of Compact Spiral Welded Design
- Enhanced Strength: The helical seam offers superior resistance to circumferential stress compared to straight-seam pipes of similar size.
- Dimensional Flexibility: Ability to produce a wide range of diameters from a single strip width, ideal for custom small caliber orders.
- Excellent Roundness: Critical for reliable sealing with flanges and fittings, reducing installation issues.
- Economic Efficiency: Cost-effective production for medium to high-volume requirements of specialized sizes.
- Proven Durability: Suitable for long-term use in demanding environments including construction, infrastructure, and plant engineering.
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