In the global procurement of stainless steel pipes, dimensional accuracy and competitive price are often the key considerations for engineers and purchasing managers. ERW (Extreme Resistance Welded) stainless steel pipes, with their unique processing characteristics, fill this market gap.
This article will provide a detailed analysis of the core value of ERW stainless steel pipes and offer a comprehensive table of commonly used specifications and dimensions to help you quickly and accurately select the right type.
I. Core Value: Why Choose High-Precision ERW Stainless Steel Pipe?
- Ultimate Dimensional Control
ERW stainless steel pipe uses continuously cold-rolled strip steel as raw material. Because the steel strip undergoes high-precision rolling before forming, its wall thickness uniformity far exceeds that of seamless steel pipe. This means you can achieve greater consistency in automated welding, laser cutting, or precision structural assembly. - Competitive Cost Structure
Compared to seamless pipe, which has a long production cycle and high energy consumption, ERW production lines offer extremely high output efficiency. By optimizing production processes and achieving economies of scale, we can provide customers with more competitive unit prices, reducing material budgets for large projects. - Optimized Surface and Internal Welds
Modern ERW technology ensures the roundness of the pipe inside and out through online bead removal and precision sizing. For fluid transport, this reduces frictional resistance; for decorative applications, it provides a perfect visual effect.
II. ERW Stainless Steel Pipe Common Specifications and Dimensions (ASTM A312/A554 Standards)
The following table covers common specifications for industrial and structural applications. We can provide customized length services based on your specific needs.
1. Round Pipe Specification Reference Table (Metric & Imperial)
| Nominal Bore (NB) | Outside Diameter (OD) mm | SCH 5S (mm) | SCH 10S (mm) | SCH 40S (mm) | Theoretical Weight (kg/m – 304) |
|---|---|---|---|---|---|
| 1/2″ | 21.34 | 1.65 | 2.11 | 2.77 | 1.27 (SCH 40) |
| 3/4″ | 26.67 | 1.65 | 2.11 | 2.87 | 1.69 (SCH 40) |
| 1″ | 33.40 | 1.65 | 2.77 | 3.38 | 2.50 (SCH 40) |
| 1-1/4″ | 42.16 | 1.65 | 2.77 | 3.56 | 3.39 (SCH 40) |
| 1-1/2″ | 48.26 | 1.65 | 2.77 | 3.68 | 4.05 (SCH 40) |
| 2″ | 60.33 | 1.65 | 2.77 | 3.91 | 5.44 (SCH 40) |
| 3″ | 88.90 | 2.11 | 3.05 | 5.49 | 11.30 (SCH 40) |
| 4″ | 114.30 | 2.11 | 3.05 | 6.02 | 16.08 (SCH 40) |
| 6″ | 168.28 | 2.77 | 3.40 | 7.11 | 28.26 (SCH 40) |
Note: The above weight calculation formula is for reference: W = (OD − WT) × WT × 0.02491 (applicable to 304 material, W = kg/m).
2. Standard Sizes for Square and Rectangular Pipe Structures
| Size (mm x mm) | Wall Thickness Range (mm) | Application Type |
|---|---|---|
| 20 x 20 | 1.0 – 2.5 | Office furniture, precision frames |
| 40 x 40 | 1.2 – 3.0 | Architectural handrails, equipment supports |
| 50 x 100 | 2.0 – 5.0 | Curtain wall columns, industrial platforms |
| 100 x 100 | 3.0 – 6.0 | Heavy structures, warehouse racking |
III. Quality Commitment and Service Advantages
As a professional global supplier, we understand that competitive pricing hinges on uncompromising quality:
- Tolerance Control: Outer diameter tolerance within ±0.1mm, wall thickness tolerance within ±5%.
- Material Guarantee: We provide 100% genuine 304/304L and 316/316L materials, with each batch accompanied by MTC (EN 10204 3.1).
- Surface Treatment: Pickled, polished (180#/240#/320#/400#), or satin finishes are available.
- Flexible Delivery Time: Leveraging our efficient ERW production line, standard specifications can be quickly shipped, shortening your project cycle.