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Thin Gauge Longitudinal Seam Welded Pipe
What is Thin Gauge Longitudinal Seam Welded Pipe?
Thin Gauge Longitudinal Seam Welded Pipe is a specialized steel tubular product characterized by its precise, slender wall thickness achieved through a high-frequency electrical resistance welding (ERW) process along a single, straight seam. This manufacturing technique is essential for creating pipes with exceptional dimensional accuracy and uniform wall consistency, making them ideal for applications where weight, material efficiency, and cost-effectiveness are paramount. Often referred to interchangeably with terms like Light Wall Longitudinal Welded Steel Tube or Slim Wall Straight Seam Welded Pipe, these products are engineered for performance in low-to-medium pressure systems. They serve as a reliable alternative to heavier, seamless pipes in numerous industries. The category also encompasses Low Thickness Longitudinal Welded Tube and Fine Wall Straight Seam Steel Pipe, all denoting a focus on minimal wall cross-section without compromising structural integrity for their intended service.
Technical Specifications and Product Parameters
The defining characteristic of Thin Gauge Longitudinal Seam Welded Pipe is its precise wall thickness, typically falling within a specific range. Our production capabilities allow for tight tolerances, ensuring consistency across large orders. Below is a detailed breakdown of the standard specifications and available options.
Standard Product Specifications
- Welding Process: High-Frequency Induction / Contact Welding (HFI/HFW)
- Seam Type: Longitudinal (Straight Seam)
- Standards: ASTM A53, ASTM A135, ASTM A587, EN 10219, EN 10255, and other international equivalents.
- Common Applications: Architectural structures, furniture frames, automotive components, fluid conveyance (non-critical), greenhouse frameworks, and general mechanical tubing.
Detailed Dimensional Range
| Outer Diameter (OD) | Wall Thickness (WT) Range | Common Length | Steel Grade |
|---|---|---|---|
| 1/2" (21.3 mm) to 4" (114.3 mm) | 0.8 mm to 2.0 mm | Fixed: 6m, 5.8m Random: 4m to 12m |
Q195, Q235, S235JR, S275JR, ASTM A36 |
| 4" (114.3 mm) to 8" (219.1 mm) | 1.5 mm to 3.0 mm | Fixed: 6m, 12m Random: 5m to 14m |
Q235, Q345, S355JR, ASTM A53 Gr. B |
Key Mechanical Properties
| Property | Typical Value (Example for S235JR / Q235B) | Test Standard |
|---|---|---|
| Tensile Strength | 360 - 510 MPa | ASTM A370 / EN ISO 6892-1 |
| Yield Strength (Min) | 235 MPa | |
| Elongation | Min. 22% | |
| Surface Finish | Black (mill), Galvanized (hot-dip or electro), Painted, Oiled | - |
Our manufacturing process for Thin Gauge Longitudinal Seam Welded Pipe includes rigorous in-line inspection using ultrasonic testing (UT) or eddy current testing (ECT) to ensure weld seam integrity. Additional hydrostatic testing can be performed upon request. Tolerances for outer diameter and wall thickness adhere strictly to the "minus" side of the specified standards, guaranteeing the pipe's fitness for purpose in precision assemblies and structures.
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