S235JR Longitudinally Welded Pipe
S235JR Longitudinal Welded Tube Product Introduction
S235JR longitudinal welded pipe is a straight seam welded steel pipe produced from S235JR structural steel using high-frequency resistance welding (HFW) or submerged arc welding (SAW) processes. This product utilizes continuous roll forming technology, precisely rolling the steel strip into a tubular shape, which is then welded longitudinally along a straight seam.
Welding Methods Comparison
| Method | Thickness Range | Advantages | Disadvantages |
|---|---|---|---|
| SAW | 0.25"-2.5" | High deposition rates | Limited to straight seams |
| HFI Welding | 0.1"-0.5" | No filler metal required | Only for carbon steels |
| Laser Welding | 0.04"-0.5" | Ultra-precise, minimal HAZ | High equipment cost |
S235JR Longitudinal Welded steel tube Quality Control
S235JR longitudinal welded pipe undergoes a comprehensive quality control system: From raw material warehousing, spectral analysis is performed to ensure chemical composition meets standards. During the forming and welding stage, online eddy current testing and ultrasonic flaw detection are used to monitor the weld seam in real time. In the finished product stage, hydrostatic testing verifies pressure resistance, and random samples undergo tensile, bending, and Charpy impact tests. All pipe fittings are equipped with traceable material certificates and test reports, ensuring that the product fully complies with EN 10219 standards, from base material performance to welding quality.
About our company
We are a professional welded steel pipe exporter, providing integrated supply chain solutions from sourcing high-quality raw materials to international shipping. Leveraging our expertise, we are able to reliably deliver certified S235JR welded steel pipes to customers worldwide, complemented by comprehensive quality verification and logistics management.
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