S235JR Longitudinaly Submerged Arc Welded Pipes
Detailed Product Introduction of S235JR Longitudinal Submerged Arc Welded Pipe
S235JR longitudinal submerged arc welded pipe is a straight seam welded steel pipe produced using S235JR structural steel as the base material and through single-wire or double-wire submerged arc welding technology. This product is widely used in important engineering structures and pressure piping systems due to its excellent weld quality and stable mechanical properties.
Technical Features
|
Performance Indicators |
Standard requirements | Typical measured values |
|---|---|---|
| Yield Strength | ≥235 MPa | 255-280 MPa |
| Tensile Strength | 360-510 MPa | 410-460 MPa |
| Elongation | ≥26% | 28-32% |
| Impact Energy | ≥27J(20℃) | 40-60J |
| Weld Strength | Not less than the substrate | Not less than the substrate, reaching 95-105% of the substrate content |
Corrosion Protection Treatment of S235JR Longitudinal Submerged Arc Welded Pipe
A multi-layer protection system is adopted: First, the surface of the welded pipe is sandblasted to achieve a cleanliness level of Sa2.5. Then, an epoxy zinc-rich primer (80μm) is applied for cathodic protection. An intermediate layer of epoxy micaceous iron oxide paint (100μm) is applied to enhance the shielding effect. Finally, a polyurethane topcoat (60μm) is applied to ensure weather resistance. Pipes treated with this process can withstand C4-level corrosion environments and have a durability of over 15 years under industrial atmospheric and marine climate conditions. They are particularly suitable for long-term use in heavily corrosive environments such as port machinery and offshore platforms.
About us
We are a professional trading company specializing in welded pipe exports, providing integrated supply chain solutions from the procurement of high-quality raw materials to international transportation, ensuring the efficient and reliable delivery of various standard and customized welded pipes to the global market.
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