S235 Structural Straight Seam Welded Pipe
Demand：Customizable
Standard：ASTM, AISI, JIS, GB, DIN, EN
Introduction to EN 10219/S235 Structural Welded Steel Pipes
EN10219 welded steel pipes are mainly used in liquid transportation, drainage systems, bridge construction, and other fields. Their advantages lie in advanced manufacturing processes and stable, reliable quality. Strict quality control and testing ensure that products meet standard requirements and provide reliable support for engineering projects. European standard seamless steel pipe S235JR is widely used in the petroleum, natural gas, chemical, and coal industries due to its excellent strength and corrosion resistance.
Product Parameters
| Product Name | EN 10219/S235 Welded Steel Pipe | |
| Standard | EN/DIN/JIS/ASTM/BS/ASME/AISI etc. | |
| Outer Diameter | Seamless: 1/4″-36″ | Welding: 21.3mm-3620mm |
| Round Tube: 1/2″-10″ | Square Tube/Rectangular Tube: 15x15mm-400x600mm | |
| Wall Thickness | Seamless: 1.25mm-50mm | Welding: 1.65mm-65mm |
| Length | 3-12 meters, Support customization | |
Surface Treatment of S235JR Structural Straight Seam Welded Pipe
The core surface treatment methods for S235JR welded structural straight seam pipe include hot-dip galvanizing and a professional coating system. Hot-dip galvanizing involves immersing the pipe body in molten zinc at approximately 450°C, forming a highly adhesive zinc-iron alloy layer that provides decades of long-term corrosion protection, making it particularly suitable for outdoor structures and humid or corrosive industrial environments. For exposed building components or specific corrosion protection requirements, a multi-layer coating system consisting of an epoxy zinc-rich primer, intermediate coat, and fluorocarbon topcoat can be applied after sandblasting (shot blasting) to remove rust. This ensures excellent weather resistance while achieving rich color customization and a high-end aesthetic effect. Furthermore, depending on specific working conditions, sandblasting (Sa2.5 grade) or pickling can be performed alone to thoroughly remove weld slag and oxide scale, obtaining a clean substrate for subsequent processing or short-term protection.
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