Key Features of Stainless Steel Welded Pipes

1) Manufacturing Process:
• Electric Resistance Welding (ERW): This method involves rolling the steel and welding it longitudinally. It is efficient and ideal for medium to low-pressure applications.
• Spiral Welded: The steel strip is helically welded, forming a spiral seam. This technique is used for large-diameter pipes often used in water transmission and structural applications.
• Longitudinal Welded (L-SAW): Steel plates are rolled into a cylindrical shape and welded along the seam, providing high strength and suitability for high-pressure environments.
2) Material Grades:
• 304 Stainless Steel: Common for general applications, offering good corrosion resistance and weldability.
• 316 Stainless Steel: Contains molybdenum, enhancing resistance to chlorides and corrosive chemicals, making it suitable for marine and chemical environments.
• 321 Stainless Steel: Stabilized with titanium, providing resistance to intergranular corrosion after welding.
3) Sizes and Thicknesses:
• Available in a wide range of diameters from small tubes (less than 1 inch) to large pipes (up to 100 inches or more).
• Thicknesses can vary, typically from 0.5 mm to several inches, depending on the application.
4) Surface Finishes:
• Mill Finish: The standard, unpolished finish from the mill.
• Polished Finish: Available in various grades such as satin or mirror, depending on the application requirements.
• Pickled and Passivated: Treated to remove impurities and enhance corrosion resistance.
5) Corrosion Resistance:
• Stainless steel welded pipes offer excellent resistance to corrosion, making them suitable for harsh environments and chemical exposure.
6) Strength and Durability:
• High tensile strength and toughness, allowing them to withstand high pressures and mechanical stress.
7) Cost-Effectiveness:
• Generally more economical than seamless pipes due to simpler manufacturing processes.