ASTM A789-789M Universal Welded Ferrite/Austenitic Dual Phase Steel Welded Pipe

Duplex Stainless Steel (DSS) and Super Duplex Stainless Steel (SDSS) welded pipes are manufactured via cold working processes with automatic welding. Key specifications and details are as follows: – Outer Diameter (OD) : 12-203 mm – Wall Thickness : 1.24-30.96 mm – Surface Treatment : Acid-washed (removes oxide scale, weld residues and surface contaminants, enhancing corrosion resistance and surface cleanliness-critical for preventing harmful intermetallic phase (σ phase) precipitation in harsh marine and chemical corrosion environments) – Application Scope : Suitable for pipelines transporting liquids and gases. Widely used in boiler systems, chemical processing, offshore platforms, marine piping systems, and other industrial fields requiring high strength and superior corrosion resistance.