... SCH5S-160. 4) ISO certificated. Features:Product Stainless Steel Pipes,Duplex Steel PipesSize Seamless Pipes 1/2"-20" Welded Pipes ... Standard ASTM/ASME A511,A269,A312,A213.Material Stainless SteelGrade ANSI TP304,304L,310/S,316, ... Pharmaceuticals, Food, Mining, Architectural, Transportation etc.Mill CertificateEN 10204.3.1 etc.Certificate ISO9001 Certificate. Stainless Steel Pipes,Duplex Steel Pipes