... Process method: Cold drawn, Pickling, Polishing, Annealing, Inner bead Removed, Inner Pplishing, TIG welded, Plasma Arc Welded.3) Standards: ASTM ... ASTM A269, ASTM A270, ASTM A312,DIN 118504) Mark: Steel Seal and Label5) Applied field: Decoration, Heat-Exchanger, Condenser Tubes, ... customers' requests. ASTM A312 Welded and Inner Bead Removed Stainless Steel Pipes, Tubes and Tubings for Liquid Delivery