... Steel Welded Pipe, Duplex Stainless Steel Welded Pipe Standard: ASTM, JIS, DIN, EN, GB, KS Material: 310S, 309S, 316, 316L, 321 ... ,A790,A376,A249,EN10217-7-2005,GB14976-2002,GB13296-2009,JIS G3459-2004,JIS3463-2006,etcMaterial309S,310S,316,316L,316Ti,317,317L ...