... sch160,XS,XXS Standard:ASTM,ASME,DIN,JIS Certificate:API,ISO,CCS STAINLESS STEEL REDUCER TypeButt welded pipe ... JIS, BS, ISO, GB, SH, AND HG etc MaterialStainless Steel: ASTM A403 WP304, 304L, 310, 316, 316L, 321, ... 347, 904LCarbon Steel: ASTM A234 WPB, WPC ASTM A105 WPHY 42, 46, ... 52, 56, 60, 65, 70, 80Alloy Steel: ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91Low ...