Name Stainless Steel Concentric Reducer Material Stainless Steel ASTM A240 304 304L 316L 321 321H 347 347H 904L ASTM A789 S31803 S32205 S32750 Standard   ASME B16.9, ANSI B16.9, ASTM , JISB2312,DIN,BS, GBT12459-05, GB13401-05,GOST Size Customized Size Wall thickness Sch5S, Sch10S, Sch40S, Sch80S Sch10,Sch20,Sch30,STD,Sch40,Sch60,XS,Sch80S Type Butt welded or Seamless Shape Equal or Reducing Surface Pickling; Sand