... 4.Qualification:API,CE,ISO Detailed description of carbon steel tee Tee TypeEqual tee, reducing tee,lateral tee ... steelStainless steelAlloy steelDuplex steelNickel alloy steelCarbon steel tee, stainless steel tee, alloy steel teeASTM A234 WPB,ASTM A420 WPL6, ... .4,St.35.8,St.35.8/IASTM A333 GR.6,ASTM A860 WPHY 70, WPHY 65, WPHY ... 60, WPHY 52,WPHY 46,WPHY 42,API 5L GRB, X60, ...