Major Radius STD 90 Elbow Standard:ASME/ANSI B16.9;GBGB12459; SH3409 Material:alloy Certificate: ... ,Sch10s,Sch10,Sch20,Sch30,Sch40s,STD,Sch40,Sch60,Sch80s,XS;Sch80,Sch100,Sch120,Sch140,Sch160,XXS3. According to degree: 45,90 ... ;SY/T5257; ASME/ANSI B16.11 Major Radius STD 90 Elbow