1.90 degree titanium elbow. 2.material:Gr1,gr2,gr5,gr7,gr9,gr12, ... 3.standard:astm b363,astm b16.9 designation: seamless elbow,butt-welding elbows standard: astm b363,astmb16.9,gb ... ,GR9,GR10,GR12size:DN20Xthickness----DN1200Xthickness or as your requirement with drawinginspection for welding line:x-ray press test:hydrostatic ... satisfaction!Queent Ti, Benefit the world!Hope cooperation with you asap.