... ~114mm,L<=8000mm 3)ASTM B338 4)Gr1,Gr2,Gr3,Gr4,Gr5,Gr6,Gr12 Titanium Tube MaterialUnalloyed titanium and alloy titanium GradeGr1,Gr2,Gr3 ... ,ASTM B337ASTM B8613~50.2,0.3,0.5,0.6>5~100.3, 0.5,0.6,0.8,1.0,1.25>10~150.5,0.6,0 ... >15~200.5~2.0M>20~300.5~2.0M ASTM B338 Titanium seamless pipe for exchanger