... B338,ASTM B337,ASME SB338,ASTM B861 4)Dia2~114mm Titanium pipeMaterialUnalloy titanium and alloy titaniumGradeGr1,Gr2,Gr3,Gr4,Gr5,Gr6,Gr7 ... ,1.5, 2.0,2.5,3.0,3.5>40~501.25,1.5, 2.0,2.5,3.0,3.5>50~601.5, 2 ... .0,2.5,3 ... .0,3.5,4 ... ~801.5, 2.0,2.5,3.0,3.5,4.0,4.5>80~1142.5,3.0,3.5,4.0,4.5160.5,0 ...