... GR1, GR2, GR3,GR5, GR7, GR9,GR12 Standard: ASTM B338/B337 Size: OD 12mm--168mm Titanium pipestandard:ASTM B337 ASTM B338,ASTM B861 material:Gr1,Gr2,Gr3 ... ,Gr4,Gr5,,Gr7,Gr9,Gr12,Gr23,6AL4VEL1 the best price. ... /weld titanium pipe standardASTM B337/338,ASTM B861materialGr1,Gr2,Gr3,Gr4,Gr5,Gr7,Gr9,Gr12,Gr23dia5-159mmthickness0.3-36.0mmlength< ...